[
 {
  "qa_id": "DAVIS__blackswan__object_world_motion_direction__00",
  "video_id": "DAVIS__blackswan",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (black swan with a red beak) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "left",
   "down",
   "backward",
   "right",
   "up"
  ],
  "answer_index": 4,
  "frame_indices": [
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   8
  ],
  "frame_references": [
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    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/DAVIS__blackswan/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__blackswan/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "black swan with a red beak"
  },
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "DAVIS__bmx-bumps__camera_view_direction_change__00",
  "video_id": "DAVIS__bmx-bumps",
  "task": "camera_view_direction_change",
  "question": "From F6 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F6?",
  "answer": "left",
  "options": [
   "down",
   "left",
   "up",
   "right"
  ],
  "answer_index": 1,
  "frame_indices": [
   6,
   8
  ],
  "frame_references": [
   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/DAVIS__bmx-bumps/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__bmx-bumps/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "cyclist in black and red gear with number 91"
  },
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   "yaw_deg": -16.869340237070674,
   "pitch_deg": -1.2200144850766326,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "DAVIS__bmx-bumps__object_world_motion_direction__01",
  "video_id": "DAVIS__bmx-bumps",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object A (cyclist in black and red gear with number 91) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "backward",
   "forward",
   "up",
   "down",
   "left",
   "right"
  ],
  "answer_index": 4,
  "frame_indices": [
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   2
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  "frame_references": [
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    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/DAVIS__bmx-bumps/rgb_0.jpg"
   },
   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/DAVIS__bmx-bumps/rgb_2.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "cyclist in black and red gear with number 91"
  },
  "evidence": {
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    -0.041015701405316594
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   "dominant_component_bootstrap95": [
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    -0.15656542173970484
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "DAVIS__car-roundabout__camera_view_direction_change__00",
  "video_id": "DAVIS__car-roundabout",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
   "left",
   "down",
   "right",
   "up"
  ],
  "answer_index": 2,
  "frame_indices": [
   0,
   8
  ],
  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/DAVIS__car-roundabout/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__car-roundabout/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "dark grey mini cooper"
  },
  "evidence": {
   "yaw_deg": 32.736384838299365,
   "pitch_deg": -1.0114760501761715,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "DAVIS__car-roundabout__object_world_motion_direction__01",
  "video_id": "DAVIS__car-roundabout",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (dark grey mini cooper) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "left",
   "backward",
   "down",
   "right",
   "forward",
   "up"
  ],
  "answer_index": 3,
  "frame_indices": [
   0,
   8
  ],
  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/DAVIS__car-roundabout/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__car-roundabout/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "dark grey mini cooper"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "dominant_component_bootstrap95": [
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   ],
   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "DAVIS__car-shadow__camera_view_direction_change__00",
  "video_id": "DAVIS__car-shadow",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
   "up",
   "right",
   "down",
   "left"
  ],
  "answer_index": 3,
  "frame_indices": [
   0,
   8
  ],
  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/DAVIS__car-shadow/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 39,
    "released_frame_name": "00040.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__car-shadow/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "silver compact car"
  },
  "evidence": {
   "yaw_deg": -34.95953521140439,
   "pitch_deg": 0.007509423945849435,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "DAVIS__car-shadow__object_world_motion_direction__01",
  "video_id": "DAVIS__car-shadow",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (silver compact car) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "backward",
   "left",
   "right",
   "up",
   "forward",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
   0,
   8
  ],
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   {
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/DAVIS__car-shadow/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 39,
    "released_frame_name": "00040.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__car-shadow/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "silver compact car"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "DAVIS__car-shadow__camera_object_distance_change__02",
  "video_id": "DAVIS__car-shadow",
  "task": "camera_object_distance_change",
  "question": "From F0 to F8, did object A (silver compact car) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
   "closer",
   "farther"
  ],
  "answer_index": 1,
  "frame_indices": [
   0,
   8
  ],
  "frame_references": [
   {
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/DAVIS__car-shadow/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 39,
    "released_frame_name": "00040.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__car-shadow/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "silver compact car"
  },
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
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 {
  "qa_id": "DAVIS__car-turn__camera_view_direction_change__00",
  "video_id": "DAVIS__car-turn",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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   "left",
   "up",
   "right"
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  "frame_indices": [
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    "image_path": "cases/DAVIS__car-turn/rgb_8.jpg"
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  "target_mapping": {
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 {
  "qa_id": "DAVIS__car-turn__camera_object_distance_change__01",
  "video_id": "DAVIS__car-turn",
  "task": "camera_object_distance_change",
  "question": "From F0 to F8, did object A (silver compact SUV) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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 {
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 },
 {
  "qa_id": "DAVIS__dog__camera_translation_direction__00",
  "video_id": "DAVIS__dog",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "left"
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  "frame_indices": [
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 },
 {
  "qa_id": "DAVIS__dog__camera_view_direction_change__01",
  "video_id": "DAVIS__dog",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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  "frame_indices": [
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    "image_path": "cases/DAVIS__dog/rgb_8.jpg"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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 },
 {
  "qa_id": "DAVIS__dog__object_world_motion_direction__02",
  "video_id": "DAVIS__dog",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F7, in which dominant direction did object A (white dog with a collar) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "left",
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   "right",
   "backward"
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  "object_ids": [
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  "target_descriptions": {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 },
 {
  "qa_id": "DAVIS__dog__camera_object_distance_change__03",
  "video_id": "DAVIS__dog",
  "task": "camera_object_distance_change",
  "question": "From F2 to F7, did object A (white dog with a collar) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
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   "closer"
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  "frame_indices": [
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   7
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    "released_frame_index": 43,
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  "target_mapping": {
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  "target_descriptions": {
   "A": "white dog with a collar"
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   "range_change_bootstrap95": [
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "min_forward_coverage": 0.25,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
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 {
  "qa_id": "DAVIS__dogs-scale__object_world_motion_direction__00",
  "video_id": "DAVIS__dogs-scale",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (black and tan puppy standing on a white scale) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "left",
   "down",
   "backward",
   "up",
   "forward"
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  "frame_indices": [
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   8
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    "image_path": "cases/DAVIS__dogs-scale/rgb_5.jpg"
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/DAVIS__dogs-scale/rgb_8.jpg"
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  "target_mapping": {
   "A": "g1",
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   "A": "black and tan puppy standing on a white scale",
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
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   "pair_range_abs": 0.1,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "DAVIS__dogs-scale__object_travel_distance_comparison__01",
  "video_id": "DAVIS__dogs-scale",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F5 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (black and tan puppy standing on a white scale) or B (black and tan puppy sitting on the wooden table)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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    "released_frame_index": 37,
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    "released_frame_index": 43,
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    "normalized_time": 0.8775510204081632,
    "image_path": "cases/DAVIS__dogs-scale/rgb_7.jpg"
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    "released_frame_index": 49,
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   "initial_track_counts": [
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   "track_survival": [
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "direction_dominance": 2.0,
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   "camera_turn_deg": 15.0,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "DAVIS__drift-turn__camera_object_distance_change__00",
  "video_id": "DAVIS__drift-turn",
  "task": "camera_object_distance_change",
  "question": "From F4 to F6, did object A (white and orange drift car with large rear wing) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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  "frame_indices": [
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    "normalized_time": 0.7551020408163265,
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   "A": "white and orange drift car with large rear wing"
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "DAVIS__flamingo__object_world_motion_direction__00",
  "video_id": "DAVIS__flamingo",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (white flamingo with pink-tipped wings and long orange legs wading in water) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "backward",
   "forward",
   "right",
   "left"
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  "answer_index": 4,
  "frame_indices": [
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   {
    "frame_index": 8,
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    "image_path": "cases/DAVIS__flamingo/rgb_8.jpg"
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "DAVIS__gold-fish__object_world_motion_direction__00",
  "video_id": "DAVIS__gold-fish",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (orange fish with flowing fins) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "forward",
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   "down",
   "left",
   "up"
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  "answer_index": 1,
  "frame_indices": [
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   {
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    "image_path": "cases/DAVIS__gold-fish/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g2",
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   "A": "orange fish with flowing fins",
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  "thresholds": {
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 },
 {
  "qa_id": "DAVIS__horsejump-high__camera_object_distance_change__00",
  "video_id": "DAVIS__horsejump-high",
  "task": "camera_object_distance_change",
  "question": "From F5 to F8, did object A (equestrian rider in white breeches and orange helmet) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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  "answer_index": 1,
  "frame_indices": [
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  "video_id": "DAVIS__lady-running",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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   "right",
   "up"
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  "frame_indices": [
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  "video_id": "DAVIS__lady-running",
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  "qa_id": "DAVIS__loading__object_world_motion_direction__00",
  "video_id": "DAVIS__loading",
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  "question": "After compensating for camera motion from F2 to F6, in which dominant direction did object B (blue and black Samsung TV box) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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  "video_id": "DAVIS__loading",
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 {
  "qa_id": "DAVIS__loading__object_travel_distance_comparison__03",
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  "question": "Over the sampled trajectory from F2 through F6, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (man wearing a blue and grey work jacket) or B (blue and black Samsung TV box)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "DAVIS__longboard__camera_translation_direction__00",
  "video_id": "DAVIS__longboard",
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  "question": "From F4 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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 {
  "qa_id": "DAVIS__longboard__object_world_motion_direction__01",
  "video_id": "DAVIS__longboard",
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  "question": "After compensating for camera motion from F4 to F8, in which dominant direction did object A (person in yellow shirt with black backpack) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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 },
 {
  "qa_id": "DAVIS__motocross-bumps__camera_view_direction_change__00",
  "video_id": "DAVIS__motocross-bumps",
  "task": "camera_view_direction_change",
  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 {
  "qa_id": "DAVIS__night-race__camera_translation_direction__00",
  "video_id": "DAVIS__night-race",
  "task": "camera_translation_direction",
  "question": "From F0 to F2, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "up",
   "forward"
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 {
  "qa_id": "DAVIS__night-race__object_world_motion_direction__01",
  "video_id": "DAVIS__night-race",
  "task": "object_world_motion_direction",
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 {
  "qa_id": "DAVIS__night-race__object_world_motion_direction__02",
  "video_id": "DAVIS__night-race",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object B (dark sedan with green outline) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "question": "Over the sampled trajectory from F0 through F2, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (dark sedan with orange outline) or B (dark sedan with green outline)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "track_survival": [
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 {
  "qa_id": "DAVIS__paragliding-launch__camera_view_direction_change__00",
  "video_id": "DAVIS__paragliding-launch",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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  "frame_indices": [
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 {
  "qa_id": "DAVIS__paragliding-launch__object_world_motion_direction__01",
  "video_id": "DAVIS__paragliding-launch",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F8, in which dominant direction did object A (person in dark flight suit and helmet paragliding) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 },
 {
  "qa_id": "DAVIS__scooter-black__camera_view_direction_change__00",
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  "qa_id": "DAVIS__stroller__camera_object_distance_change__01",
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 {
  "qa_id": "DAVIS__stroller__camera_object_distance_change__02",
  "video_id": "DAVIS__stroller",
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  "qa_id": "DAVIS__stunt__camera_view_direction_change__00",
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  "qa_id": "DAVIS__stunt__camera_object_distance_change__01",
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  "qa_id": "DAVIS__tractor-sand__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F2 to F7, in which dominant direction did object A (person riding a small tracked vehicle) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "DAVIS__train__camera_translation_direction__00",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "A": "grey toy train car with a flat roof",
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 {
  "qa_id": "MOSE__028f6f64__camera_translation_direction__00",
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "MOSE__02deca50__camera_view_direction_change__00",
  "video_id": "MOSE__02deca50",
  "task": "camera_view_direction_change",
  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
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   "up",
   "right",
   "down"
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  "frame_indices": [
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  "target_mapping": {
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "MOSE__02deca50__object_world_motion_direction__01",
  "video_id": "MOSE__02deca50",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (zebra on the right with head lowered) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "up",
   "forward",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "MOSE__02deca50__object_world_motion_direction__02",
  "video_id": "MOSE__02deca50",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object B (zebra on the left with head raised) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "right",
   "up",
   "forward",
   "left",
   "backward"
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    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
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  "target_mapping": {
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   "min_intervals": 2,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "MOSE__033333fd__object_world_motion_direction__01",
  "video_id": "MOSE__033333fd",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object B (smaller juvenile elephant walking alongside the adult) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "left",
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    "released_frame_index": 37,
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    "normalized_time": 0.7551020408163265,
    "image_path": "cases/MOSE__033333fd/rgb_6.jpg"
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  "target_mapping": {
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "travel_max_min": 0.2,
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   "min_mask_pixels": 150,
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "MOSE__03c99e83__camera_view_direction_change__00",
  "video_id": "MOSE__03c99e83",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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   "down",
   "up"
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  "answer_index": 0,
  "frame_indices": [
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/MOSE__03c99e83/rgb_0.jpg"
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   {
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    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__03c99e83/rgb_8.jpg"
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  "target_mapping": {
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   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "MOSE__03e0f9b8__camera_translation_direction__00",
  "video_id": "MOSE__03e0f9b8",
  "task": "camera_translation_direction",
  "question": "From F1 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "backward",
   "down",
   "forward",
   "up",
   "left"
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  "frame_indices": [
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    "released_frame_name": "00007.jpg",
    "normalized_time": 0.13636363636363635,
    "image_path": "cases/MOSE__03e0f9b8/rgb_1.jpg"
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   {
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    "released_frame_index": 16,
    "released_frame_name": "00017.jpg",
    "normalized_time": 0.36363636363636365,
    "image_path": "cases/MOSE__03e0f9b8/rgb_3.jpg"
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  "target_mapping": {
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "MOSE__03e0f9b8__object_pair_distance_change__01",
  "video_id": "MOSE__03e0f9b8",
  "task": "object_pair_distance_change",
  "question": "From F2 to F4, did the 3D distance between object A (orange fish with a prominent head bump) and object B (small yellowish fish near the gravel) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
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  "answer_index": 1,
  "frame_indices": [
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  "frame_references": [
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    "image_path": "cases/MOSE__03e0f9b8/rgb_2.jpg"
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   {
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    "released_frame_index": 22,
    "released_frame_name": "00023.jpg",
    "normalized_time": 0.5,
    "image_path": "cases/MOSE__03e0f9b8/rgb_4.jpg"
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  "object_ids": [
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  "target_mapping": {
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   "A": "orange fish with a prominent head bump",
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "qa_id": "MOSE__04ae7a6b__camera_translation_direction__00",
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  "qa_id": "MOSE__05ed1023__object_pair_distance_change__00",
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  "question": "After compensating for camera motion from F2 to F7, in which dominant direction did object A (orange and yellow box truck) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "question": "From F2 to F7, did object B (dark grey suv) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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  "qa_id": "MOSE__0ba9c5ad__object_pair_distance_change__02",
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  "qa_id": "MOSE__0d4feda2__camera_translation_direction__00",
  "video_id": "MOSE__0d4feda2",
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  "question": "From F3 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__0e05fabe__camera_object_distance_change__00",
  "video_id": "MOSE__0e05fabe",
  "task": "camera_object_distance_change",
  "question": "From F1 to F3, did object A (person in purple jacket and orange helmet riding a white scooter) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
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  "video_id": "MOSE__100f6ecf",
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  "options": [
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    "travel_ratio": 39.75728910208836,
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   "initial_track_counts": [
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   "track_survival": [
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "MOSE__111e0a5c__camera_view_direction_change__00",
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  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "down"
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  "qa_id": "MOSE__111e0a5c__object_world_motion_direction__01",
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  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (zebra walking to the right) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__111e0a5c__object_world_motion_direction__02",
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  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object B (zebra walking to the right) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "qa_id": "MOSE__12a42fd9__camera_translation_direction__00",
  "video_id": "MOSE__12a42fd9",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__12a42fd9__camera_object_distance_change__01",
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  "question": "From F0 to F8, did object A (man in grey plaid suit) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "min_intervals": 2,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "group": "HLL",
  "manual_review": false
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 {
  "qa_id": "MOSE__12a42fd9__camera_object_distance_change__02",
  "video_id": "MOSE__12a42fd9",
  "task": "camera_object_distance_change",
  "question": "From F0 to F8, did object B (person in pink shirt and black pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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   "farther"
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  "frame_indices": [
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    "image_path": "cases/MOSE__12a42fd9/rgb_8.jpg"
   }
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  "target_mapping": {
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  },
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   "A": "man in grey plaid suit",
   "B": "person in pink shirt and black pants"
  },
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   "object_translation": 0.1,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "MOSE__12a5d0d7__camera_translation_direction__00",
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   "down",
   "forward"
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  "frame_indices": [
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    "image_path": "cases/MOSE__12a5d0d7/rgb_8.jpg"
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  "qa_id": "MOSE__12e509c2__camera_object_distance_change__00",
  "video_id": "MOSE__12e509c2",
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  "question": "From F4 to F8, did object A (white and tan dog with a fluffy tail) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
  "qa_id": "MOSE__12fdc864__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F4 to F8, in which dominant direction did object A (zebra standing on the right side of the waterhole) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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   "forward"
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    "image_path": "cases/MOSE__12fdc864/rgb_8.jpg"
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  "question": "From F4 to F8, did the 3D distance between object A (zebra standing on the right side of the waterhole) and object B (zebra standing in the water on the left side) increase or decrease? Compare their separation at the two specified frames.",
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   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "direction_dominance": 2.0,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "quality_status": "provisional_automated_pass",
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 },
 {
  "qa_id": "MOSE__138c81fe__camera_view_direction_change__00",
  "video_id": "MOSE__138c81fe",
  "task": "camera_view_direction_change",
  "question": "From F3 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
  "answer": "right",
  "options": [
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHH",
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 },
 {
  "qa_id": "MOSE__13e6df75__camera_object_distance_change__00",
  "video_id": "MOSE__13e6df75",
  "task": "camera_object_distance_change",
  "question": "From F4 to F6, did object A (black sedan) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
   "closer",
   "farther"
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  "answer_index": 0,
  "frame_indices": [
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 {
  "qa_id": "MOSE__13f0606c__camera_view_direction_change__00",
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 {
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 {
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 {
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 {
  "qa_id": "MOSE__265a69f4__camera_translation_direction__00",
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  "video_id": "MOSE__277ad883",
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 },
 {
  "qa_id": "MOSE__2883ae72__object_travel_distance_comparison__01",
  "video_id": "MOSE__2883ae72",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F6 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in blue uniform holding a panda) or B (panda cub on the ground)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "A",
  "options": [
   "B",
   "A"
  ],
  "answer_index": 1,
  "frame_indices": [
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   7,
   8
  ],
  "frame_references": [
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    "image_path": "cases/MOSE__2883ae72/rgb_6.jpg"
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    "released_frame_index": 16,
    "released_frame_name": "00017.jpg",
    "normalized_time": 0.8888888888888888,
    "image_path": "cases/MOSE__2883ae72/rgb_7.jpg"
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    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__2883ae72/rgb_8.jpg"
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  "object_ids": [
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   "g3"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "person in blue uniform holding a panda",
   "B": "panda cub on the ground"
  },
  "evidence": {
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     0.509675920009613,
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    "distance_change_depths": 0.18527022004127502,
    "relative_distance_change": 0.42545468033977313,
    "travel_a_depths": 0.24211537837982178,
    "travel_b_depths": 0.021367719396948814,
    "travel_gap_depths": 0.22074765898287296,
    "travel_ratio": 11.33089469596809,
    "distance_change_bootstrap95": [
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    "travel_a_minus_b_bootstrap95": [
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   "record_key": "MOSE__2883ae72__g1_g3__F6-F8",
   "anchors_a": [
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     -0.08868367969989777,
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     -0.045561783015728,
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   "track_counts": [
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    87
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   "initial_track_counts": [
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    256
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
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 {
  "qa_id": "MOSE__28980657__object_world_motion_direction__00",
  "video_id": "MOSE__28980657",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (orange tabby cat with a green collar) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "backward",
   "right",
   "left",
   "up",
   "forward",
   "down"
  ],
  "answer_index": 2,
  "frame_indices": [
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   8
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    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/MOSE__28980657/rgb_6.jpg"
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__28980657/rgb_8.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "orange tabby cat with a green collar",
   "B": "tracked object [g2]"
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "MOSE__291d4799__object_world_motion_direction__00",
  "video_id": "MOSE__291d4799",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F5, in which dominant direction did object B (zebra running through the water) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "left",
   "down",
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  "frame_indices": [
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    "released_frame_name": "00013.jpg",
    "normalized_time": 0.6,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 },
 {
  "qa_id": "MOSE__2ab9ba0f__object_world_motion_direction__00",
  "video_id": "MOSE__2ab9ba0f",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object B (grey remote-controlled fighter jet model with twin vertical tails and a star decal on the wing) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "backward",
   "left",
   "forward",
   "down",
   "right"
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  "frame_indices": [
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    "released_frame_index": 17,
    "released_frame_name": "00018.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__2ab9ba0f/rgb_8.jpg"
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  "target_mapping": {
   "A": "g2",
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   "A": "tracked object [g2]",
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   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 },
 {
  "qa_id": "MOSE__2bd4e845__object_pair_distance_change__00",
  "video_id": "MOSE__2bd4e845",
  "task": "object_pair_distance_change",
  "question": "From F1 to F3, did the 3D distance between object A (pink fish with red speckles) and object B (dark reddish-brown fish) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
  "options": [
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  "answer_index": 0,
  "frame_indices": [
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    "normalized_time": 0.3673469387755102,
    "image_path": "cases/MOSE__2bd4e845/rgb_3.jpg"
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   "B": "g3"
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   "A": "pink fish with red speckles",
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    "travel_gap_depths": 0.002826184034347534,
    "travel_ratio": 1.0288933782212402,
    "distance_change_bootstrap95": [
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   "record_key": "MOSE__2bd4e845__g2_g3__F1-F3",
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    [
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     -0.16688284277915955,
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    [
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   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "MOSE__2d3b0320__camera_translation_direction__00",
  "video_id": "MOSE__2d3b0320",
  "task": "camera_translation_direction",
  "question": "From F0 to F2, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "down",
   "up",
   "left",
   "right",
   "backward",
   "forward"
  ],
  "answer_index": 3,
  "frame_indices": [
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   {
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/MOSE__2d3b0320/rgb_0.jpg"
   },
   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/MOSE__2d3b0320/rgb_2.jpg"
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  ],
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "tracked object [g1]"
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  "evidence": {
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "direction_dominance": 2.0,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 {
  "qa_id": "MOSE__2d403c59__object_world_motion_direction__00",
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  "qa_id": "MOSE__2ea465de__camera_object_distance_change__00",
  "video_id": "MOSE__2ea465de",
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 {
  "qa_id": "MOSE__2ea465de__object_travel_distance_comparison__02",
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 {
  "qa_id": "MOSE__34ccea00__object_travel_distance_comparison__03",
  "video_id": "MOSE__34ccea00",
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "MOSE__3592425a__camera_view_direction_change__00",
  "video_id": "MOSE__3592425a",
  "task": "camera_view_direction_change",
  "question": "From F4 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
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  "qa_id": "MOSE__3592425a__object_world_motion_direction__01",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (large flat fish with a mottled grey and white pattern resting on the rocks) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "MOSE__37549a79__object_world_motion_direction__00",
  "video_id": "MOSE__37549a79",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object A (black bull with white markings on its back) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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  "qa_id": "MOSE__376dd830__camera_translation_direction__00",
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  "question": "From F2 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__37af9ac1__object_world_motion_direction__00",
  "video_id": "MOSE__37af9ac1",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object A (black and white chicken with a red comb) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "down",
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 {
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  "task": "object_pair_distance_change",
  "question": "From F0 to F2, did the 3D distance between object A (motocross rider in blue and white gear on a white dirt bike) and object B (motocross rider in black and yellow gear on a white dirt bike) increase or decrease? Compare their separation at the two specified frames.",
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  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (Kunming Airlines airplane with a white fuselage and a blue tail featuring a gold logo) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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    "normalized_time": 1.0,
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  "qa_id": "MOSE__3d08dadd__camera_view_direction_change__00",
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  "question": "From F3 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
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  "qa_id": "MOSE__3d08dadd__object_world_motion_direction__01",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object A (light brown horse with a dark mane and tail) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__3d9a7023__object_world_motion_direction__00",
  "video_id": "MOSE__3d9a7023",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (yak with light brown and white fur) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 {
  "qa_id": "MOSE__3da63bd5__camera_translation_direction__00",
  "video_id": "MOSE__3da63bd5",
  "task": "camera_translation_direction",
  "question": "From F0 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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 {
  "qa_id": "MOSE__3da63bd5__object_world_motion_direction__01",
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   "forward"
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 {
  "qa_id": "MOSE__4023fc77__camera_view_direction_change__00",
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  "question": "From F0 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "MOSE__5411113f__camera_object_distance_change__01",
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  "question": "From F1 to F4, did object A (orange electric scooter with a purple patterned windbreaker quilt) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
  "qa_id": "MOSE__54364322__camera_object_distance_change__00",
  "video_id": "MOSE__54364322",
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   "record_key": "MOSE__54364322__g1_g2__F0-F2",
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  "question": "From F0 to F5, did object A (light brown bear cub) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "From F0 to F5, did the 3D distance between object A (light brown bear cub) and object B (dark brown bear cub) increase or decrease? Compare their separation at the two specified frames.",
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    "released_frame_index": 24,
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    "normalized_time": 0.8571428571428571,
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  "video_id": "MOSE__59750be4",
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  "question": "From F3 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "down",
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    "normalized_time": 0.375,
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    "released_frame_index": 48,
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    "normalized_time": 1.0,
    "image_path": "cases/MOSE__59750be4/rgb_8.jpg"
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  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
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    "normalized_time": 1.0,
    "image_path": "cases/MOSE__59750be4/rgb_8.jpg"
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  "target_mapping": {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "qa_id": "MOSE__5a723c30__camera_translation_direction__00",
  "video_id": "MOSE__5a723c30",
  "task": "camera_translation_direction",
  "question": "From F4 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "backward",
   "forward",
   "right",
   "down",
   "left"
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  "answer_index": 1,
  "frame_indices": [
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    "released_frame_index": 16,
    "released_frame_name": "00017.jpg",
    "normalized_time": 0.7272727272727273,
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  "target_mapping": {
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  "target_descriptions": {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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  "units": "sequence background depths, not meters",
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  "video_id": "MOSE__5a723c30",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (black horse with a light-colored halter) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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  "qa_id": "MOSE__5a92a0c1__camera_view_direction_change__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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   "right",
   "down",
   "left"
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 {
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  "answer": "increased",
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  "qa_id": "MOSE__5a92a0c1__object_travel_distance_comparison__02",
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  "question": "Over the sampled trajectory from F1 through F3, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (black cow with white patches on the belly and legs) or B (white cow with large black spots)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "qa_id": "MOSE__5ba84e3f__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F2 to F8, in which dominant direction did object A (puppy with light tan and white fur) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__5bc7ea74__object_world_motion_direction__00",
  "video_id": "MOSE__5bc7ea74",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F8, in which dominant direction did object A (white sedan) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__5bc7ea74__camera_object_distance_change__01",
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  "question": "After compensating for camera motion from F0 to F7, in which dominant direction did object A (large adult elephant walking on the road) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__5ff72128__object_world_motion_direction__00",
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 {
  "qa_id": "MOSE__63f138de__object_world_motion_direction__00",
  "video_id": "MOSE__63f138de",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object A (zebra with black and white stripes) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__63f138de__object_pair_distance_change__01",
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  "qa_id": "MOSE__65856fa0__object_pair_distance_change__05",
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 {
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  "video_id": "MOSE__68954daf",
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  "qa_id": "MOSE__6a428397__object_world_motion_direction__00",
  "video_id": "MOSE__6a428397",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (brown horse standing near a wooden post) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__6da17988__object_pair_distance_change__00",
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  "video_id": "MOSE__7040385d",
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   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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 {
  "qa_id": "MOSE__724cc810__object_world_motion_direction__00",
  "video_id": "MOSE__724cc810",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (person in orange life vest and blue helmet) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "down",
   "right",
   "backward",
   "forward"
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    "normalized_time": 1.0,
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  "qa_id": "MOSE__72b2b77d__camera_translation_direction__00",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object B (black chicken with white markings on the wing) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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    "image_path": "cases/MOSE__730bc486/rgb_5.jpg"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "MOSE__731149b3__camera_object_distance_change__00",
  "video_id": "MOSE__731149b3",
  "task": "camera_object_distance_change",
  "question": "From F6 to F8, did object A (red SUV) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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 {
  "qa_id": "MOSE__74107936__object_travel_distance_comparison__00",
  "video_id": "MOSE__74107936",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F1 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (adult tiger with orange and black stripes walking in the center) or B (tiger with orange and black stripes walking to the left of the central tiger)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "target_mapping": {
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 {
  "qa_id": "MOSE__79af6097__object_world_motion_direction__00",
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  "qa_id": "MOSE__7ade3068__camera_view_direction_change__00",
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  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object B (brown bull with a lighter underbelly) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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  "video_id": "MOSE__7ade3068",
  "task": "camera_object_distance_change",
  "question": "From F3 to F6, did object B (brown bull with a lighter underbelly) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
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 {
  "qa_id": "MOSE__857ddc6e__object_world_motion_direction__01",
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   "tracking": "RAFT-large 33 context frames",
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 },
 {
  "qa_id": "MOSE__857e375e__camera_view_direction_change__00",
  "video_id": "MOSE__857e375e",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "MOSE__8620c024__camera_translation_direction__00",
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 {
  "qa_id": "MOSE__8620c024__camera_object_distance_change__01",
  "video_id": "MOSE__8620c024",
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  "question": "From F0 to F4, did object A (man in white t-shirt and blue jeans) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "After compensating for camera motion from F0 to F7, in which dominant direction did object A (large adult elephant walking on the road) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "question": "After compensating for camera motion from F0 to F7, in which dominant direction did object B (smaller elephant walking behind the large adult) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "question": "From F2 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__9293b755__object_world_motion_direction__00",
  "video_id": "MOSE__9293b755",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F4, in which dominant direction did object A (person in blue shirt and black shorts) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "MOSE__9293b755__object_pair_distance_change__01",
  "video_id": "MOSE__9293b755",
  "task": "object_pair_distance_change",
  "question": "From F0 to F4, did the 3D distance between object A (person in blue shirt and black shorts) and object B (person in red shirt and black shorts) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
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  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "MOSE__94d3403a__object_world_motion_direction__01",
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  "qa_id": "MOSE__95215aa1__object_world_motion_direction__00",
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  "qa_id": "MOSE__95cf72d7__camera_translation_direction__00",
  "video_id": "MOSE__95cf72d7",
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  "question": "From F3 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "backward",
   "up"
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  "qa_id": "MOSE__95e24093__object_world_motion_direction__00",
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 {
  "qa_id": "MOSE__95e24093__object_world_motion_direction__01",
  "video_id": "MOSE__95e24093",
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  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object B (distant horse in background) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "question": "From F0 to F2, did object B (distant horse in background) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
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  "question": "Over the sampled trajectory from F0 through F2, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (solid brown horse) or B (distant horse in background)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "MOSE__97b0811e__camera_view_direction_change__00",
  "video_id": "MOSE__97b0811e",
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  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object A (large adult elephant walking to the right) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__97b0811e__object_travel_distance_comparison__06",
  "video_id": "MOSE__97b0811e",
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  "question": "Over the sampled trajectory from F3 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (large adult elephant walking to the right) or B (small juvenile elephant walking to the left)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "qa_id": "MOSE__a14de179__camera_translation_direction__00",
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  "qa_id": "MOSE__a4457543__object_world_motion_direction__01",
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 {
  "qa_id": "MOSE__a46b7b77__camera_view_direction_change__00",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
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  "video_id": "MOSE__a5f70ce7",
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  "question": "From F4 to F8, did object B (dark-shelled turtle with a patterned head and extended front flippers) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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  "frame_indices": [
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 {
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  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object B (dark brown bull with horns) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__a810399b__camera_translation_direction__00",
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  "question": "From F0 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__a810399b__object_world_motion_direction__01",
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 {
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (small white fish with orange fins) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F4, in which dominant direction did object A (motocross rider in orange jersey with number 8) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "MOSE__bbe97d18__camera_translation_direction__00",
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  "task": "camera_translation_direction",
  "question": "From F4 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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   "up",
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  "frame_indices": [
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    "normalized_time": 0.4897959183673469,
    "image_path": "cases/MOSE__bbe97d18/rgb_4.jpg"
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    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/MOSE__bbe97d18/rgb_7.jpg"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "seed_count": 256,
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  "qa_id": "MOSE__bcb6e338__object_world_motion_direction__00",
  "video_id": "MOSE__bcb6e338",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (long dark wooden boat with a roof) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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   "down",
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  "frame_indices": [
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    "released_frame_name": "00027.jpg",
    "normalized_time": 0.6341463414634146,
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   {
    "frame_index": 8,
    "released_frame_index": 41,
    "released_frame_name": "00042.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__bcb6e338/rgb_8.jpg"
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "MOSE__beb693c9__camera_view_direction_change__00",
  "video_id": "MOSE__beb693c9",
  "task": "camera_view_direction_change",
  "question": "From F4 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
  "answer": "left",
  "options": [
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   "up"
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  "answer_index": 1,
  "frame_indices": [
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    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/MOSE__beb693c9/rgb_4.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__beb693c9/rgb_8.jpg"
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  "target_mapping": {
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 {
  "qa_id": "MOSE__beb693c9__object_world_motion_direction__01",
  "video_id": "MOSE__beb693c9",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F8, in which dominant direction did object A (large blue and white ferry with 'HELLENIC SEAFARER' text on the hull) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "up",
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   "forward",
   "down",
   "right",
   "left"
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  "answer_index": 1,
  "frame_indices": [
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    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/MOSE__beb693c9/rgb_4.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__beb693c9/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
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 {
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  "qa_id": "MOSE__c4aa176c__camera_translation_direction__00",
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 {
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 {
  "qa_id": "MOSE__c8f0fd41__camera_translation_direction__00",
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  "qa_id": "MOSE__c9351029__camera_view_direction_change__00",
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  "question": "After compensating for camera motion from F0 to F6, in which dominant direction did object B (small juvenile elephant walking on the road) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "question": "From F0 to F3, did object A (white minivan) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
  "qa_id": "MOSE__d262b7e4__camera_object_distance_change__02",
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  "question": "From F0 to F3, did object B (black compact suv) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
  "qa_id": "MOSE__d904c048__object_travel_distance_comparison__02",
  "video_id": "MOSE__d904c048",
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  "question": "Over the sampled trajectory from F1 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (orange fish with a rounded body and prominent eye) or B (small yellowish-orange fish near the gravel substrate)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
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  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (elephant lying down in the foreground) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "qa_id": "MOSE__da5e4bc5__object_world_motion_direction__01",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object B (elephant standing on the right side) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__dae93f5c__camera_translation_direction__00",
  "video_id": "MOSE__dae93f5c",
  "task": "camera_translation_direction",
  "question": "From F2 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "left",
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   "up",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "MOSE__dae93f5c__object_world_motion_direction__01",
  "video_id": "MOSE__dae93f5c",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object B (orange fish located in the upper right area of the tank) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "forward",
   "down",
   "up",
   "backward",
   "left"
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  "frame_indices": [
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 {
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  "question": "Over the sampled trajectory from F3 through F6, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (orange fish with a prominent head bump, positioned near the bottom gravel) or B (orange fish located in the upper right area of the tank)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   6
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "MOSE__dafeb75e__camera_object_distance_change__00",
  "video_id": "MOSE__dafeb75e",
  "task": "camera_object_distance_change",
  "question": "From F1 to F6, did object A (dark-shelled turtle with patterned skin on the head and flippers) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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 {
  "qa_id": "MOSE__dafeb75e__object_world_motion_direction__01",
  "video_id": "MOSE__dafeb75e",
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  "question": "After compensating for camera motion from F1 to F6, in which dominant direction did object B (dark-shelled turtle swimming in the background) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 {
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 },
 {
  "qa_id": "MOSE__dbbbb401__camera_translation_direction__00",
  "video_id": "MOSE__dbbbb401",
  "task": "camera_translation_direction",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "MOSE__dc54aab2__object_world_motion_direction__00",
  "video_id": "MOSE__dc54aab2",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F8, in which dominant direction did object A (black racing motorcycle with number 13, ridden by a person in a white and black suit) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "up",
   "down",
   "backward",
   "left",
   "right"
  ],
  "answer_index": 3,
  "frame_indices": [
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   8
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   {
    "frame_index": 8,
    "released_frame_index": 11,
    "released_frame_name": "00012.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__dc54aab2/rgb_8.jpg"
   }
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  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g2",
   "B": "g4"
  },
  "target_descriptions": {
   "A": "black racing motorcycle with number 13, ridden by a person in a white and black suit",
   "B": "tracked object [g4]"
  },
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 },
 {
  "qa_id": "MOSE__dd5a4739__object_world_motion_direction__00",
  "video_id": "MOSE__dd5a4739",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (ram with curved horns) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "backward",
   "forward",
   "left",
   "down",
   "right",
   "up"
  ],
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  "frame_indices": [
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   8
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/MOSE__dd5a4739/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 47,
    "released_frame_name": "00048.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__dd5a4739/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g3"
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  "target_mapping": {
   "A": "g3",
   "B": "g4"
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  "target_descriptions": {
   "A": "ram with curved horns",
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "MOSE__ddbdfa32__object_world_motion_direction__00",
  "video_id": "MOSE__ddbdfa32",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (person in orange jacket) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "backward",
   "left",
   "forward",
   "up",
   "down",
   "right"
  ],
  "answer_index": 2,
  "frame_indices": [
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   3
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/MOSE__ddbdfa32/rgb_0.jpg"
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   {
    "frame_index": 3,
    "released_frame_index": 10,
    "released_frame_name": "00011.jpg",
    "normalized_time": 0.35714285714285715,
    "image_path": "cases/MOSE__ddbdfa32/rgb_3.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in orange jacket"
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   "displacement_start_camera_depths": [
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
  "manual_review": false
 },
 {
  "qa_id": "MOSE__dde85a9d__object_world_motion_direction__00",
  "video_id": "MOSE__dde85a9d",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F7, in which dominant direction did object A (large adult elephant with visible tusks walking on the road) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "backward",
   "right",
   "forward",
   "down",
   "up",
   "left"
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  "answer_index": 5,
  "frame_indices": [
   0,
   7
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  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/MOSE__dde85a9d/rgb_0.jpg"
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   {
    "frame_index": 7,
    "released_frame_index": 26,
    "released_frame_name": "00027.jpg",
    "normalized_time": 0.8666666666666667,
    "image_path": "cases/MOSE__dde85a9d/rgb_7.jpg"
   }
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  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "large adult elephant with visible tusks walking on the road",
   "B": "tracked object [g2]"
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  "evidence": {
   "displacement_start_camera_depths": [
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    -0.0005418213902473437,
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   "dominant_component_bootstrap95": [
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    -0.19308885338482
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "MOSE__e147ab26__object_pair_distance_change__00",
  "video_id": "MOSE__e147ab26",
  "task": "object_pair_distance_change",
  "question": "From F5 to F8, did the 3D distance between object A (zebra standing in the grass) and object B (small brown canid standing in the grass) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
   "increased",
   "decreased"
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  "answer_index": 1,
  "frame_indices": [
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   8
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  "frame_references": [
   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/MOSE__e147ab26/rgb_5.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__e147ab26/rgb_8.jpg"
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  "object_ids": [
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   "g5"
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  "target_mapping": {
   "A": "g2",
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  "target_descriptions": {
   "A": "zebra standing in the grass",
   "B": "small brown canid standing in the grass"
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  "evidence": {
   "metrics": {
    "distance_depths": [
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    "distance_change_depths": -0.11389847099781036,
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    "travel_a_depths": 0.12163197994232178,
    "travel_b_depths": 0.0040514664724469185,
    "travel_gap_depths": 0.11758051346987486,
    "travel_ratio": 30.021717017655853,
    "distance_change_bootstrap95": [
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     -0.11084980815649033
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    "travel_a_minus_b_bootstrap95": [
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   },
   "record_key": "MOSE__e147ab26__g2_g5__F5-F8",
   "anchors_a": [
    [
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     -0.021532580256462097,
     1.0805222988128662
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    [
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     -0.018628280609846115,
     1.0584040880203247
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    [
     -0.008700773119926453,
     -0.010008322075009346,
     1.0185894966125488
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    [
     -0.02674764394760132,
     -0.008279206231236458,
     0.9733377695083618
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   "anchors_b": [
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    [
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    [
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    [
     -0.01602347381412983,
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   ],
   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "MOSE__e18723c4__object_world_motion_direction__00",
  "video_id": "MOSE__e18723c4",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (motorcyclist in white and black racing suit with red and black helmet, riding a black and yellow bike) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "forward",
   "up",
   "down",
   "backward",
   "left",
   "right"
  ],
  "answer_index": 3,
  "frame_indices": [
   5,
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  "frame_references": [
   {
    "frame_index": 5,
    "released_frame_index": 9,
    "released_frame_name": "00010.jpg",
    "normalized_time": 0.6428571428571429,
    "image_path": "cases/MOSE__e18723c4/rgb_5.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 14,
    "released_frame_name": "00015.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/MOSE__e18723c4/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g3",
   "B": "g4"
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  "target_descriptions": {
   "A": "motorcyclist in white and black racing suit with red and black helmet, riding a black and yellow bike",
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  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 },
 {
  "qa_id": "MOSE__e1d9fb32__object_world_motion_direction__00",
  "video_id": "MOSE__e1d9fb32",
  "task": "object_world_motion_direction",
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   "down",
   "right",
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  "qa_id": "MOSE__e35a8262__object_world_motion_direction__00",
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 {
  "qa_id": "MOSE__e3dcd186__object_world_motion_direction__00",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object B (orange and white goldfish with yellow head) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 43,
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 {
  "qa_id": "MOSE__e495537a__camera_object_distance_change__00",
  "video_id": "MOSE__e495537a",
  "task": "camera_object_distance_change",
  "question": "From F0 to F7, did object B (large dark barge in the foreground) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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  "frame_indices": [
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 {
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  "video_id": "MOSE__e495537a",
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  "question": "Over the sampled trajectory from F0 through F7, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (orange boat in the distance) or B (large dark barge in the foreground)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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    "image_path": "cases/MOSE__e495537a/rgb_7.jpg"
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 {
  "qa_id": "MOSE__e607450d__object_world_motion_direction__00",
  "video_id": "MOSE__e607450d",
  "task": "object_world_motion_direction",
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 {
  "qa_id": "MOSE__f0b922bf__object_world_motion_direction__00",
  "video_id": "MOSE__f0b922bf",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object A (white scooter with rider in black jacket and white helmet) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "down",
   "up",
   "right",
   "forward",
   "backward"
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  "frame_indices": [
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   3
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   "object_translation": 0.1,
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  "units": "sequence background depths, not meters",
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  "qa_id": "MOSE__f0b922bf__camera_object_distance_change__01",
  "video_id": "MOSE__f0b922bf",
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  "question": "From F1 to F3, did object A (white scooter with rider in black jacket and white helmet) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   3
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  "video_id": "MOSE__f0b922bf",
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  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object B (red scooter with rider in dark clothing and white helmet) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__f0b922bf__object_travel_distance_comparison__04",
  "video_id": "MOSE__f0b922bf",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F1 through F3, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (white scooter with rider in black jacket and white helmet) or B (red scooter with rider in dark clothing and white helmet)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "MOSE__f22c39ce__object_world_motion_direction__00",
  "video_id": "MOSE__f22c39ce",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F4, in which dominant direction did object B (small elephant walking on the road) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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   "up"
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 {
  "qa_id": "MOSE__f4c4a2ca__camera_translation_direction__00",
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 {
  "qa_id": "MOSE__f521e3c5__camera_translation_direction__00",
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 {
  "qa_id": "MOSE__f521e3c5__camera_object_distance_change__02",
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  "question": "From F0 to F8, did object B (man in maroon traditional robe) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "options": [
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 {
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 {
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  "qa_id": "MOSE__f7935d24__camera_translation_direction__00",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "MOSE__f7935d24__camera_object_distance_change__01",
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  "question": "From F1 to F3, did object A (human arm reaching towards the cats) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "video_id": "MVS-Synth__0118",
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  "question": "From F1 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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  "question": "From F4 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
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  "qa_id": "SAV__sav_000840_manual__camera_object_distance_change__02",
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  "video_id": "SAV__sav_016304_manual",
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  "question": "Over the sampled trajectory from F2 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in white tank top and blue shorts) or B (white shirt hanging on a clothesline)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "question": "From F1 to F7, did object A (man in light grey shirt and khaki pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "qa_id": "SAV__sav_016433_manual__camera_translation_direction__00",
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 {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "SAV__sav_017357_manual__camera_view_direction_change__00",
  "video_id": "SAV__sav_017357_manual",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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  "frame_indices": [
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "video_id": "SAV__sav_017917_manual",
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  "question": "After compensating for camera motion from F1 to F8, in which dominant direction did object A (boy in blue plaid shirt) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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  "question": "From F1 to F8, did object A (boy in blue plaid shirt) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object B (person in blue shirt and dark pants) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "video_id": "SAV__sav_018148_manual",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "down"
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    "released_frame_name": "00001.png",
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    "released_frame_index": 37,
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   "min_intervals": 2,
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   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
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   "seed_count": 256,
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    "released_frame_index": 18,
    "released_frame_name": "00019.png",
    "normalized_time": 0.3673469387755102,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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   "down",
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.png",
    "normalized_time": 1.0,
    "image_path": "cases/SAV__sav_018431_manual/rgb_8.jpg"
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "question": "From F0 to F2, did object A (person in dark clothing) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "released_frame_name": "00013.png",
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "qa_id": "SAV__sav_018658_manual__camera_object_distance_change__00",
  "video_id": "SAV__sav_018658_manual",
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  "question": "From F5 to F8, did object A (small orange balance bike) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "SAV__sav_020074_manual__object_pair_distance_change__02",
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    "normalized_time": 1.0,
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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   "up",
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   "down",
   "backward"
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  "frame_indices": [
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    "released_frame_name": "00019.png",
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   "max_pair_mask_overlap": 0.05,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "qa_id": "SAV__sav_021874_manual__camera_translation_direction__00",
  "video_id": "SAV__sav_021874_manual",
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  "question": "From F3 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "up",
   "left",
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   "down"
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    "released_frame_index": 43,
    "released_frame_name": "00044.png",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/SAV__sav_021874_manual/rgb_7.jpg"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "SAV__sav_021976_manual__camera_view_direction_change__00",
  "video_id": "SAV__sav_021976_manual",
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  "question": "From F2 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
  "answer": "left",
  "options": [
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    "normalized_time": 0.8775510204081632,
    "image_path": "cases/SAV__sav_021976_manual/rgb_7.jpg"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 {
  "qa_id": "SAV__sav_021976_manual__camera_object_distance_change__01",
  "video_id": "SAV__sav_021976_manual",
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  "question": "From F2 to F7, did object A (tan and white dog with a blue collar) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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 {
  "qa_id": "SAV__sav_022075_manual__object_world_motion_direction__00",
  "video_id": "SAV__sav_022075_manual",
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  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (person wearing a patterned short-sleeve shirt and blue jeans) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "seed_count": 256,
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  "qa_id": "SAV__sav_022075_manual__camera_object_distance_change__01",
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  "qa_id": "SAV__sav_022166_manual__camera_translation_direction__00",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "SAV__sav_022166_manual__object_world_motion_direction__02",
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (man in plaid shirt and jeans) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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    "normalized_time": 1.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "SAV__sav_022570_manual__camera_view_direction_change__00",
  "video_id": "SAV__sav_022570_manual",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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   "down"
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  "answer_index": 1,
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "SAV__sav_024015_manual__object_travel_distance_comparison__04",
  "video_id": "SAV__sav_024015_manual",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F2 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (child in beige puffy jacket and dark pants) or B (person in black jacket walking in the background)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "options": [
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  "frame_indices": [
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   3,
   4
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    "released_frame_index": 18,
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  "target_mapping": {
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    "travel_b_depths": 0.46817734837532043,
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   "initial_track_counts": [
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "SAV__sav_024144_manual__camera_translation_direction__00",
  "video_id": "SAV__sav_024144_manual",
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  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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   "left",
   "up",
   "down"
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  "frame_indices": [
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    "released_frame_index": 49,
    "released_frame_name": "00050.png",
    "normalized_time": 1.0,
    "image_path": "cases/SAV__sav_024144_manual/rgb_8.jpg"
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  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
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    "image_path": "cases/SAV__sav_024144_manual/rgb_8.jpg"
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 {
  "qa_id": "SAV__sav_024144_manual__object_world_motion_direction__02",
  "video_id": "SAV__sav_024144_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (person in black clothing) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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   "backward",
   "down",
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    "released_frame_index": 49,
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    "normalized_time": 1.0,
    "image_path": "cases/SAV__sav_024144_manual/rgb_8.jpg"
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "SAV__sav_024144_manual__camera_object_distance_change__03",
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  "question": "From F5 to F8, did object A (person in black clothing) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "SAV__sav_024262_manual__camera_translation_direction__00",
  "video_id": "SAV__sav_024262_manual",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 {
  "qa_id": "SAV__sav_024262_manual__object_world_motion_direction__01",
  "video_id": "SAV__sav_024262_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (red and white bumper car with a star decal and the number 91 on the back) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "up",
   "backward",
   "down",
   "forward",
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  "target_mapping": {
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  },
  "target_descriptions": {
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 {
  "qa_id": "SAV__sav_024262_manual__camera_object_distance_change__02",
  "video_id": "SAV__sav_024262_manual",
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "SAV__sav_024344_manual__object_world_motion_direction__00",
  "video_id": "SAV__sav_024344_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F5, in which dominant direction did object A (person in brown uniform carrying a white bucket on their head) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "question": "From F0 to F5, did object A (person in brown uniform carrying a white bucket on their head) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "SAV__sav_024421_manual__object_world_motion_direction__00",
  "video_id": "SAV__sav_024421_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object B (person in orange shirt) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "down",
   "backward",
   "right"
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  "answer_index": 4,
  "frame_indices": [
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    "released_frame_index": 49,
    "released_frame_name": "00050.png",
    "normalized_time": 1.0,
    "image_path": "cases/SAV__sav_024421_manual/rgb_8.jpg"
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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 {
  "qa_id": "SAV__sav_024544_manual__camera_translation_direction__00",
  "video_id": "SAV__sav_024544_manual",
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  "question": "From F5 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "left",
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   "forward",
   "down"
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  "frame_indices": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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 {
  "qa_id": "SAV__sav_024544_manual__camera_view_direction_change__01",
  "video_id": "SAV__sav_024544_manual",
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  "question": "From F5 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F5?",
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  "options": [
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 },
 {
  "qa_id": "SAV__sav_024544_manual__object_world_motion_direction__02",
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    "released_frame_index": 0,
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   {
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    "released_frame_index": 49,
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 {
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  "video_id": "SAV__sav_024821_manual",
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   "down"
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    "image_path": "cases/SAV__sav_024821_manual/rgb_8.jpg"
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   "seed_count": 256,
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 {
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 {
  "qa_id": "SAV__sav_025233_manual__camera_object_distance_change__00",
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  "question": "From F3 to F8, did object B (person in a grey shirt and dark pants carrying a yellow sack) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (person riding a scooter wearing an orange top) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "qa_id": "SAV__sav_025398_manual__camera_translation_direction__00",
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   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
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 {
  "qa_id": "SAV__sav_025398_manual__object_world_motion_direction__01",
  "video_id": "SAV__sav_025398_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F7, in which dominant direction did object A (maroon truck with 'Falcon' text on the rear) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "backward",
   "down",
   "left",
   "right",
   "forward"
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  "frame_indices": [
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   7
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   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.png",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/SAV__sav_025398_manual/rgb_7.jpg"
   }
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  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g3"
  },
  "target_descriptions": {
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   "min_bootstrap_direction_agreement": 0.95
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_ratio": 1.5,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "SAV__sav_025398_manual__camera_object_distance_change__02",
  "video_id": "SAV__sav_025398_manual",
  "task": "camera_object_distance_change",
  "question": "From F4 to F7, did object A (maroon truck with 'Falcon' text on the rear) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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   "closer"
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    "image_path": "cases/SAV__sav_025398_manual/rgb_4.jpg"
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    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.png",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/SAV__sav_025398_manual/rgb_7.jpg"
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   "A": "g3"
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "SAV__sav_025430_manual__camera_translation_direction__00",
  "video_id": "SAV__sav_025430_manual",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "left",
   "forward",
   "down",
   "backward"
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    "image_path": "cases/SAV__sav_025430_manual/rgb_0.jpg"
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.png",
    "normalized_time": 1.0,
    "image_path": "cases/SAV__sav_025430_manual/rgb_8.jpg"
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  "target_mapping": {
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 {
  "qa_id": "SAV__sav_025430_manual__object_world_motion_direction__01",
  "video_id": "SAV__sav_025430_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F8, in which dominant direction did object A (person in orange shirt) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "right",
   "forward",
   "backward",
   "left",
   "up",
   "down"
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  "frame_indices": [
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    "image_path": "cases/SAV__sav_025430_manual/rgb_4.jpg"
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.png",
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    "image_path": "cases/SAV__sav_025430_manual/rgb_8.jpg"
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   "A": "g1",
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   "A": "person in orange shirt",
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "sam_score": 0.8,
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   "min_forward_coverage": 0.25,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 {
  "qa_id": "SAV__sav_025430_manual__object_world_motion_direction__02",
  "video_id": "SAV__sav_025430_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F8, in which dominant direction did object B (person in black shirt) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "right",
   "up",
   "forward",
   "left",
   "down",
   "backward"
  ],
  "answer_index": 2,
  "frame_indices": [
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   8
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    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.png",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/SAV__sav_025430_manual/rgb_4.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.png",
    "normalized_time": 1.0,
    "image_path": "cases/SAV__sav_025430_manual/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "person in orange shirt",
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
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   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "SAV__sav_025430_manual__object_pair_distance_change__03",
  "video_id": "SAV__sav_025430_manual",
  "task": "object_pair_distance_change",
  "question": "From F4 to F8, did the 3D distance between object A (person in orange shirt) and object B (person in black shirt) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
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  "answer_index": 1,
  "frame_indices": [
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   8
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   {
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    "released_frame_index": 49,
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    "image_path": "cases/SAV__sav_025430_manual/rgb_8.jpg"
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   "record_key": "SAV__sav_025430_manual__g1_g2__F4-F8",
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   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "thresholds": {
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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 {
  "qa_id": "SAV__sav_025445_manual__object_world_motion_direction__00",
  "video_id": "SAV__sav_025445_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object A (toddler in yellow vest and grey pants) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "up",
   "right",
   "backward",
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    "frame_index": 2,
    "released_frame_index": 24,
    "released_frame_name": "00025.png",
    "normalized_time": 0.25,
    "image_path": "cases/SAV__sav_025445_manual/rgb_2.jpg"
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   "A": "g1"
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "SAV__sav_025459_manual__camera_translation_direction__00",
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  "frame_indices": [
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    "released_frame_index": 49,
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    "normalized_time": 1.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "video_id": "SAV__sav_025459_manual",
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   "up",
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    "frame_index": 5,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "SAV__sav_025517_manual__camera_object_distance_change__00",
  "video_id": "SAV__sav_025517_manual",
  "task": "camera_object_distance_change",
  "question": "From F5 to F7, did object A (person wearing a brown jacket) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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  "frame_indices": [
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  "answer": "increased",
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  "answer_index": 1,
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 {
  "qa_id": "SAV__sav_025550_manual__camera_object_distance_change__00",
  "video_id": "SAV__sav_025550_manual",
  "task": "camera_object_distance_change",
  "question": "From F0 to F6, did object A (person in black jacket and pants with a grey backpack) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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 {
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  "question": "After compensating for camera motion from F2 to F6, in which dominant direction did object B (taller person in grey shirt and dark pants) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "SAV__sav_025862_manual__object_world_motion_direction__00",
  "video_id": "SAV__sav_025862_manual",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (person in dark blue shirt and pants) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "question": "Over the sampled trajectory from F2 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in dark blue shirt and pants) or B (person in yellow shirt riding a bicycle)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "SAV__sav_026730_manual__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (yellow backhoe loader) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "SAV__sav_026780_manual__camera_translation_direction__00",
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 {
  "qa_id": "SAV__sav_026796_manual__camera_translation_direction__00",
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  "question": "From F5 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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   "down"
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  "qa_id": "SAV__sav_027897_manual__camera_view_direction_change__00",
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  "qa_id": "SAV__sav_027897_manual__object_world_motion_direction__01",
  "video_id": "SAV__sav_027897_manual",
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (yellow wheel loader) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 49,
    "released_frame_name": "00050.png",
    "normalized_time": 1.0,
    "image_path": "cases/SAV__sav_028284_manual/rgb_8.jpg"
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  "qa_id": "SAV__sav_028490_manual__object_world_motion_direction__01",
  "video_id": "SAV__sav_028490_manual",
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  "question": "After compensating for camera motion from F0 to F6, in which dominant direction did object A (person in black coat carrying a large grey tote bag) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "backward",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "SAV__sav_028492_manual__camera_translation_direction__00",
  "video_id": "SAV__sav_028492_manual",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "video_id": "SAV__sav_029089_manual",
  "task": "object_world_motion_direction",
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   "left",
   "backward",
   "forward",
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  "question": "From F0 to F5, did object A (black bag with white trim) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "normalized_time": 0.3673469387755102,
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  "target_mapping": {
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   "B": "g3"
  },
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   "B": "person wearing a grey shirt"
  },
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "VOST__1008_peel_cabbage__camera_translation_direction__00",
  "video_id": "VOST__1008_peel_cabbage",
  "task": "camera_translation_direction",
  "question": "From F1 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "forward",
   "down",
   "right"
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    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__1008_peel_cabbage/rgb_4.jpg"
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 },
 {
  "qa_id": "VOST__10343_smooth_wood__camera_object_distance_change__00",
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  "question": "From F3 to F7, did object B (person's left arm wearing a blue glove and a red wristband) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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 {
  "qa_id": "VOST__10364_grate_carrot__camera_translation_direction__00",
  "video_id": "VOST__10364_grate_carrot",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "up",
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 {
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (left arm of a person wearing a white t-shirt) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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   "left"
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 {
  "qa_id": "VOST__10364_grate_carrot__object_pair_distance_change__02",
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  "question": "From F6 to F8, did the 3D distance between object A (left arm of a person wearing a white t-shirt) and object B (right arm and torso of a person wearing a white t-shirt) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
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   "record_key": "VOST__10364_grate_carrot__g2_g3__F6-F8",
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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 },
 {
  "qa_id": "VOST__10364_grate_carrot__object_travel_distance_comparison__03",
  "video_id": "VOST__10364_grate_carrot",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F6 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (left arm of a person wearing a white t-shirt) or B (right arm and torso of a person wearing a white t-shirt)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "A",
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   "A"
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    "normalized_time": 0.8775510204081632,
    "image_path": "cases/VOST__10364_grate_carrot/rgb_7.jpg"
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    "image_path": "cases/VOST__10364_grate_carrot/rgb_8.jpg"
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 {
  "qa_id": "VOST__10379_sand_wood__camera_translation_direction__00",
  "video_id": "VOST__10379_sand_wood",
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  "question": "From F0 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "down",
   "up",
   "backward",
   "right",
   "forward"
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  "frame_indices": [
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   "B": "person wearing blue and white checkered shorts"
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 {
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  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (right arm wearing a blue nitrile glove) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 },
 {
  "qa_id": "VOST__10698_cut_paper__camera_translation_direction__00",
  "video_id": "VOST__10698_cut_paper",
  "task": "camera_translation_direction",
  "question": "From F0 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "down",
   "left",
   "right",
   "backward"
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 {
  "qa_id": "VOST__1456_cut_carrot__camera_translation_direction__00",
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__2539_mix_biscuit__camera_translation_direction__00",
  "video_id": "VOST__2539_mix_biscuit",
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  "question": "From F1 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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   "up"
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    "released_frame_index": 61,
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    "normalized_time": 0.6288659793814433,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "VOST__2596_mix_dough__camera_translation_direction__00",
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  "qa_id": "VOST__2731_scoop_vegetable__camera_translation_direction__00",
  "video_id": "VOST__2731_scoop_vegetable",
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  "answer": "left",
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  "question": "After compensating for camera motion from F0 to F4, in which dominant direction did object A (hand holding a utensil) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__2731_scoop_vegetable__object_world_motion_direction__02",
  "video_id": "VOST__2731_scoop_vegetable",
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  "question": "After compensating for camera motion from F0 to F4, in which dominant direction did object B (metal colander containing chopped green vegetables) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
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    "image_path": "cases/VOST__2731_scoop_vegetable/rgb_4.jpg"
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 {
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  "question": "Over the sampled trajectory from F0 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (hand holding a utensil) or B (metal colander containing chopped green vegetables)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
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   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "VOST__2765_scoop_jam__camera_translation_direction__00",
  "video_id": "VOST__2765_scoop_jam",
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  "question": "From F1 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "VOST__2788_scoop_jam__camera_translation_direction__00",
  "video_id": "VOST__2788_scoop_jam",
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  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 49,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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    "image_path": "cases/VOST__2788_scoop_jam/rgb_1.jpg"
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    "frame_index": 4,
    "released_frame_index": 24,
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    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__2788_scoop_jam/rgb_4.jpg"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "question": "From F1 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "backward",
   "right",
   "down",
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    "normalized_time": 0.125,
    "image_path": "cases/VOST__283_squeeze_lime/rgb_1.jpg"
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    "frame_index": 7,
    "released_frame_index": 98,
    "released_frame_name": "00099.jpg",
    "normalized_time": 0.875,
    "image_path": "cases/VOST__283_squeeze_lime/rgb_7.jpg"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__2840_scoop_food__camera_translation_direction__00",
  "video_id": "VOST__2840_scoop_food",
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  "question": "From F2 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "left",
   "up",
   "right",
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
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 {
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  "question": "Over the sampled trajectory from F3 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (left arm with a black watch) or B (right arm and lower body in dark pants)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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    "normalized_time": 0.7551020408163265,
    "image_path": "cases/VOST__3131_scrape_stirfry/rgb_6.jpg"
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    "released_frame_index": 43,
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    "normalized_time": 0.8775510204081632,
    "image_path": "cases/VOST__3131_scrape_stirfry/rgb_7.jpg"
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   {
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__3131_scrape_stirfry/rgb_8.jpg"
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   "track_counts": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__3135_scrape_pan__object_pair_distance_change__00",
  "video_id": "VOST__3135_scrape_pan",
  "task": "object_pair_distance_change",
  "question": "From F6 to F8, did the 3D distance between object A (person's arm and hand reaching to spread food) and object B (black frying pan containing cooked meat) increase or decrease? Compare their separation at the two specified frames.",
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    "released_frame_index": 49,
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    "image_path": "cases/VOST__3135_scrape_pan/rgb_8.jpg"
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 {
  "qa_id": "VOST__3150_peel_fish__object_travel_distance_comparison__00",
  "video_id": "VOST__3150_peel_fish",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F4 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person's left arm and hand) or B (black shirt with white floral pattern)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "VOST__3160_peel_banana__camera_translation_direction__00",
  "video_id": "VOST__3160_peel_banana",
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  "question": "From F2 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "VOST__3177_peel_peach__camera_translation_direction__00",
  "video_id": "VOST__3177_peel_peach",
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  "question": "From F1 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "VOST__3292_peel_garlic__camera_translation_direction__00",
  "video_id": "VOST__3292_peel_garlic",
  "task": "camera_translation_direction",
  "question": "From F1 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "up",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 },
 {
  "qa_id": "VOST__3295_break_garlic__camera_translation_direction__00",
  "video_id": "VOST__3295_break_garlic",
  "task": "camera_translation_direction",
  "question": "From F1 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "up",
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   "displacement_start_camera_depths": [
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    0.06600183975609802,
    -0.040027258574831505
   ],
   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__3317_peel_onion__camera_view_direction_change__01",
  "video_id": "VOST__3317_peel_onion",
  "task": "camera_view_direction_change",
  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "up",
  "options": [
   "up",
   "left",
   "right",
   "down"
  ],
  "answer_index": 0,
  "frame_indices": [
   0,
   5
  ],
  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/VOST__3317_peel_onion/rgb_0.jpg"
   },
   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__3317_peel_onion/rgb_5.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person wearing a black long-sleeved shirt, holding an onion and a knife",
   "B": "black t-shirt with white text and graphic print"
  },
  "evidence": {
   "yaw_deg": 1.5986962258426602,
   "pitch_deg": -17.091184675315535,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__3318_peel_potato__camera_translation_direction__00",
  "video_id": "VOST__3318_peel_potato",
  "task": "camera_translation_direction",
  "question": "From F1 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "forward",
   "right",
   "up",
   "left",
   "backward",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
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   4
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  "frame_references": [
   {
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/VOST__3318_peel_potato/rgb_1.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__3318_peel_potato/rgb_4.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person wearing a black shirt, visible from the chest up, with arms extended towards a cutting board",
   "B": "person wearing a black shirt, visible from the chest up, with arms extended towards a cutting board"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.002642047817044985
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__3318_peel_potato__object_world_motion_direction__01",
  "video_id": "VOST__3318_peel_potato",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object A (person wearing a black shirt, visible from the chest up, with arms extended towards a cutting board) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "up",
  "options": [
   "right",
   "backward",
   "left",
   "down",
   "forward",
   "up"
  ],
  "answer_index": 5,
  "frame_indices": [
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   2
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  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/VOST__3318_peel_potato/rgb_0.jpg"
   },
   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/VOST__3318_peel_potato/rgb_2.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person wearing a black shirt, visible from the chest up, with arms extended towards a cutting board",
   "B": "person wearing a black shirt, visible from the chest up, with arms extended towards a cutting board"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.0281849240624318
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   "dominant_component_bootstrap95": [
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    -0.21259220259079709
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__3321_peel_onion__camera_translation_direction__00",
  "video_id": "VOST__3321_peel_onion",
  "task": "camera_translation_direction",
  "question": "From F0 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "backward",
   "forward",
   "left",
   "up",
   "right",
   "down"
  ],
  "answer_index": 2,
  "frame_indices": [
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   6
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/VOST__3321_peel_onion/rgb_0.jpg"
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   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/VOST__3321_peel_onion/rgb_6.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "person's arms and hands preparing food",
   "B": "person wearing a beige t-shirt with a graphic print"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.015294517973308752
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "VOST__3322_peel_potato__camera_translation_direction__00",
  "video_id": "VOST__3322_peel_potato",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "down",
   "forward",
   "up",
   "right",
   "left",
   "backward"
  ],
  "answer_index": 3,
  "frame_indices": [
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   8
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   {
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/VOST__3322_peel_potato/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__3322_peel_potato/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person wearing a beige t-shirt with a graphic print",
   "B": "yellow fruit, likely a banana, being peeled"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
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 {
  "qa_id": "VOST__3322_peel_potato__object_world_motion_direction__01",
  "video_id": "VOST__3322_peel_potato",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object B (yellow fruit, likely a banana, being peeled) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "down",
  "options": [
   "right",
   "up",
   "forward",
   "backward",
   "down",
   "left"
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  "answer_index": 4,
  "frame_indices": [
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  "frame_references": [
   {
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    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/VOST__3322_peel_potato/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__3322_peel_potato/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "person wearing a beige t-shirt with a graphic print",
   "B": "yellow fruit, likely a banana, being peeled"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 },
 {
  "qa_id": "VOST__3345_peel_courgette__camera_translation_direction__00",
  "video_id": "VOST__3345_peel_courgette",
  "task": "camera_translation_direction",
  "question": "From F1 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "left",
   "down",
   "forward",
   "right",
   "backward",
   "up"
  ],
  "answer_index": 4,
  "frame_indices": [
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  "frame_references": [
   {
    "frame_index": 1,
    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/VOST__3345_peel_courgette/rgb_1.jpg"
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   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/VOST__3345_peel_courgette/rgb_3.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "tracked object [g2]",
   "B": "tracked object [g3]"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "travel_ratio": 1.5,
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   "min_intervals": 2,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "VOST__3447_squeeze_sausage__object_travel_distance_comparison__00",
  "video_id": "VOST__3447_squeeze_sausage",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F1 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (left arm and hand) or B (right arm and hand with blue wristband)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "A",
  "options": [
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   "B"
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  "frame_indices": [
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   2,
   3,
   4
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    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
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    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
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   "B": "right arm and hand with blue wristband"
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     0.40779808163642883,
     0.4566289782524109,
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    "travel_gap_depths": 0.19718264788389206,
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    "distance_change_bootstrap95": [
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   "record_key": "VOST__3447_squeeze_sausage__g1_g2__F1-F4",
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   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "VOST__3496_peel_onion__camera_translation_direction__00",
  "video_id": "VOST__3496_peel_onion",
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  "question": "From F0 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "right",
   "down",
   "backward",
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  "frame_indices": [
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    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "VOST__3687_rip_foil__camera_translation_direction__00",
  "video_id": "VOST__3687_rip_foil",
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  "question": "From F0 to F2, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "left",
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   "up"
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    "normalized_time": 0.24489795918367346,
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   "travel_max_min": 0.2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "VOST__3687_rip_foil__object_world_motion_direction__01",
  "video_id": "VOST__3687_rip_foil",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object A (rectangular package wrapped in clear plastic with a purple label) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "down",
   "right",
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   "backward"
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    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/VOST__3687_rip_foil/rgb_2.jpg"
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  "target_mapping": {
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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   "min_intervals": 2,
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__3702_grate_cheese__camera_translation_direction__00",
  "video_id": "VOST__3702_grate_cheese",
  "task": "camera_translation_direction",
  "question": "From F0 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "down",
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   "backward",
   "up"
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    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/VOST__3702_grate_cheese/rgb_7.jpg"
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  "target_mapping": {
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "VOST__3702_grate_cheese__object_world_motion_direction__01",
  "video_id": "VOST__3702_grate_cheese",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object B (person's left arm and hand holding a grater) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "up",
  "options": [
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   "down",
   "backward",
   "right",
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   "up"
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   {
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    "normalized_time": 1.0,
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  "target_mapping": {
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  "target_descriptions": {
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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  "qa_id": "VOST__4016_cut_herbs__camera_translation_direction__00",
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  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
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   "B": "person in black shirt with green contour"
  },
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
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  "video_id": "VOST__4233_cut_potato",
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   "up",
   "backward",
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    "released_frame_index": 18,
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    "normalized_time": 0.3673469387755102,
    "image_path": "cases/VOST__4233_cut_potato/rgb_3.jpg"
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  "target_mapping": {
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   "left",
   "forward",
   "down",
   "backward",
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    "normalized_time": 0.3673469387755102,
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   "left",
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  "answer": "closer",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
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 {
  "qa_id": "VOST__4663_cut_ginger__camera_translation_direction__00",
  "video_id": "VOST__4663_cut_ginger",
  "task": "camera_translation_direction",
  "question": "From F1 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "up",
   "right",
   "down",
   "left",
   "forward"
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  "answer_index": 5,
  "frame_indices": [
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   7
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/VOST__4663_cut_ginger/rgb_1.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/VOST__4663_cut_ginger/rgb_7.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "tracked object [g3]"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__4690_cut_guava__camera_translation_direction__00",
  "video_id": "VOST__4690_cut_guava",
  "task": "camera_translation_direction",
  "question": "From F5 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "right",
   "up",
   "left",
   "forward",
   "backward"
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  "answer_index": 4,
  "frame_indices": [
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   8
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    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__4690_cut_guava/rgb_5.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__4690_cut_guava/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g2]",
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "object_translation": 0.1,
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
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 },
 {
  "qa_id": "VOST__4690_cut_guava__camera_view_direction_change__01",
  "video_id": "VOST__4690_cut_guava",
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  "question": "From F5 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F5?",
  "answer": "down",
  "options": [
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   "down",
   "up"
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  "frame_indices": [
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    "image_path": "cases/VOST__4690_cut_guava/rgb_5.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__4690_cut_guava/rgb_8.jpg"
   }
  ],
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  "target_mapping": {
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   "B": "g3"
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   "camera_turn_gap_deg": 8.0,
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__4691_cut_guava__camera_translation_direction__00",
  "video_id": "VOST__4691_cut_guava",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "down",
   "right",
   "forward",
   "backward",
   "up"
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  "answer_index": 3,
  "frame_indices": [
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/VOST__4691_cut_guava/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__4691_cut_guava/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g2]",
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__4836_peel_root__camera_translation_direction__00",
  "video_id": "VOST__4836_peel_root",
  "task": "camera_translation_direction",
  "question": "From F4 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "down",
  "options": [
   "up",
   "left",
   "backward",
   "right",
   "forward",
   "down"
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  "answer_index": 5,
  "frame_indices": [
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    "released_frame_name": "00025.jpg",
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    "image_path": "cases/VOST__4836_peel_root/rgb_4.jpg"
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   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/VOST__4836_peel_root/rgb_6.jpg"
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  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g4"
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  "target_descriptions": {
   "A": "tracked object [g1]",
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "camera_turn_gap_deg": 8.0,
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   "pair_initial_separation": 0.08,
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
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 {
  "qa_id": "VOST__4900_cut_pumpkin__camera_translation_direction__00",
  "video_id": "VOST__4900_cut_pumpkin",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "forward",
   "backward",
   "up",
   "right",
   "down",
   "left"
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  "answer_index": 3,
  "frame_indices": [
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/VOST__4900_cut_pumpkin/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__4900_cut_pumpkin/rgb_8.jpg"
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  ],
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  "target_mapping": {
   "A": "g2",
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  "target_descriptions": {
   "A": "person wearing a light-colored long-sleeve shirt and a black apron",
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  "evidence": {
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "VOST__4900_cut_pumpkin__object_travel_distance_comparison__01",
  "video_id": "VOST__4900_cut_pumpkin",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F4 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person wearing a light-colored long-sleeve shirt and a black apron) or B (yellow vegetable pieces on a white cutting board)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "A",
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    "released_frame_name": "00025.jpg",
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    "image_path": "cases/VOST__4900_cut_pumpkin/rgb_4.jpg"
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   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__4900_cut_pumpkin/rgb_5.jpg"
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   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/VOST__4900_cut_pumpkin/rgb_6.jpg"
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   {
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    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/VOST__4900_cut_pumpkin/rgb_7.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__4900_cut_pumpkin/rgb_8.jpg"
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  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g2",
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  "target_descriptions": {
   "A": "person wearing a light-colored long-sleeve shirt and a black apron",
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  "evidence": {
   "metrics": {
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    "distance_change_depths": 0.0704534649848938,
    "relative_distance_change": 0.1270958761175067,
    "travel_a_depths": 0.30083438754081726,
    "travel_b_depths": 0.047347478568553925,
    "travel_gap_depths": 0.25348690897226334,
    "travel_ratio": 6.353757298928649,
    "distance_change_bootstrap95": [
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    "travel_a_minus_b_bootstrap95": [
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   "record_key": "VOST__4900_cut_pumpkin__g2_g3__F4-F8",
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   "A": "person wearing a light purple t-shirt"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
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   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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 {
  "qa_id": "VOST__5179_unpack_meat__object_world_motion_direction__01",
  "video_id": "VOST__5179_unpack_meat",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (person wearing a light purple t-shirt) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "backward",
   "right",
   "left",
   "down",
   "up"
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  "frame_indices": [
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   8
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    "released_frame_index": 143,
    "released_frame_name": "00144.jpg",
    "normalized_time": 0.7486910994764397,
    "image_path": "cases/VOST__5179_unpack_meat/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 191,
    "released_frame_name": "00192.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__5179_unpack_meat/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g3"
  },
  "target_descriptions": {
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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  "qa_id": "VOST__5212_open_blender__camera_translation_direction__00",
  "video_id": "VOST__5212_open_blender",
  "task": "camera_translation_direction",
  "question": "From F4 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "backward",
   "forward",
   "right",
   "left",
   "down"
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  "frame_indices": [
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   6
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   {
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    "released_frame_index": 76,
    "released_frame_name": "00077.jpg",
    "normalized_time": 0.5,
    "image_path": "cases/VOST__5212_open_blender/rgb_4.jpg"
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   {
    "frame_index": 6,
    "released_frame_index": 114,
    "released_frame_name": "00115.jpg",
    "normalized_time": 0.75,
    "image_path": "cases/VOST__5212_open_blender/rgb_6.jpg"
   }
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  "target_mapping": {
   "A": "g4",
   "B": "g5"
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  "target_descriptions": {
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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  "manual_review": false
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  "qa_id": "VOST__5253_open_package__camera_translation_direction__00",
  "video_id": "VOST__5253_open_package",
  "task": "camera_translation_direction",
  "question": "From F5 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "down",
   "backward",
   "right",
   "left",
   "up"
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  "answer_index": 3,
  "frame_indices": [
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    "released_frame_index": 57,
    "released_frame_name": "00058.jpg",
    "normalized_time": 0.6263736263736264,
    "image_path": "cases/VOST__5253_open_package/rgb_5.jpg"
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   {
    "frame_index": 7,
    "released_frame_index": 80,
    "released_frame_name": "00081.jpg",
    "normalized_time": 0.8791208791208791,
    "image_path": "cases/VOST__5253_open_package/rgb_7.jpg"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "object_translation": 0.1,
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "VOST__5263_open_engine__camera_translation_direction__00",
  "video_id": "VOST__5263_open_engine",
  "task": "camera_translation_direction",
  "question": "From F1 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "down",
   "backward",
   "forward",
   "right",
   "up"
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  "answer_index": 0,
  "frame_indices": [
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  "frame_references": [
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/VOST__5263_open_engine/rgb_1.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__5263_open_engine/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g2]",
   "B": "tracked object [g3]"
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  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "VOST__5263_open_engine__camera_view_direction_change__01",
  "video_id": "VOST__5263_open_engine",
  "task": "camera_view_direction_change",
  "question": "From F1 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
  "answer": "right",
  "options": [
   "up",
   "left",
   "right",
   "down"
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  "answer_index": 2,
  "frame_indices": [
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/VOST__5263_open_engine/rgb_1.jpg"
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   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__5263_open_engine/rgb_5.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g2]",
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  "evidence": {
   "yaw_deg": 16.807060839672918,
   "pitch_deg": -4.175268012892545,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "VOST__5288_open_box__camera_translation_direction__00",
  "video_id": "VOST__5288_open_box",
  "task": "camera_translation_direction",
  "question": "From F1 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "down",
   "backward",
   "up",
   "right",
   "forward",
   "left"
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  "answer_index": 3,
  "frame_indices": [
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    "released_frame_name": "00007.jpg",
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    "image_path": "cases/VOST__5288_open_box/rgb_1.jpg"
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   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/VOST__5288_open_box/rgb_3.jpg"
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  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g4"
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  "target_descriptions": {
   "A": "tracked object [g2]",
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  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
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 {
  "qa_id": "VOST__531_cut_potato__camera_translation_direction__00",
  "video_id": "VOST__531_cut_potato",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "left",
   "down",
   "backward",
   "up",
   "forward",
   "right"
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  "frame_indices": [
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    "image_path": "cases/VOST__531_cut_potato/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 164,
    "released_frame_name": "00165.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__531_cut_potato/rgb_8.jpg"
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  ],
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  "target_descriptions": {
   "A": "tracked object [g1]",
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  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "manual_review": false
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 {
  "qa_id": "VOST__5323_open_container__camera_translation_direction__00",
  "video_id": "VOST__5323_open_container",
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  "question": "From F2 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "down",
  "options": [
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   "down",
   "backward",
   "left",
   "right",
   "up"
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  "frame_indices": [
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   4
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    "released_frame_name": "00013.jpg",
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    "image_path": "cases/VOST__5323_open_container/rgb_2.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__5323_open_container/rgb_4.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "person wearing blue jeans and a blue shirt with orange cuffs",
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   "min_intervals": 2,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "VOST__532_cut_potato__camera_translation_direction__00",
  "video_id": "VOST__532_cut_potato",
  "task": "camera_translation_direction",
  "question": "From F1 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "down",
   "up",
   "left",
   "backward",
   "right"
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  "answer_index": 3,
  "frame_indices": [
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    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/VOST__532_cut_potato/rgb_1.jpg"
   },
   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/VOST__532_cut_potato/rgb_6.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "person in blue shirt",
   "B": "person in blue shirt"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_ratio": 1.5,
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   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "VOST__533_cut_asparagus__camera_translation_direction__00",
  "video_id": "VOST__533_cut_asparagus",
  "task": "camera_translation_direction",
  "question": "From F0 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "up",
   "left",
   "down",
   "right",
   "forward"
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  "answer_index": 4,
  "frame_indices": [
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    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/VOST__533_cut_asparagus/rgb_0.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__533_cut_asparagus/rgb_4.jpg"
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  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g1]",
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
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  "qa_id": "VOST__533_cut_asparagus__camera_view_direction_change__01",
  "video_id": "VOST__533_cut_asparagus",
  "task": "camera_view_direction_change",
  "question": "From F2 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
  "answer": "left",
  "options": [
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   "down",
   "up",
   "left"
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  "answer_index": 3,
  "frame_indices": [
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  "frame_references": [
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    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/VOST__533_cut_asparagus/rgb_2.jpg"
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   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__533_cut_asparagus/rgb_4.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "tracked object [g3]"
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   "yaw_deg": -17.55871092292545,
   "pitch_deg": 7.306584915340174,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "VOST__5342_open_bag__camera_translation_direction__00",
  "video_id": "VOST__5342_open_bag",
  "task": "camera_translation_direction",
  "question": "From F6 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "backward",
   "down",
   "left",
   "right",
   "up",
   "forward"
  ],
  "answer_index": 3,
  "frame_indices": [
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  "frame_references": [
   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/VOST__5342_open_bag/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__5342_open_bag/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {},
  "target_descriptions": {},
  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "VOST__5783_apply_paint__camera_translation_direction__00",
  "video_id": "VOST__5783_apply_paint",
  "task": "camera_translation_direction",
  "question": "From F1 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
   "backward",
   "down",
   "up",
   "forward",
   "right"
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  "answer_index": 4,
  "frame_indices": [
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    "released_frame_name": "00011.jpg",
    "normalized_time": 0.13157894736842105,
    "image_path": "cases/VOST__5783_apply_paint/rgb_1.jpg"
   },
   {
    "frame_index": 6,
    "released_frame_index": 57,
    "released_frame_name": "00058.jpg",
    "normalized_time": 0.75,
    "image_path": "cases/VOST__5783_apply_paint/rgb_6.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g3"
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  "target_descriptions": {
   "A": "tracked object [g3]"
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  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
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 {
  "qa_id": "VOST__5788_apply_paint__camera_translation_direction__00",
  "video_id": "VOST__5788_apply_paint",
  "task": "camera_translation_direction",
  "question": "From F1 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "forward",
   "left",
   "backward",
   "right",
   "down",
   "up"
  ],
  "answer_index": 3,
  "frame_indices": [
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  "frame_references": [
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    "released_frame_name": "00011.jpg",
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    "image_path": "cases/VOST__5788_apply_paint/rgb_1.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 77,
    "released_frame_name": "00078.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__5788_apply_paint/rgb_8.jpg"
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  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "tracked object [g1]"
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  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "travel_max_min": 0.2,
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   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__6077_wash_cloth__camera_translation_direction__00",
  "video_id": "VOST__6077_wash_cloth",
  "task": "camera_translation_direction",
  "question": "From F6 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "forward",
   "backward",
   "down",
   "up",
   "left"
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  "frame_indices": [
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    "released_frame_index": 49,
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  "target_mapping": {
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  "target_descriptions": {
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 {
  "qa_id": "VOST__6099_spread_glue__camera_translation_direction__00",
  "video_id": "VOST__6099_spread_glue",
  "task": "camera_translation_direction",
  "question": "From F2 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "forward",
   "up",
   "left",
   "right",
   "backward"
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  "frame_indices": [
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    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
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  "quality_status": "provisional_automated_pass",
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 {
  "qa_id": "VOST__6099_spread_glue__object_world_motion_direction__01",
  "video_id": "VOST__6099_spread_glue",
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  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (person's right arm and hand holding a tool) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "right",
   "up",
   "forward",
   "down"
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    "normalized_time": 0.3673469387755102,
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    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__6099_spread_glue/rgb_5.jpg"
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  "target_mapping": {
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "question": "Over the sampled trajectory from F3 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person's right arm and hand holding a tool) or B (person's left arm and hand pressing down on cardboard)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__6099_spread_glue/rgb_5.jpg"
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   "camera_turn_gap_deg": 8.0,
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "VOST__6101_spread_glue__camera_translation_direction__00",
  "video_id": "VOST__6101_spread_glue",
  "task": "camera_translation_direction",
  "question": "From F0 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "backward",
   "left",
   "down",
   "up",
   "right",
   "forward"
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  "answer_index": 5,
  "frame_indices": [
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    "image_path": "cases/VOST__6101_spread_glue/rgb_0.jpg"
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   {
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__6101_spread_glue/rgb_4.jpg"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 {
  "qa_id": "VOST__6152_knead_dough__camera_translation_direction__00",
  "video_id": "VOST__6152_knead_dough",
  "task": "camera_translation_direction",
  "question": "From F6 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "backward",
   "up",
   "right",
   "forward",
   "down",
   "left"
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  "answer_index": 2,
  "frame_indices": [
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    "image_path": "cases/VOST__6152_knead_dough/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
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    "normalized_time": 1.0,
    "image_path": "cases/VOST__6152_knead_dough/rgb_8.jpg"
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   "A": "person wearing a pink long-sleeved top and patterned pants, mixing dough",
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "VOST__6209_apply_paint__camera_translation_direction__00",
  "video_id": "VOST__6209_apply_paint",
  "task": "camera_translation_direction",
  "question": "From F0 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "forward",
   "right",
   "left",
   "backward",
   "down",
   "up"
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  "answer_index": 0,
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    "image_path": "cases/VOST__6209_apply_paint/rgb_0.jpg"
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   {
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    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__6209_apply_paint/rgb_5.jpg"
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  ],
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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  "qa_id": "VOST__6315_apply_paint__object_travel_distance_comparison__02",
  "video_id": "VOST__6315_apply_paint",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F4 through F6, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person's arm wearing a black glove and orange sleeve) or B (pair of grey sneakers with white laces)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "B"
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  "frame_indices": [
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   6
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    "released_frame_index": 31,
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  "target_mapping": {
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    "travel_a_depths": 0.2677444517612457,
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    "travel_gap_depths": 0.2504887282848358,
    "travel_ratio": 15.516269261458431,
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   "record_key": "VOST__6315_apply_paint__g1_g3__F4-F6",
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     1.5588862895965576
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     1.5844073295593262
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     0.9578129649162292,
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   "initial_track_counts": [
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "VOST__6342_apply_paint__camera_translation_direction__00",
  "video_id": "VOST__6342_apply_paint",
  "task": "camera_translation_direction",
  "question": "From F0 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "right",
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   "down",
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   "up"
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    "released_frame_index": 42,
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    "normalized_time": 0.875,
    "image_path": "cases/VOST__6342_apply_paint/rgb_7.jpg"
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 {
  "qa_id": "VOST__6342_apply_paint__camera_object_distance_change__01",
  "video_id": "VOST__6342_apply_paint",
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  "question": "From F0 to F7, did object B (small grey miniature figure) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__6346_apply_paint__camera_translation_direction__00",
  "video_id": "VOST__6346_apply_paint",
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  "question": "From F0 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "VOST__6404_apply_pencil__camera_translation_direction__00",
  "video_id": "VOST__6404_apply_pencil",
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  "question": "From F2 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 },
 {
  "qa_id": "VOST__6404_apply_pencil__object_world_motion_direction__01",
  "video_id": "VOST__6404_apply_pencil",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object B (left hand resting on the paper) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 },
 {
  "qa_id": "VOST__6404_apply_pencil__camera_object_distance_change__02",
  "video_id": "VOST__6404_apply_pencil",
  "task": "camera_object_distance_change",
  "question": "From F6 to F8, did object B (left hand resting on the paper) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
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   "closer"
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  "frame_indices": [
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    "image_path": "cases/VOST__6404_apply_pencil/rgb_8.jpg"
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  "target_mapping": {
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  "target_descriptions": {
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 {
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 {
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 {
  "qa_id": "VOST__6417_apply_pencil__camera_translation_direction__00",
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  "qa_id": "VOST__6490_apply_paint__camera_translation_direction__00",
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  "qa_id": "VOST__6863_spread_cards__camera_translation_direction__00",
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__739_cut_onion__camera_translation_direction__00",
  "video_id": "VOST__739_cut_onion",
  "task": "camera_translation_direction",
  "question": "From F4 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "left",
   "backward",
   "down",
   "right",
   "forward",
   "up"
  ],
  "answer_index": 0,
  "frame_indices": [
   4,
   7
  ],
  "frame_references": [
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.5,
    "image_path": "cases/VOST__739_cut_onion/rgb_4.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 42,
    "released_frame_name": "00043.jpg",
    "normalized_time": 0.875,
    "image_path": "cases/VOST__739_cut_onion/rgb_7.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g4"
  },
  "target_descriptions": {
   "A": "tracked object [g4]"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    0.010061483067977127,
    0.07136380635864006
   ],
   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__7623_saw_wood__camera_translation_direction__00",
  "video_id": "VOST__7623_saw_wood",
  "task": "camera_translation_direction",
  "question": "From F0 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "down",
  "options": [
   "right",
   "up",
   "forward",
   "down",
   "backward",
   "left"
  ],
  "answer_index": 3,
  "frame_indices": [
   0,
   4
  ],
  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/VOST__7623_saw_wood/rgb_0.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__7623_saw_wood/rgb_4.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "tracked object [g2]",
   "B": "tracked object [g3]"
  },
  "evidence": {
   "displacement_start_camera_depths": [
    -0.048094971797026174,
    0.2265107986196037,
    0.10674338337851112
   ],
   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__7786_break_puzzle__camera_translation_direction__00",
  "video_id": "VOST__7786_break_puzzle",
  "task": "camera_translation_direction",
  "question": "From F2 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "forward",
   "up",
   "right",
   "down",
   "backward",
   "left"
  ],
  "answer_index": 0,
  "frame_indices": [
   2,
   5
  ],
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   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/VOST__7786_break_puzzle/rgb_2.jpg"
   },
   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__7786_break_puzzle/rgb_5.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "tracked object [g1]"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.050538580833303,
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__801_cut_chicken__camera_translation_direction__00",
  "video_id": "VOST__801_cut_chicken",
  "task": "camera_translation_direction",
  "question": "From F4 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "backward",
   "up",
   "forward",
   "left",
   "right",
   "down"
  ],
  "answer_index": 4,
  "frame_indices": [
   4,
   8
  ],
  "frame_references": [
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__801_cut_chicken/rgb_4.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__801_cut_chicken/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person wearing a dark blue shirt",
   "B": "person's left arm"
  },
  "evidence": {
   "displacement_start_camera_depths": [
    0.1309279960870994,
    0.006710986035872941,
    -0.015148689252653138
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__801_cut_chicken__camera_view_direction_change__01",
  "video_id": "VOST__801_cut_chicken",
  "task": "camera_view_direction_change",
  "question": "From F4 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
  "answer": "right",
  "options": [
   "down",
   "up",
   "right",
   "left"
  ],
  "answer_index": 2,
  "frame_indices": [
   4,
   8
  ],
  "frame_references": [
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/VOST__801_cut_chicken/rgb_4.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__801_cut_chicken/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person wearing a dark blue shirt",
   "B": "person's left arm"
  },
  "evidence": {
   "yaw_deg": 19.743404936957912,
   "pitch_deg": 6.225874039275001,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__801_cut_chicken__object_world_motion_direction__02",
  "video_id": "VOST__801_cut_chicken",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object B (person's left arm) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "forward",
   "right",
   "down",
   "up",
   "backward",
   "left"
  ],
  "answer_index": 1,
  "frame_indices": [
   5,
   8
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  "frame_references": [
   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__801_cut_chicken/rgb_5.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__801_cut_chicken/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g2"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person wearing a dark blue shirt",
   "B": "person's left arm"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    0.024746942000509087,
    0.09937759913733094
   ],
   "dominant_component_bootstrap95": [
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    0.32169541995625095
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__810_cut_dough__camera_translation_direction__00",
  "video_id": "VOST__810_cut_dough",
  "task": "camera_translation_direction",
  "question": "From F5 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "backward",
   "down",
   "left",
   "up",
   "right",
   "forward"
  ],
  "answer_index": 2,
  "frame_indices": [
   5,
   8
  ],
  "frame_references": [
   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/VOST__810_cut_dough/rgb_5.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__810_cut_dough/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "person wearing a blue shirt and black apron cutting dough",
   "B": "round ball of raw flour dough on a dark countertop"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "VOST__810_cut_dough__camera_view_direction_change__01",
  "video_id": "VOST__810_cut_dough",
  "task": "camera_view_direction_change",
  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "down",
  "options": [
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   "right",
   "down"
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  "frame_indices": [
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  "frame_references": [
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    "released_frame_index": 0,
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    "normalized_time": 0.0,
    "image_path": "cases/VOST__810_cut_dough/rgb_0.jpg"
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    "released_frame_index": 24,
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    "normalized_time": 0.4897959183673469,
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  "target_mapping": {
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   "B": "g3"
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  "target_descriptions": {
   "A": "person wearing a blue shirt and black apron cutting dough",
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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 {
  "qa_id": "VOST__8267_pour_flour__object_pair_distance_change__00",
  "video_id": "VOST__8267_pour_flour",
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  "answer": "decreased",
  "options": [
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  "answer_index": 1,
  "frame_indices": [
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   5
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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 {
  "qa_id": "VOST__8560_peel_carrot__camera_view_direction_change__00",
  "video_id": "VOST__8560_peel_carrot",
  "task": "camera_view_direction_change",
  "question": "From F5 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F5?",
  "answer": "up",
  "options": [
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   "right"
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    "normalized_time": 1.0,
    "image_path": "cases/VOST__8560_peel_carrot/rgb_8.jpg"
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  "qa_id": "VOST__8601_peel_ginger__camera_translation_direction__00",
  "video_id": "VOST__8601_peel_ginger",
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  "question": "From F1 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "right",
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    "image_path": "cases/VOST__8601_peel_ginger/rgb_8.jpg"
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   "seed_count": 256,
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 {
  "qa_id": "VOST__8679_roll_dough__camera_translation_direction__00",
  "video_id": "VOST__8679_roll_dough",
  "task": "camera_translation_direction",
  "question": "From F3 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "right",
   "down",
   "backward"
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 {
  "qa_id": "VOST__8918_eat_food__camera_translation_direction__00",
  "video_id": "VOST__8918_eat_food",
  "task": "camera_translation_direction",
  "question": "From F4 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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 {
  "qa_id": "VOST__8918_eat_food__camera_object_distance_change__01",
  "video_id": "VOST__8918_eat_food",
  "task": "camera_object_distance_change",
  "question": "From F4 to F6, did object A (small black rectangular device with a screen displaying a purple light) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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 {
  "qa_id": "VOST__8921_eat_food__camera_translation_direction__00",
  "video_id": "VOST__8921_eat_food",
  "task": "camera_translation_direction",
  "question": "From F4 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "down",
   "up",
   "left",
   "forward",
   "backward"
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__8921_eat_food/rgb_8.jpg"
   }
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  "target_mapping": {
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__9119_break_nut__camera_translation_direction__00",
  "video_id": "VOST__9119_break_nut",
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  "question": "From F0 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "down",
   "forward",
   "left",
   "right"
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    "released_frame_index": 49,
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   "seed_count": 256,
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  "qa_id": "VOST__9258_split_cards__camera_translation_direction__00",
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  "question": "From F2 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "right",
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 {
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  "question": "After compensating for camera motion from F1 to F8, in which dominant direction did object A (person's right arm and hand holding a paintbrush) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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    "frame_index": 8,
    "released_frame_index": 126,
    "released_frame_name": "00127.jpg",
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    "image_path": "cases/VOST__9285_apply_paint/rgb_8.jpg"
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 {
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  "question": "From F1 to F8, did the 3D distance between object A (person's right arm and hand holding a paintbrush) and object B (person's left arm wearing a grey patterned sleeve) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
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  "frame_indices": [
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    "released_frame_name": "00127.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__9285_apply_paint/rgb_8.jpg"
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  "target_mapping": {
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   "record_key": "VOST__9285_apply_paint__g1_g4__F1-F8",
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   "track_counts": [
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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 },
 {
  "qa_id": "VOST__9285_apply_paint__object_travel_distance_comparison__02",
  "video_id": "VOST__9285_apply_paint",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F1 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person's right arm and hand holding a paintbrush) or B (person's left arm wearing a grey patterned sleeve)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   {
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    "image_path": "cases/VOST__9285_apply_paint/rgb_4.jpg"
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    "normalized_time": 0.626984126984127,
    "image_path": "cases/VOST__9285_apply_paint/rgb_5.jpg"
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   {
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    "image_path": "cases/VOST__9285_apply_paint/rgb_6.jpg"
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    "released_frame_name": "00127.jpg",
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    "image_path": "cases/VOST__9285_apply_paint/rgb_8.jpg"
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 {
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 {
  "qa_id": "VOST__9369_scoop_batter__object_world_motion_direction__00",
  "video_id": "VOST__9369_scoop_batter",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (bare arm reaching towards a pot on the stove) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "question": "Over the sampled trajectory from F2 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (bare arm reaching towards a pot on the stove) or B (upper torso and shoulder of a person)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "VOST__9370_scoop_batter__camera_translation_direction__00",
  "video_id": "VOST__9370_scoop_batter",
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  "question": "From F1 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "VOST__9370_scoop_batter__object_world_motion_direction__01",
  "video_id": "VOST__9370_scoop_batter",
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  "question": "After compensating for camera motion from F1 to F4, in which dominant direction did object A (arm reaching towards a pan on the stove) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 },
 {
  "qa_id": "VOST__9370_scoop_batter__object_travel_distance_comparison__02",
  "video_id": "VOST__9370_scoop_batter",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F1 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (arm reaching towards a pan on the stove) or B (torso of a person wearing a dark shirt)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "options": [
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 {
  "qa_id": "VOST__9398_scoop_cement__camera_translation_direction__00",
  "video_id": "VOST__9398_scoop_cement",
  "task": "camera_translation_direction",
  "question": "From F4 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 49,
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    "image_path": "cases/VOST__9398_scoop_cement/rgb_8.jpg"
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  "target_mapping": {
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "VOST__9398_scoop_cement__camera_view_direction_change__01",
  "video_id": "VOST__9398_scoop_cement",
  "task": "camera_view_direction_change",
  "question": "From F1 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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   "up",
   "right"
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "group": "HHH",
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 },
 {
  "qa_id": "VOST__9688_divide_dough__camera_translation_direction__00",
  "video_id": "VOST__9688_divide_dough",
  "task": "camera_translation_direction",
  "question": "From F6 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "left",
   "up",
   "forward",
   "down",
   "right"
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    "released_frame_index": 104,
    "released_frame_name": "00105.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/VOST__9688_divide_dough/rgb_8.jpg"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 },
 {
  "qa_id": "VOST__971_cut_onion__camera_translation_direction__00",
  "video_id": "VOST__971_cut_onion",
  "task": "camera_translation_direction",
  "question": "From F0 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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 },
 {
  "qa_id": "VOST__971_cut_onion__object_world_motion_direction__01",
  "video_id": "VOST__971_cut_onion",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (person's left arm and hand holding a knife, wearing a watch) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "left",
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    "normalized_time": 1.0,
    "image_path": "cases/VOST__971_cut_onion/rgb_8.jpg"
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 },
 {
  "qa_id": "VOST__971_cut_onion__object_travel_distance_comparison__02",
  "video_id": "VOST__971_cut_onion",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F6 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person's left arm and hand holding a knife, wearing a watch) or B (person's right arm and hand holding food, wearing a grey patterned shirt)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "VOST__996_cut_bacon__camera_translation_direction__00",
  "video_id": "VOST__996_cut_bacon",
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  "question": "From F1 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "VOST__996_cut_bacon__object_travel_distance_comparison__01",
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  "question": "Over the sampled trajectory from F2 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person's left arm and hand wearing a black long-sleeved shirt, reaching towards a plate) or B (person's torso and right hand wearing a black t-shirt with white graphic text, holding a knife)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
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  "video_id": "uvo__-2Km-NboGO4",
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  "question": "From F0 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (person standing on the pool deck) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "uvo__-3W9JmAcHxI__camera_translation_direction__00",
  "video_id": "uvo__-3W9JmAcHxI",
  "task": "camera_translation_direction",
  "question": "From F0 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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 {
  "qa_id": "uvo__-5O_xxIpooE__camera_translation_direction__00",
  "video_id": "uvo__-5O_xxIpooE",
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  "question": "From F4 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "left"
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__-5O_xxIpooE/rgb_8.jpg"
   }
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 {
  "qa_id": "uvo__-5O_xxIpooE__camera_view_direction_change__01",
  "video_id": "uvo__-5O_xxIpooE",
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  "question": "From F5 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F5?",
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    "image_path": "cases/uvo__-5O_xxIpooE/rgb_7.jpg"
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 {
  "qa_id": "uvo__-5O_xxIpooE__object_world_motion_direction__02",
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  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (person wearing an orange shirt and a black adidas cap) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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  "video_id": "uvo__-5Tu_wiNnmg",
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  "question": "From F3 to F8, did object B (man in kilt and black jacket playing bagpipes) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "image_path": "cases/uvo__-5Tu_wiNnmg/rgb_8.jpg"
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 {
  "qa_id": "uvo__-5kButbj9OE__camera_translation_direction__00",
  "video_id": "uvo__-5kButbj9OE",
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   "backward",
   "forward"
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 {
  "qa_id": "uvo__-5kButbj9OE__camera_view_direction_change__01",
  "video_id": "uvo__-5kButbj9OE",
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  "question": "From F1 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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 },
 {
  "qa_id": "uvo__-6VzhYhWDMY__camera_translation_direction__00",
  "video_id": "uvo__-6VzhYhWDMY",
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  "question": "From F3 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "forward"
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    "released_frame_name": "00019.jpg",
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__-6VzhYhWDMY/rgb_8.jpg"
   }
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  "target_mapping": {
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   "B": "g2"
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  "qa_id": "uvo__-6VzhYhWDMY__object_world_motion_direction__01",
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    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__-6VzhYhWDMY/rgb_5.jpg"
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  "qa_id": "uvo__-6d7xfYKptE__camera_translation_direction__00",
  "video_id": "uvo__-6d7xfYKptE",
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  "question": "From F4 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
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    "image_path": "cases/uvo__-6d7xfYKptE/rgb_4.jpg"
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    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__-6d7xfYKptE/rgb_7.jpg"
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "uvo__-7yP-JTSHj0__camera_view_direction_change__00",
  "video_id": "uvo__-7yP-JTSHj0",
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  "question": "From F2 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
  "answer": "left",
  "options": [
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   "down"
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  "frame_indices": [
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    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
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   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__-7yP-JTSHj0/rgb_5.jpg"
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  ],
  "object_ids": [],
  "target_mapping": {
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   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "uvo__-8n8BguY7_Y__camera_translation_direction__00",
  "video_id": "uvo__-8n8BguY7_Y",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "down",
   "right",
   "forward",
   "left"
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  "answer_index": 0,
  "frame_indices": [
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    "image_path": "cases/uvo__-8n8BguY7_Y/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__-8n8BguY7_Y/rgb_8.jpg"
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  "target_mapping": {
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  "thresholds": {
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
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   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 {
  "qa_id": "uvo__-9DSHbAQ3F4__camera_translation_direction__00",
  "video_id": "uvo__-9DSHbAQ3F4",
  "task": "camera_translation_direction",
  "question": "From F0 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "up",
   "down",
   "backward",
   "right",
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  "answer_index": 5,
  "frame_indices": [
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/uvo__-9DSHbAQ3F4/rgb_0.jpg"
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   {
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    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__-9DSHbAQ3F4/rgb_5.jpg"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "localization_source": "GMOS MOS tracks",
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  "group": "HHL",
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 {
  "qa_id": "uvo__-9DSHbAQ3F4__camera_view_direction_change__01",
  "video_id": "uvo__-9DSHbAQ3F4",
  "task": "camera_view_direction_change",
  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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  "answer_index": 0,
  "frame_indices": [
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   {
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    "released_frame_name": "00032.jpg",
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    "image_path": "cases/uvo__-9DSHbAQ3F4/rgb_5.jpg"
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  "object_ids": [],
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   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__-A-5wR2-u5M__camera_view_direction_change__00",
  "video_id": "uvo__-A-5wR2-u5M",
  "task": "camera_view_direction_change",
  "question": "From F0 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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   {
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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  "qa_id": "uvo__-BkcYlaP_gI__camera_translation_direction__00",
  "video_id": "uvo__-BkcYlaP_gI",
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  "question": "From F0 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 18,
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  "qa_id": "uvo__-Cw8Z-5ShUM__camera_view_direction_change__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "uvo__-Eh3Bruf27Y__camera_view_direction_change__00",
  "video_id": "uvo__-Eh3Bruf27Y",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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    "normalized_time": 0.7551020408163265,
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  "qa_id": "uvo__-Eh3Bruf27Y__object_world_motion_direction__01",
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  "qa_id": "uvo__-F0Hh-YYbN4__camera_view_direction_change__00",
  "video_id": "uvo__-F0Hh-YYbN4",
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  "question": "From F1 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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 {
  "qa_id": "uvo__-Fp5reKg40w__camera_translation_direction__00",
  "video_id": "uvo__-Fp5reKg40w",
  "task": "camera_translation_direction",
  "question": "From F2 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "group": "HLH",
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 {
  "qa_id": "uvo__-GL4Rp-F50k__object_pair_distance_change__00",
  "video_id": "uvo__-GL4Rp-F50k",
  "task": "object_pair_distance_change",
  "question": "From F2 to F4, did the 3D distance between object A (person in black outfit) and object B (person in dark green jacket) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
   "increased",
   "decreased"
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  "answer_index": 1,
  "frame_indices": [
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   4
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    "released_frame_index": 24,
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    "image_path": "cases/uvo__-GL4Rp-F50k/rgb_4.jpg"
   }
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  "object_ids": [
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   "g4"
  ],
  "target_mapping": {
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   "B": "g4"
  },
  "target_descriptions": {
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   "B": "person in dark green jacket"
  },
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     0.8482712507247925,
     0.7187513113021851
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    "relative_distance_change": 0.28519771066865585,
    "travel_a_depths": 0.0595506876707077,
    "travel_b_depths": 0.29401999711990356,
    "travel_gap_depths": 0.23446930944919586,
    "travel_ratio": 4.937306496706143,
    "distance_change_bootstrap95": [
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     -0.2742870420217514
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    "travel_a_minus_b_bootstrap95": [
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     -0.22449075393378734
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   "initial_track_counts": [
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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 },
 {
  "qa_id": "uvo__-GL4Rp-F50k__object_travel_distance_comparison__01",
  "video_id": "uvo__-GL4Rp-F50k",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F2 through F4, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in black outfit) or B (person in dark green jacket)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "options": [
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   "B"
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  "frame_indices": [
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   3,
   4
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    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
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    "image_path": "cases/uvo__-GL4Rp-F50k/rgb_3.jpg"
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__-GL4Rp-F50k/rgb_4.jpg"
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    "travel_b_depths": 0.29401999711990356,
    "travel_gap_depths": 0.23446930944919586,
    "travel_ratio": 4.937306496706143,
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 },
 {
  "qa_id": "uvo__-IrgG_SljXU__camera_translation_direction__00",
  "video_id": "uvo__-IrgG_SljXU",
  "task": "camera_translation_direction",
  "question": "From F3 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "up",
   "forward",
   "right",
   "backward",
   "down",
   "left"
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    "released_frame_name": "00019.jpg",
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    "image_path": "cases/uvo__-IrgG_SljXU/rgb_3.jpg"
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   {
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__-IrgG_SljXU/rgb_8.jpg"
   }
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   "seed_count": 256,
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 },
 {
  "qa_id": "uvo__-JfMuIHK7Yg__camera_translation_direction__00",
  "video_id": "uvo__-JfMuIHK7Yg",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "up",
   "left",
   "forward"
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  "frame_indices": [
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   {
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    "released_frame_index": 49,
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    "image_path": "cases/uvo__-JfMuIHK7Yg/rgb_8.jpg"
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 },
 {
  "qa_id": "uvo__-JfMuIHK7Yg__camera_view_direction_change__01",
  "video_id": "uvo__-JfMuIHK7Yg",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
   "right",
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   "down",
   "left"
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  "frame_indices": [
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    "image_path": "cases/uvo__-JfMuIHK7Yg/rgb_8.jpg"
   }
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 },
 {
  "qa_id": "uvo__-L05Cc8huXg__object_world_motion_direction__00",
  "video_id": "uvo__-L05Cc8huXg",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (musher in purple jacket and orange hat) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "down"
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    "image_path": "cases/uvo__-L05Cc8huXg/rgb_5.jpg"
   }
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  "target_mapping": {
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
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  "qa_id": "uvo__-LenAZs2OFM__camera_view_direction_change__00",
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  "qa_id": "uvo__-MYJtLnxUqY__camera_view_direction_change__00",
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 {
  "qa_id": "uvo__-MYJtLnxUqY__object_travel_distance_comparison__04",
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  "question": "Over the sampled trajectory from F0 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (child in pink and grey raglan shirt) or B (person in pink patterned shirt with ponytail)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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 {
  "qa_id": "uvo__-RhNquKdM0M__camera_view_direction_change__00",
  "video_id": "uvo__-RhNquKdM0M",
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  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__-SGc-osF_VM__camera_object_distance_change__00",
  "video_id": "uvo__-SGc-osF_VM",
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  "question": "From F4 to F8, did object B (person in yellow shirt) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "image_path": "cases/uvo__-SGc-osF_VM/rgb_8.jpg"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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 },
 {
  "qa_id": "uvo__-SWG69JZ_vk__camera_view_direction_change__00",
  "video_id": "uvo__-SWG69JZ_vk",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "up",
  "options": [
   "right",
   "up",
   "down",
   "left"
  ],
  "answer_index": 1,
  "frame_indices": [
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   8
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__-SWG69JZ_vk/rgb_8.jpg"
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  "target_mapping": {},
  "target_descriptions": {},
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   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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   "min_intervals": 2,
   "min_tracks": 32,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__-T5iLC1Bm0g__camera_translation_direction__00",
  "video_id": "uvo__-T5iLC1Bm0g",
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  "question": "From F0 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "up",
   "forward",
   "left",
   "down"
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  "frame_indices": [
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    "image_path": "cases/uvo__-T5iLC1Bm0g/rgb_7.jpg"
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  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "uvo__-T5iLC1Bm0g__camera_view_direction_change__01",
  "video_id": "uvo__-T5iLC1Bm0g",
  "task": "camera_view_direction_change",
  "question": "From F0 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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   "left"
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  "frame_indices": [
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    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
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  "target_mapping": {
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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 {
  "qa_id": "uvo__-T5iLC1Bm0g__camera_object_distance_change__02",
  "video_id": "uvo__-T5iLC1Bm0g",
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   "camera_turn_gap_deg": 8.0,
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   "min_intervals": 2,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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  "qa_id": "uvo__-TUCIO1M01o__camera_translation_direction__00",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "forward"
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  "qa_id": "uvo__-TUCIO1M01o__camera_view_direction_change__01",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "uvo__-TUCIO1M01o__object_world_motion_direction__02",
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  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object B (person in white long-sleeve shirt and black pants) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "camera_turn_gap_deg": 8.0,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__-TdSou0hyEM__object_world_motion_direction__00",
  "video_id": "uvo__-TdSou0hyEM",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F7, in which dominant direction did object A (small bicycle with orange wheels) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "down",
   "left"
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   "seed_count": 256,
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 {
  "qa_id": "uvo__-XmBkxUhfMQ__camera_view_direction_change__00",
  "video_id": "uvo__-XmBkxUhfMQ",
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  "question": "From F1 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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    "image_path": "cases/uvo__-XmBkxUhfMQ/rgb_3.jpg"
   }
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  "target_mapping": {},
  "target_descriptions": {},
  "evidence": {
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   "pitch_deg": -0.8002369761681307,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "uvo__-YCuMrVTf0U__camera_translation_direction__00",
  "video_id": "uvo__-YCuMrVTf0U",
  "task": "camera_translation_direction",
  "question": "From F0 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "backward",
   "left",
   "forward",
   "right",
   "down"
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  "answer_index": 3,
  "frame_indices": [
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   3
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/uvo__-YCuMrVTf0U/rgb_0.jpg"
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   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__-YCuMrVTf0U/rgb_3.jpg"
   }
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  "object_ids": [],
  "target_mapping": {},
  "target_descriptions": {},
  "evidence": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
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   "pair_range_abs": 0.1,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "uvo__-YGnDKPOEd4__object_world_motion_direction__00",
  "video_id": "uvo__-YGnDKPOEd4",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (person in red shirt and black shorts playing tennis) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "options": [
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   "forward",
   "down",
   "backward",
   "right",
   "up"
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  "frame_indices": [
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/uvo__-YGnDKPOEd4/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__-YGnDKPOEd4/rgb_8.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in red shirt and black shorts playing tennis"
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   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 {
  "qa_id": "uvo__-YtMJtz0C0Y__camera_view_direction_change__00",
  "video_id": "uvo__-YtMJtz0C0Y",
  "task": "camera_view_direction_change",
  "question": "From F5 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F5?",
  "answer": "right",
  "options": [
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   "right",
   "left"
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  "frame_indices": [
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    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__-YtMJtz0C0Y/rgb_5.jpg"
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   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__-YtMJtz0C0Y/rgb_7.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in dark clothing sledding down a snowy road"
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   "pitch_deg": 1.0348144394130476,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
  "manual_review": false
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 {
  "qa_id": "uvo__-YtMJtz0C0Y__object_world_motion_direction__01",
  "video_id": "uvo__-YtMJtz0C0Y",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object A (person in dark clothing sledding down a snowy road) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "up",
   "down",
   "right",
   "forward",
   "backward"
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  "answer_index": 5,
  "frame_indices": [
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   7
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    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__-YtMJtz0C0Y/rgb_5.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__-YtMJtz0C0Y/rgb_7.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in dark clothing sledding down a snowy road"
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
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 {
  "qa_id": "uvo__-YtMJtz0C0Y__camera_object_distance_change__02",
  "video_id": "uvo__-YtMJtz0C0Y",
  "task": "camera_object_distance_change",
  "question": "From F5 to F7, did object A (person in dark clothing sledding down a snowy road) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
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  "answer_index": 0,
  "frame_indices": [
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    "image_path": "cases/uvo__-YtMJtz0C0Y/rgb_5.jpg"
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   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__-YtMJtz0C0Y/rgb_7.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in dark clothing sledding down a snowy road"
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   "delta_depths": -1.0991169824834877,
   "relative_change": 0.45929579354281275,
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "uvo__-Z1X9B-F04Q__object_world_motion_direction__00",
  "video_id": "uvo__-Z1X9B-F04Q",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (person wearing a yellow high-visibility vest and orange pants) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
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   "backward",
   "down",
   "up",
   "forward"
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  "answer_index": 5,
  "frame_indices": [
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__-Z1X9B-F04Q/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__-Z1X9B-F04Q/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person wearing a yellow high-visibility vest and orange pants"
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   "bootstrap_direction_agreement": 1.0,
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "uvo__-Z7SlpjF3cE__object_world_motion_direction__00",
  "video_id": "uvo__-Z7SlpjF3cE",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (child in purple shirt) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "down",
  "options": [
   "left",
   "down",
   "up",
   "forward",
   "backward",
   "right"
  ],
  "answer_index": 1,
  "frame_indices": [
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  "frame_references": [
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    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__-Z7SlpjF3cE/rgb_5.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__-Z7SlpjF3cE/rgb_8.jpg"
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  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "child in purple shirt",
   "B": "man with short dark hair"
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  "evidence": {
   "displacement_start_camera_depths": [
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  "qa_id": "uvo__-cUGz7HAGBg__object_world_motion_direction__00",
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  "qa_id": "uvo__-cUGz7HAGBg__object_world_motion_direction__02",
  "video_id": "uvo__-cUGz7HAGBg",
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object B (person in dark clothing standing near the camel) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__-eYXPoMyrXw__camera_view_direction_change__00",
  "video_id": "uvo__-eYXPoMyrXw",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "uvo__-fTmHyOG-CY__camera_translation_direction__00",
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 {
  "qa_id": "uvo__-hl1mBY0_Yo__camera_object_distance_change__01",
  "video_id": "uvo__-hl1mBY0_Yo",
  "task": "camera_object_distance_change",
  "question": "From F2 to F5, did object A (person in dark clothing standing on the ice) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "qa_id": "uvo__-hzfAaWtzYw__object_world_motion_direction__00",
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  "question": "From F0 to F7, did object A (person in camouflage uniform walking in a line) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
  "qa_id": "uvo__-jPBBLagPv4__camera_view_direction_change__00",
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  "question": "From F0 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "uvo__-jaztOANmrw__camera_view_direction_change__00",
  "video_id": "uvo__-jaztOANmrw",
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  "question": "From F0 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__-jskAtCipd8__object_travel_distance_comparison__00",
  "video_id": "uvo__-jskAtCipd8",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F5 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (referee in black and white striped shirt and white cap) or B (football player in black jersey with number 8 and pink sleeve)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "A",
  "options": [
   "A",
   "B"
  ],
  "answer_index": 0,
  "frame_indices": [
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   6,
   7,
   8
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    "image_path": "cases/uvo__-jskAtCipd8/rgb_5.jpg"
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    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__-jskAtCipd8/rgb_6.jpg"
   },
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    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__-jskAtCipd8/rgb_7.jpg"
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__-jskAtCipd8/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g3",
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  "target_descriptions": {
   "A": "referee in black and white striped shirt and white cap",
   "B": "football player in black jersey with number 8 and pink sleeve"
  },
  "evidence": {
   "metrics": {
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    "distance_change_depths": -0.061757028102874756,
    "relative_distance_change": 0.1264655416792666,
    "travel_a_depths": 0.24654221534729004,
    "travel_b_depths": 0.07910380512475967,
    "travel_gap_depths": 0.16743841022253036,
    "travel_ratio": 3.1166922369720713,
    "distance_change_bootstrap95": [
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    "travel_a_minus_b_bootstrap95": [
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   },
   "record_key": "uvo__-jskAtCipd8__g3_g4__F5-F8",
   "anchors_a": [
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     0.31278079748153687
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    [
     -1.7838366031646729,
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     0.3410526514053345
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   ],
   "track_counts": [
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   ],
   "initial_track_counts": [
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   ],
   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_gap": 0.1,
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "max_fb_error_px": 2.0,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__-k1jF9CkQ2A__object_world_motion_direction__00",
  "video_id": "uvo__-k1jF9CkQ2A",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (person with short dark hair wearing a light grey t-shirt, viewed from behind) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "right",
   "up",
   "forward",
   "down",
   "left",
   "backward"
  ],
  "answer_index": 4,
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    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__-k1jF9CkQ2A/rgb_3.jpg"
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   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__-k1jF9CkQ2A/rgb_5.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g5"
  },
  "target_descriptions": {
   "A": "person with short dark hair wearing a light grey t-shirt, viewed from behind"
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "group": "HHH",
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 {
  "qa_id": "uvo__-kZa3gn6ojw__camera_view_direction_change__00",
  "video_id": "uvo__-kZa3gn6ojw",
  "task": "camera_view_direction_change",
  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__-kZa3gn6ojw/rgb_4.jpg"
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  "object_ids": [],
  "target_mapping": {
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  "target_descriptions": {
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 },
 {
  "qa_id": "uvo__-kZa3gn6ojw__camera_object_distance_change__01",
  "video_id": "uvo__-kZa3gn6ojw",
  "task": "camera_object_distance_change",
  "question": "From F2 to F4, did object A (skier in dark clothing) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__-kZa3gn6ojw/rgb_4.jpg"
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "skier in dark clothing"
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   "relative_change": 0.47254676675130863,
   "range_change_bootstrap95": [
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 },
 {
  "qa_id": "uvo__-kd_rdZ9Xaw__object_world_motion_direction__00",
  "video_id": "uvo__-kd_rdZ9Xaw",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object A (person in black shirt riding a horse) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "backward",
   "left",
   "right",
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  "frame_indices": [
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    "image_path": "cases/uvo__-kd_rdZ9Xaw/rgb_5.jpg"
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   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__-kd_rdZ9Xaw/rgb_7.jpg"
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  "object_ids": [
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  "target_mapping": {
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "sam_score": 0.8,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "uvo__-kd_rdZ9Xaw__camera_object_distance_change__01",
  "video_id": "uvo__-kd_rdZ9Xaw",
  "task": "camera_object_distance_change",
  "question": "From F5 to F7, did object A (person in black shirt riding a horse) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__-kd_rdZ9Xaw/rgb_7.jpg"
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   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 },
 {
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 {
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 {
  "qa_id": "uvo__-nbHB0eCJGQ__object_world_motion_direction__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "uvo__-pOpjuLHCqk__object_world_motion_direction__00",
  "video_id": "uvo__-pOpjuLHCqk",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (snowboarder wearing a red jacket and black helmet) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "quality_status": "provisional_automated_pass",
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  "group": "LHH",
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 {
  "qa_id": "uvo__-pOpjuLHCqk__camera_object_distance_change__01",
  "video_id": "uvo__-pOpjuLHCqk",
  "task": "camera_object_distance_change",
  "question": "From F5 to F8, did object A (snowboarder wearing a red jacket and black helmet) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__-pOpjuLHCqk/rgb_8.jpg"
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   "camera_turn_gap_deg": 8.0,
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 },
 {
  "qa_id": "uvo__-pOpjuLHCqk__object_world_motion_direction__02",
  "video_id": "uvo__-pOpjuLHCqk",
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  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object B (snowboarder wearing black patterned pants) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__-pOpjuLHCqk/rgb_8.jpg"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__-pOpjuLHCqk__camera_object_distance_change__03",
  "video_id": "uvo__-pOpjuLHCqk",
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  "question": "From F5 to F8, did object B (snowboarder wearing black patterned pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "image_path": "cases/uvo__-pOpjuLHCqk/rgb_8.jpg"
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 {
  "qa_id": "uvo__-pUiDc8X-To__camera_translation_direction__00",
  "video_id": "uvo__-pUiDc8X-To",
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  "question": "From F0 to F2, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "left",
   "down"
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 {
  "qa_id": "uvo__-pUiDc8X-To__object_travel_distance_comparison__01",
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  "question": "Over the sampled trajectory from F3 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (light-colored dog with a red harness) or B (child in a blue shirt and denim shorts)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "record_key": "uvo__-pUiDc8X-To__g1_g2__F3-F5",
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   "track_counts": [
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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 },
 {
  "qa_id": "uvo__-pWAEIT0HRo__camera_translation_direction__00",
  "video_id": "uvo__-pWAEIT0HRo",
  "task": "camera_translation_direction",
  "question": "From F1 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "up",
   "left",
   "backward",
   "right",
   "down",
   "forward"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 },
 {
  "qa_id": "uvo__-u59xQTOcmY__camera_translation_direction__00",
  "video_id": "uvo__-u59xQTOcmY",
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   "forward",
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   "right",
   "up",
   "backward"
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 {
  "qa_id": "uvo__-ujBLQ7LF40__camera_view_direction_change__00",
  "video_id": "uvo__-ujBLQ7LF40",
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  "question": "From F1 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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  "options": [
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   "up"
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  "frame_indices": [
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 {
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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  "frame_indices": [
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    "released_frame_index": 49,
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    "image_path": "cases/uvo__-vAOikxwtSI/rgb_8.jpg"
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  "qa_id": "uvo__-wHLbRfZPWM__camera_object_distance_change__01",
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  "question": "From F2 to F4, did object A (person in black shirt leading the camel) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "qa_id": "uvo__-xuVfmYKSsE__camera_translation_direction__00",
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  "question": "From F3 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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  "qa_id": "uvo__-xuVfmYKSsE__camera_view_direction_change__01",
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  "question": "From F1 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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  "qa_id": "uvo__-xuVfmYKSsE__camera_object_distance_change__02",
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  "question": "From F5 to F7, did object A (dark horse jumping over a fence) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__-yhePQ6NFEw__object_world_motion_direction__00",
  "video_id": "uvo__-yhePQ6NFEw",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (person in dark shirt and orange pants) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "uvo__-ytKvwrcXT4__camera_view_direction_change__00",
  "video_id": "uvo__-ytKvwrcXT4",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
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   "down"
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 {
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  "question": "From F4 to F7, did the 3D distance between object A (person in white shirt and black cap riding a bicycle) and object B (person in black shirt and helmet riding a bicycle) increase or decrease? Compare their separation at the two specified frames.",
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  "question": "Over the sampled trajectory from F4 through F7, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in white shirt and black cap riding a bicycle) or B (person in black shirt and helmet riding a bicycle)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "uvo__-zoJdjD91Uk__object_world_motion_direction__00",
  "video_id": "uvo__-zoJdjD91Uk",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F8, in which dominant direction did object A (person in dark clothing sitting in a boat) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "uvo__0-PpgRaT3Es__object_world_motion_direction__00",
  "video_id": "uvo__0-PpgRaT3Es",
  "task": "object_world_motion_direction",
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  "question": "Over the sampled trajectory from F3 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (man with long hair playing a cello, wearing a plaid shirt) or B (woman with short hair walking, wearing a white top and black cardigan)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
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  "qa_id": "uvo__0-uAUzHjPBo__object_pair_distance_change__00",
  "video_id": "uvo__0-uAUzHjPBo",
  "task": "object_pair_distance_change",
  "question": "From F5 to F8, did the 3D distance between object A (person in orange shirt) and object B (person in black shirt) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
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    "released_frame_index": 49,
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    "image_path": "cases/uvo__0-uAUzHjPBo/rgb_8.jpg"
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   "initial_track_counts": [
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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 {
  "qa_id": "uvo__00HGQ6LqJZ8__object_world_motion_direction__00",
  "video_id": "uvo__00HGQ6LqJZ8",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (person in white shirt and purple shorts) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "frame_indices": [
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__00HGQ6LqJZ8/rgb_8.jpg"
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 {
  "qa_id": "uvo__00HGQ6LqJZ8__camera_object_distance_change__01",
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  "question": "From F0 to F8, did object A (person in white shirt and purple shorts) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "seed_count": 256,
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  "qa_id": "uvo__00Klr-1s1FY__camera_view_direction_change__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "down"
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  "frame_indices": [
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 {
  "qa_id": "uvo__0347ZoDXyP0__camera_translation_direction__00",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "uvo__035LtPeUFTE__camera_view_direction_change__00",
  "video_id": "uvo__035LtPeUFTE",
  "task": "camera_view_direction_change",
  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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  "split": "development",
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 },
 {
  "qa_id": "uvo__03Ti8572JRY__camera_translation_direction__00",
  "video_id": "uvo__03Ti8572JRY",
  "task": "camera_translation_direction",
  "question": "From F0 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "up",
   "right",
   "forward",
   "backward"
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__03Ti8572JRY__object_world_motion_direction__01",
  "video_id": "uvo__03Ti8572JRY",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (person in orange jacket) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
   "up",
   "down",
   "forward",
   "right",
   "backward"
  ],
  "answer_index": 3,
  "frame_indices": [
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   3
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__03Ti8572JRY/rgb_0.jpg"
   },
   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__03Ti8572JRY/rgb_3.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in orange jacket"
  },
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    -0.02913447602174426,
    0.39906963904807397
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHL",
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 },
 {
  "qa_id": "uvo__03Ti8572JRY__camera_object_distance_change__02",
  "video_id": "uvo__03Ti8572JRY",
  "task": "camera_object_distance_change",
  "question": "From F0 to F3, did object A (person in orange jacket) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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   "closer"
  ],
  "answer_index": 0,
  "frame_indices": [
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   3
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    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__03Ti8572JRY/rgb_3.jpg"
   }
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  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in orange jacket"
  },
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   "ranges_depths": [
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    1.2123075830138978,
    1.284897169345892
   ],
   "delta_depths": 0.26352675218379895,
   "relative_change": 0.2580129086918491,
   "range_change_bootstrap95": [
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__04yiI0AYPPQ__object_world_motion_direction__00",
  "video_id": "uvo__04yiI0AYPPQ",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (person in red shirt and orange pants) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "left",
   "backward",
   "right",
   "up",
   "forward",
   "down"
  ],
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  "frame_indices": [
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   8
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    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__04yiI0AYPPQ/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__04yiI0AYPPQ/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1"
  },
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   "A": "person in red shirt and orange pants"
  },
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    0.09076730275420192
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
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 },
 {
  "qa_id": "uvo__05-73___szY__camera_object_distance_change__00",
  "video_id": "uvo__05-73___szY",
  "task": "camera_object_distance_change",
  "question": "From F6 to F8, did object B (person in dark blue jacket with white text on the back) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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   "farther"
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  "frame_indices": [
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   8
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    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__05-73___szY/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__05-73___szY/rgb_8.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1",
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  "target_descriptions": {
   "A": "person in red jacket standing at a microphone",
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   "ranges_depths": [
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "uvo__05-73___szY__object_pair_distance_change__01",
  "video_id": "uvo__05-73___szY",
  "task": "object_pair_distance_change",
  "question": "From F6 to F8, did the 3D distance between object A (person in red jacket standing at a microphone) and object B (person in dark blue jacket with white text on the back) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
   "increased",
   "decreased"
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  "answer_index": 1,
  "frame_indices": [
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   8
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    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__05-73___szY/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__05-73___szY/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1",
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   "A": "person in red jacket standing at a microphone",
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   "metrics": {
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    "travel_a_depths": 0.0066389054991304874,
    "travel_b_depths": 0.1731518805027008,
    "travel_gap_depths": 0.16651297500357032,
    "travel_ratio": 26.081389549132595,
    "distance_change_bootstrap95": [
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     -0.15274160578846932
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    "travel_a_minus_b_bootstrap95": [
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     -0.16423351354897023
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   },
   "record_key": "uvo__05-73___szY__g1_g4__F6-F8",
   "anchors_a": [
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    [
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     0.46575450897216797
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    [
     0.16403083503246307,
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     0.30419132113456726
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    [
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   "track_counts": [
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    104
   ],
   "initial_track_counts": [
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    256
   ],
   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 },
 {
  "qa_id": "uvo__06DYNQ5z00E__object_world_motion_direction__00",
  "video_id": "uvo__06DYNQ5z00E",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F6, in which dominant direction did object A (man in dark t-shirt and shorts) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "right",
   "left",
   "down",
   "backward",
   "up",
   "forward"
  ],
  "answer_index": 3,
  "frame_indices": [
   2,
   6
  ],
  "frame_references": [
   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/uvo__06DYNQ5z00E/rgb_2.jpg"
   },
   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__06DYNQ5z00E/rgb_6.jpg"
   }
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  "object_ids": [
   "g2"
  ],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "man in dark t-shirt and shorts",
   "B": "tracked object [g3]"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.144988813475583
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__06ZqVRSZ8wE__camera_view_direction_change__00",
  "video_id": "uvo__06ZqVRSZ8wE",
  "task": "camera_view_direction_change",
  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "down",
  "options": [
   "left",
   "up",
   "right",
   "down"
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  "frame_indices": [
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  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (person in dark jacket cross-country skiing) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "uvo__09sCD17AOyY__camera_view_direction_change__00",
  "video_id": "uvo__09sCD17AOyY",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "group": "LHL",
  "manual_review": false
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 {
  "qa_id": "uvo__0Bs9xxi8sxY__camera_object_distance_change__02",
  "video_id": "uvo__0Bs9xxi8sxY",
  "task": "camera_object_distance_change",
  "question": "From F1 to F5, did object A (person in black shirt and white shorts) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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   "closer"
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  "frame_indices": [
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    "released_frame_index": 31,
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    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__0Bs9xxi8sxY/rgb_5.jpg"
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  "target_mapping": {
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 {
  "qa_id": "uvo__0C3barg2QKI__camera_view_direction_change__00",
  "video_id": "uvo__0C3barg2QKI",
  "task": "camera_view_direction_change",
  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
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   "right",
   "up"
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  "frame_indices": [
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    "image_path": "cases/uvo__0C3barg2QKI/rgb_0.jpg"
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    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
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   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
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   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "localization_source": "GMOS MOS tracks",
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  "qa_id": "uvo__0DdXhnmSEbE__camera_translation_direction__00",
  "video_id": "uvo__0DdXhnmSEbE",
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  "question": "From F0 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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    "released_frame_name": "00019.jpg",
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    "image_path": "cases/uvo__0DdXhnmSEbE/rgb_3.jpg"
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "uvo__0DfXV_B7WvI__camera_view_direction_change__00",
  "video_id": "uvo__0DfXV_B7WvI",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "left"
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  "qa_id": "uvo__0E299kpi2ow__camera_translation_direction__00",
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   "up",
   "down",
   "backward"
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  "qa_id": "uvo__0Em6soMELS0__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object B (person in a white t-shirt and dark pants) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "down",
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   "left"
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  "qa_id": "uvo__0F1WmMXjml4__camera_view_direction_change__00",
  "video_id": "uvo__0F1WmMXjml4",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "frame_indices": [
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "qa_id": "uvo__0GpOe8tgrRo__camera_translation_direction__00",
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  "question": "From F3 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__0H1C-nllaWk__camera_view_direction_change__00",
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  "split": "development",
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  "qa_id": "uvo__0Hv8j33iHpU__camera_translation_direction__00",
  "video_id": "uvo__0Hv8j33iHpU",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__0Hv8j33iHpU__object_world_motion_direction__01",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "uvo__0Hv8j33iHpU__camera_object_distance_change__02",
  "video_id": "uvo__0Hv8j33iHpU",
  "task": "camera_object_distance_change",
  "question": "From F1 to F6, did object A (person in white top and orange pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__0Hzl3c8aUXI__object_world_motion_direction__00",
  "video_id": "uvo__0Hzl3c8aUXI",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (person in dark clothing standing on a grassy field) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__0JZm3c-ZhKo__object_travel_distance_comparison__00",
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  "question": "Over the sampled trajectory from F3 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in blue shirt and dark pants on a skateboard) or B (small child in dark clothing)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
  "qa_id": "uvo__0KNJtZdmFPI__camera_translation_direction__00",
  "video_id": "uvo__0KNJtZdmFPI",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "up",
   "backward",
   "forward"
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 {
  "qa_id": "uvo__0L3RDU3j3h4__camera_translation_direction__00",
  "video_id": "uvo__0L3RDU3j3h4",
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  "question": "From F0 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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 {
  "qa_id": "uvo__0L3RDU3j3h4__camera_view_direction_change__01",
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  "question": "From F1 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__0L4hQd-kGIQ__camera_view_direction_change__00",
  "video_id": "uvo__0L4hQd-kGIQ",
  "task": "camera_view_direction_change",
  "question": "From F0 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "uvo__0LFfu9I99VI__object_pair_distance_change__00",
  "video_id": "uvo__0LFfu9I99VI",
  "task": "object_pair_distance_change",
  "question": "From F3 to F6, did the 3D distance between object A (person in black top and shorts standing on a red segway) and object B (person in dark clothing riding a bicycle) increase or decrease? Compare their separation at the two specified frames.",
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 {
  "qa_id": "uvo__0LOJzsBnOpI__object_world_motion_direction__00",
  "video_id": "uvo__0LOJzsBnOpI",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F6, in which dominant direction did object A (person in dark clothing standing in a snowy field) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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    "image_path": "cases/uvo__0LOJzsBnOpI/rgb_0.jpg"
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    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__0LOJzsBnOpI/rgb_6.jpg"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "qa_id": "uvo__0MVxFYLQbic__camera_view_direction_change__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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    "image_path": "cases/uvo__0MVxFYLQbic/rgb_8.jpg"
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "uvo__0N1odE53B0g__camera_view_direction_change__00",
  "video_id": "uvo__0N1odE53B0g",
  "task": "camera_view_direction_change",
  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
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   {
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    "released_frame_index": 49,
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__0N1odE53B0g/rgb_8.jpg"
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 {
  "qa_id": "uvo__0NDp0DgOHxs__camera_translation_direction__00",
  "video_id": "uvo__0NDp0DgOHxs",
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  "question": "From F3 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "left"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "uvo__0NUTcXmBjRs__camera_translation_direction__00",
  "video_id": "uvo__0NUTcXmBjRs",
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  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "left",
   "up",
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   "down"
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    "image_path": "cases/uvo__0NUTcXmBjRs/rgb_8.jpg"
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (person in black jacket sitting on the snow) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "group": "LLH",
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 {
  "qa_id": "uvo__0aQFYMZ98Rc__object_world_motion_direction__00",
  "video_id": "uvo__0aQFYMZ98Rc",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F7, in which dominant direction did object A (person in black shirt and shorts) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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    "normalized_time": 0.8775510204081632,
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__0bjuCXoqRAk__camera_view_direction_change__00",
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  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "uvo__0bkmUXjwKaA__camera_view_direction_change__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object B (person in dark clothing standing on the ice) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "question": "From F2 to F5, did the 3D distance between object A (dark bird in flight) and object B (person in dark clothing standing on the ice) increase or decrease? Compare their separation at the two specified frames.",
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 {
  "qa_id": "uvo__0bkmUXjwKaA__object_travel_distance_comparison__03",
  "video_id": "uvo__0bkmUXjwKaA",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F2 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (dark bird in flight) or B (person in dark clothing standing on the ice)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0d5Y3zRJJkw__object_world_motion_direction__02",
  "video_id": "uvo__0d5Y3zRJJkw",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object B (brown horse with a rider) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "down",
   "left",
   "right",
   "up",
   "forward",
   "backward"
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  "frame_indices": [
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   8
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    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__0d5Y3zRJJkw/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0d5Y3zRJJkw/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g2"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "person riding a horse, wearing dark clothing",
   "B": "brown horse with a rider"
  },
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "uvo__0dDzds7o0BM__camera_translation_direction__00",
  "video_id": "uvo__0dDzds7o0BM",
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  "question": "From F1 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "forward",
   "up",
   "down",
   "left"
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  "frame_indices": [
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   8
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/uvo__0dDzds7o0BM/rgb_1.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0dDzds7o0BM/rgb_8.jpg"
   }
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
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  },
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0dDzds7o0BM__camera_object_distance_change__01",
  "video_id": "uvo__0dDzds7o0BM",
  "task": "camera_object_distance_change",
  "question": "From F1 to F8, did object A (person skiing on a snowy slope) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
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   "closer"
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  "frame_indices": [
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   8
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/uvo__0dDzds7o0BM/rgb_1.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0dDzds7o0BM/rgb_8.jpg"
   }
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  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person skiing on a snowy slope"
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   "ranges_depths": [
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    1.2357325357498552,
    1.1876425683022114,
    1.1466556381290562,
    1.0387091361566976,
    1.052147138060032,
    1.0187589870177187
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   "range_change_bootstrap95": [
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    -0.27925551636727813
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLL",
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 },
 {
  "qa_id": "uvo__0e2OdCAOwe8__object_world_motion_direction__00",
  "video_id": "uvo__0e2OdCAOwe8",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F4, in which dominant direction did object A (silhouette of a horse with a saddle) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "left",
   "right",
   "backward",
   "forward",
   "up",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
   1,
   4
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  "frame_references": [
   {
    "frame_index": 1,
    "released_frame_index": 5,
    "released_frame_name": "00006.jpg",
    "normalized_time": 0.125,
    "image_path": "cases/uvo__0e2OdCAOwe8/rgb_1.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 20,
    "released_frame_name": "00021.jpg",
    "normalized_time": 0.5,
    "image_path": "cases/uvo__0e2OdCAOwe8/rgb_4.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g2"
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  "target_descriptions": {
   "A": "silhouette of a horse with a saddle"
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  "evidence": {
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 {
  "qa_id": "uvo__0eRkpTGq5pA__object_world_motion_direction__00",
  "video_id": "uvo__0eRkpTGq5pA",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object A (man in white t-shirt and black shorts) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "left",
   "right",
   "up",
   "down",
   "backward",
   "forward"
  ],
  "answer_index": 4,
  "frame_indices": [
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   8
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  "frame_references": [
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    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__0eRkpTGq5pA/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0eRkpTGq5pA/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "man in white t-shirt and black shorts",
   "B": "man in dark blue long-sleeve shirt and black pants"
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  "evidence": {
   "displacement_start_camera_depths": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
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   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 {
  "qa_id": "uvo__0eRkpTGq5pA__camera_object_distance_change__01",
  "video_id": "uvo__0eRkpTGq5pA",
  "task": "camera_object_distance_change",
  "question": "From F3 to F8, did object A (man in white t-shirt and black shorts) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
   "farther",
   "closer"
  ],
  "answer_index": 1,
  "frame_indices": [
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   8
  ],
  "frame_references": [
   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0eRkpTGq5pA/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1",
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  "target_descriptions": {
   "A": "man in white t-shirt and black shorts",
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   "ranges_depths": [
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   "delta_depths": -0.23636373340957983,
   "relative_change": 0.22728373506856273,
   "range_change_bootstrap95": [
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  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "sam_score": 0.8,
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   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 },
 {
  "qa_id": "uvo__0eRkpTGq5pA__camera_object_distance_change__02",
  "video_id": "uvo__0eRkpTGq5pA",
  "task": "camera_object_distance_change",
  "question": "From F3 to F8, did object B (man in dark blue long-sleeve shirt and black pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
   "farther",
   "closer"
  ],
  "answer_index": 1,
  "frame_indices": [
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  "frame_references": [
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    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__0eRkpTGq5pA/rgb_3.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0eRkpTGq5pA/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "man in white t-shirt and black shorts",
   "B": "man in dark blue long-sleeve shirt and black pants"
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   "ranges_depths": [
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   "delta_depths": -0.24022089391689838,
   "relative_change": 0.21443261766337923,
   "range_change_bootstrap95": [
    -0.24390231784210759,
    -0.2364085297383171
   ]
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0eSFmX-NTIU__object_world_motion_direction__00",
  "video_id": "uvo__0eSFmX-NTIU",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (large dark elephant with riders on its back) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "up",
   "left",
   "forward",
   "right",
   "down",
   "backward"
  ],
  "answer_index": 5,
  "frame_indices": [
   6,
   8
  ],
  "frame_references": [
   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__0eSFmX-NTIU/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0eSFmX-NTIU/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "large dark elephant with riders on its back",
   "B": "person in light blue shirt standing near the elephant"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.017307004760661604,
    -0.10883073472896507
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   "dominant_component_bootstrap95": [
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    -0.10628104936083185
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0eSFmX-NTIU__camera_object_distance_change__01",
  "video_id": "uvo__0eSFmX-NTIU",
  "task": "camera_object_distance_change",
  "question": "From F6 to F8, did object A (large dark elephant with riders on its back) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
   "closer",
   "farther"
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  "answer_index": 0,
  "frame_indices": [
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   8
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  "frame_references": [
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    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__0eSFmX-NTIU/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0eSFmX-NTIU/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
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  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "large dark elephant with riders on its back",
   "B": "person in light blue shirt standing near the elephant"
  },
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   "ranges_depths": [
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    0.21095940359693938,
    0.17198972042897467
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   "delta_depths": -0.1132129165733605,
   "relative_change": 0.3969560652149003,
   "range_change_bootstrap95": [
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0eSFmX-NTIU__object_pair_distance_change__02",
  "video_id": "uvo__0eSFmX-NTIU",
  "task": "object_pair_distance_change",
  "question": "From F6 to F8, did the 3D distance between object A (large dark elephant with riders on its back) and object B (person in light blue shirt standing near the elephant) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
  "options": [
   "increased",
   "decreased"
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  "frame_indices": [
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   8
  ],
  "frame_references": [
   {
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    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__0eSFmX-NTIU/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0eSFmX-NTIU/rgb_8.jpg"
   }
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  "object_ids": [
   "g1",
   "g3"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "large dark elephant with riders on its back",
   "B": "person in light blue shirt standing near the elephant"
  },
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   "metrics": {
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     0.18581005930900574,
     0.3258240818977356
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    "distance_change_depths": 0.13030603528022766,
    "relative_distance_change": 0.6664655132073073,
    "travel_a_depths": 0.11511269956827164,
    "travel_b_depths": 0.18910813331604004,
    "travel_gap_depths": 0.0739954337477684,
    "travel_ratio": 1.642808604309404,
    "distance_change_bootstrap95": [
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     0.189266325160861
    ],
    "travel_a_minus_b_bootstrap95": [
     -0.12521299682557582,
     -0.020879540406167487
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   },
   "record_key": "uvo__0eSFmX-NTIU__g1_g3__F6-F8",
   "anchors_a": [
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     0.008749115280807018,
     0.2845799922943115
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    [
     -0.03125610575079918,
     0.0012416475219652057,
     0.21479707956314087
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    [
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     -0.002932003466412425,
     0.1771397888660431
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     -0.00940876454114914,
     0.035505760461091995,
     0.47318702936172485
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    [
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     0.028187841176986694,
     0.3943009674549103
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    [
     0.0477592870593071,
     0.0413135327398777,
     0.4939219653606415
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   ],
   "track_counts": [
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    39
   ],
   "initial_track_counts": [
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   ],
   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0e_dwOfB_bU__camera_view_direction_change__00",
  "video_id": "uvo__0e_dwOfB_bU",
  "task": "camera_view_direction_change",
  "question": "From F0 to F2, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
   "down",
   "up",
   "right",
   "left"
  ],
  "answer_index": 3,
  "frame_indices": [
   0,
   2
  ],
  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__0e_dwOfB_bU/rgb_0.jpg"
   },
   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/uvo__0e_dwOfB_bU/rgb_2.jpg"
   }
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  "object_ids": [],
  "target_mapping": {},
  "target_descriptions": {},
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   "yaw_deg": -29.80535800891404,
   "pitch_deg": 3.8212329560985037,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0ewQXPz9kWk__camera_translation_direction__00",
  "video_id": "uvo__0ewQXPz9kWk",
  "task": "camera_translation_direction",
  "question": "From F0 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "left",
   "forward",
   "down",
   "backward",
   "up",
   "right"
  ],
  "answer_index": 3,
  "frame_indices": [
   0,
   4
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  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__0ewQXPz9kWk/rgb_0.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__0ewQXPz9kWk/rgb_4.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "tracked object [g2]"
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  "evidence": {
   "displacement_start_camera_depths": [
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    -0.37244551559373956
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0fItLr9CtVg__camera_view_direction_change__00",
  "video_id": "uvo__0fItLr9CtVg",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
   "left",
   "down",
   "right",
   "up"
  ],
  "answer_index": 2,
  "frame_indices": [
   0,
   8
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  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__0fItLr9CtVg/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__0fItLr9CtVg/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "tracked object [g1]"
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   "yaw_deg": 39.76678886737627,
   "pitch_deg": -4.364427011253152,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__0hxF743aOl8__camera_view_direction_change__00",
  "video_id": "uvo__0hxF743aOl8",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
   "up",
   "down",
   "left",
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    "image_path": "cases/uvo__0jQaeta58yI/rgb_8.jpg"
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
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  "qa_id": "uvo__0nUL5Qi9k7Q__camera_view_direction_change__00",
  "video_id": "uvo__0nUL5Qi9k7Q",
  "task": "camera_view_direction_change",
  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
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   "bootstrap_direction_agreement": 0.95
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 {
  "qa_id": "uvo__0nd-Gc3HkmU__camera_view_direction_change__00",
  "video_id": "uvo__0nd-Gc3HkmU",
  "task": "camera_view_direction_change",
  "question": "From F0 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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 {
  "qa_id": "uvo__0oEt6N6POFI__camera_object_distance_change__00",
  "video_id": "uvo__0oEt6N6POFI",
  "task": "camera_object_distance_change",
  "question": "From F0 to F7, did object A (green tractor with a flatbed trailer) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__0oMNrDyWUEo__camera_translation_direction__00",
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  "question": "From F2 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__0pbMyICJUPw__camera_view_direction_change__00",
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  "question": "From F1 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
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 {
  "qa_id": "uvo__0pbMyICJUPw__object_world_motion_direction__01",
  "video_id": "uvo__0pbMyICJUPw",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (young boy with blond hair wearing a black t-shirt with a yellow batman logo) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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    "normalized_time": 1.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "question": "Over the sampled trajectory from F6 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (young boy with blond hair wearing a black t-shirt with a yellow batman logo) or B (young girl with a bob haircut wearing a pink patterned dress)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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    "travel_a_minus_b_bootstrap95": [
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   "record_key": "uvo__0pbMyICJUPw__g1_g2__F6-F8",
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 {
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 {
  "qa_id": "uvo__0sC7Ovz0h20__object_travel_distance_comparison__02",
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  "question": "Over the sampled trajectory from F2 through F6, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in white shirt and dark pants) or B (person in dark blue shirt and shorts)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "qa_id": "uvo__0sDydpFIu14__camera_translation_direction__00",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "uvo__0sDydpFIu14__camera_object_distance_change__02",
  "video_id": "uvo__0sDydpFIu14",
  "task": "camera_object_distance_change",
  "question": "From F0 to F4, did object A (person in dark clothing climbing an ice wall) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "farther"
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   "camera_turn_gap_deg": 8.0,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__0ssER51PqQc__camera_translation_direction__00",
  "video_id": "uvo__0ssER51PqQc",
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  "question": "From F6 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "up",
   "left"
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    "image_path": "cases/uvo__0ssER51PqQc/rgb_8.jpg"
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  "qa_id": "uvo__0t-YfvZNdks__camera_view_direction_change__00",
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  "question": "From F2 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
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  "qa_id": "uvo__0t-YfvZNdks__camera_object_distance_change__01",
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  "question": "From F0 to F8, did object A (person wearing a blue and white striped shirt riding a camel) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
  "qa_id": "uvo__0t7kdrXsS5Q__object_travel_distance_comparison__01",
  "video_id": "uvo__0t7kdrXsS5Q",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F5 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in dark clothing) or B (person in red shirt)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "video_id": "uvo__0wXbXtvFpUI",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   {
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    "released_frame_index": 49,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "video_id": "uvo__0wXbXtvFpUI",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__0wXbXtvFpUI__object_world_motion_direction__02",
  "video_id": "uvo__0wXbXtvFpUI",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (child in red shirt riding a bicycle) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   {
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    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__0wXbXtvFpUI/rgb_3.jpg"
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   "min_intervals": 2,
   "min_tracks": 32,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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  "group": "HHL",
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 {
  "qa_id": "uvo__0w_ShCl1xvg__camera_view_direction_change__00",
  "video_id": "uvo__0w_ShCl1xvg",
  "task": "camera_view_direction_change",
  "question": "From F4 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
  "answer": "left",
  "options": [
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   "down",
   "left",
   "up"
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  "frame_indices": [
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   7
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    "released_frame_index": 43,
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    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__0w_ShCl1xvg/rgb_7.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
   "A": "g5"
  },
  "target_descriptions": {
   "A": "young girl with a ponytail wearing a white long-sleeved shirt with a cartoon graphic and pink pants"
  },
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  "qa_id": "uvo__0w_ShCl1xvg__object_world_motion_direction__01",
  "video_id": "uvo__0w_ShCl1xvg",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (young girl with a ponytail wearing a white long-sleeved shirt with a cartoon graphic and pink pants) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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   "down",
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 {
  "qa_id": "uvo__0w_yy292WWM__object_world_motion_direction__00",
  "video_id": "uvo__0w_yy292WWM",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (shirtless man in dark shorts) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__0xOnw8cvcTQ__camera_view_direction_change__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "uvo__0xOnw8cvcTQ__object_pair_distance_change__01",
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  "task": "object_pair_distance_change",
  "question": "From F0 to F2, did the 3D distance between object A (person walking on the right side of the road) and object B (person in the middle distance near a blue shed) increase or decrease? Compare their separation at the two specified frames.",
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 {
  "qa_id": "uvo__0xOnw8cvcTQ__object_travel_distance_comparison__02",
  "video_id": "uvo__0xOnw8cvcTQ",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F0 through F2, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person walking on the right side of the road) or B (person in the middle distance near a blue shed)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "qa_id": "uvo__1-HzoNEwKO4__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (adult wearing a dark plaid shirt sitting behind a child on a sled) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__1-HzoNEwKO4__object_world_motion_direction__02",
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  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object B (child wearing an orange jacket sitting on a sled) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__1-HzoNEwKO4__camera_object_distance_change__03",
  "video_id": "uvo__1-HzoNEwKO4",
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  "qa_id": "uvo__1-Y5z-CE_B0__camera_translation_direction__00",
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  "qa_id": "uvo__1-yzOGhaXD8__camera_object_distance_change__00",
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  "qa_id": "uvo__11IUeetn2iM__camera_view_direction_change__00",
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  "question": "From F0 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "uvo__11i9oITK3_8__camera_view_direction_change__00",
  "video_id": "uvo__11i9oITK3_8",
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  "question": "From F2 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
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 {
  "qa_id": "uvo__12nT-AHwIdM__camera_translation_direction__00",
  "video_id": "uvo__12nT-AHwIdM",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__12nT-AHwIdM/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in red ski suit"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.00721291650619141,
    0.3369377268202131
   ],
   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__12nT-AHwIdM__camera_view_direction_change__01",
  "video_id": "uvo__12nT-AHwIdM",
  "task": "camera_view_direction_change",
  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
  "answer": "left",
  "options": [
   "right",
   "down",
   "left",
   "up"
  ],
  "answer_index": 2,
  "frame_indices": [
   3,
   8
  ],
  "frame_references": [
   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__12nT-AHwIdM/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__12nT-AHwIdM/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in red ski suit"
  },
  "evidence": {
   "yaw_deg": -17.932762628729805,
   "pitch_deg": 2.0548865341633937,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__12nT-AHwIdM__object_world_motion_direction__02",
  "video_id": "uvo__12nT-AHwIdM",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (person in red ski suit) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
   "forward",
   "up",
   "backward",
   "right",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
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   8
  ],
  "frame_references": [
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    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__12nT-AHwIdM/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__12nT-AHwIdM/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in red ski suit"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.049888485770049444,
    0.26635905454540065
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__12vWZg5BdG4__camera_translation_direction__00",
  "video_id": "uvo__12vWZg5BdG4",
  "task": "camera_translation_direction",
  "question": "From F4 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "down",
   "up",
   "forward",
   "backward",
   "left",
   "right"
  ],
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  "frame_indices": [
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   6
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
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    "image_path": "cases/uvo__12vWZg5BdG4/rgb_4.jpg"
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   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__12vWZg5BdG4/rgb_6.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "tracked object [g1]"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__13sohDAPS0g__object_world_motion_direction__00",
  "video_id": "uvo__13sohDAPS0g",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (person in black shirt with white logo) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "down",
   "up",
   "right",
   "left",
   "forward"
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  "frame_indices": [
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    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/uvo__13sohDAPS0g/rgb_2.jpg"
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   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__13sohDAPS0g/rgb_5.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in black shirt with white logo"
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__14tjqjjjAEI__camera_translation_direction__00",
  "video_id": "uvo__14tjqjjjAEI",
  "task": "camera_translation_direction",
  "question": "From F2 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "right",
   "left",
   "down",
   "forward",
   "up",
   "backward"
  ],
  "answer_index": 5,
  "frame_indices": [
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   4
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   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/uvo__14tjqjjjAEI/rgb_2.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__14tjqjjjAEI/rgb_4.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "person standing on a dock in the background",
   "B": "water skier in a black wetsuit holding a red and yellow object"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.0021868970464572067,
    -0.21418479601686274
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 },
 {
  "qa_id": "uvo__14tjqjjjAEI__object_pair_distance_change__01",
  "video_id": "uvo__14tjqjjjAEI",
  "task": "object_pair_distance_change",
  "question": "From F6 to F8, did the 3D distance between object A (person standing on a dock in the background) and object B (water skier in a black wetsuit holding a red and yellow object) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
  "options": [
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   "decreased"
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  "answer_index": 0,
  "frame_indices": [
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   8
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    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__14tjqjjjAEI/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__14tjqjjjAEI/rgb_8.jpg"
   }
  ],
  "object_ids": [
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   "g3"
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  "target_mapping": {
   "A": "g1",
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  "target_descriptions": {
   "A": "person standing on a dock in the background",
   "B": "water skier in a black wetsuit holding a red and yellow object"
  },
  "evidence": {
   "metrics": {
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    "distance_change_depths": 0.1899849772453308,
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    "travel_a_depths": 0.07996540516614914,
    "travel_b_depths": 0.22511300444602966,
    "travel_gap_depths": 0.14514759927988052,
    "travel_ratio": 2.815129917472415,
    "distance_change_bootstrap95": [
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    "travel_a_minus_b_bootstrap95": [
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   },
   "record_key": "uvo__14tjqjjjAEI__g1_g3__F6-F8",
   "anchors_a": [
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    [
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     -0.034929461777210236,
     0.6322384476661682
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    [
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     -0.04255865886807442,
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    [
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    [
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   ],
   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "group": "HLH",
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 {
  "qa_id": "uvo__14tjqjjjAEI__object_travel_distance_comparison__02",
  "video_id": "uvo__14tjqjjjAEI",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F6 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person standing on a dock in the background) or B (water skier in a black wetsuit holding a red and yellow object)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "B",
  "options": [
   "A",
   "B"
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  "answer_index": 1,
  "frame_indices": [
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   7,
   8
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  "frame_references": [
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    "released_frame_index": 43,
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    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__14tjqjjjAEI/rgb_7.jpg"
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__14tjqjjjAEI/rgb_8.jpg"
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  "object_ids": [
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   "g3"
  ],
  "target_mapping": {
   "A": "g1",
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  },
  "target_descriptions": {
   "A": "person standing on a dock in the background",
   "B": "water skier in a black wetsuit holding a red and yellow object"
  },
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   "metrics": {
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     0.6384063363075256,
     0.7226880788803101
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    "distance_change_depths": 0.1899849772453308,
    "relative_distance_change": 0.3566432721383196,
    "travel_a_depths": 0.07996540516614914,
    "travel_b_depths": 0.22511300444602966,
    "travel_gap_depths": 0.14514759927988052,
    "travel_ratio": 2.815129917472415,
    "distance_change_bootstrap95": [
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    "travel_a_minus_b_bootstrap95": [
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   "record_key": "uvo__14tjqjjjAEI__g1_g3__F6-F8",
   "anchors_a": [
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     -0.03585958480834961,
     0.6729181408882141
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   "track_counts": [
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   "initial_track_counts": [
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    250
   ],
   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 },
 {
  "qa_id": "uvo__15JRTW-QAYA__camera_object_distance_change__00",
  "video_id": "uvo__15JRTW-QAYA",
  "task": "camera_object_distance_change",
  "question": "From F3 to F8, did object A (person in dark clothing sitting on a camel) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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  "frame_indices": [
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    "released_frame_index": 49,
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__15JRTW-QAYA/rgb_8.jpg"
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "uvo__15JRTW-QAYA__camera_object_distance_change__01",
  "video_id": "uvo__15JRTW-QAYA",
  "task": "camera_object_distance_change",
  "question": "From F3 to F8, did object B (person in green shirt sitting on a camel) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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   "closer"
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  "frame_indices": [
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__15JRTW-QAYA/rgb_8.jpg"
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  "target_mapping": {
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   "camera_turn_gap_deg": 8.0,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "sam_score": 0.8,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 },
 {
  "qa_id": "uvo__15LSh_XPils__object_world_motion_direction__00",
  "video_id": "uvo__15LSh_XPils",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (orange and blue paraglider canopy) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "right",
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   "backward",
   "right",
   "left",
   "down"
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    "image_path": "cases/uvo__15LSh_XPils/rgb_3.jpg"
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    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__15LSh_XPils/rgb_5.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1",
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   "A": "orange and blue paraglider canopy",
   "B": "tracked object [g2]"
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "sam_score": 0.8,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 },
 {
  "qa_id": "uvo__15SqU9wyekc__camera_view_direction_change__00",
  "video_id": "uvo__15SqU9wyekc",
  "task": "camera_view_direction_change",
  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
  "answer": "left",
  "options": [
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   "right",
   "up"
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  "frame_indices": [
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__15SqU9wyekc/rgb_8.jpg"
   }
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   "A": "tracked object [g1]"
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   "direction_dominance": 2.0,
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "travel_max_min": 0.2,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "group": "LHL",
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 },
 {
  "qa_id": "uvo__161EH1x7Uxc__camera_translation_direction__00",
  "video_id": "uvo__161EH1x7Uxc",
  "task": "camera_translation_direction",
  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "forward",
   "down",
   "backward",
   "up"
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  "frame_indices": [
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    "image_path": "cases/uvo__161EH1x7Uxc/rgb_8.jpg"
   }
  ],
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  "target_mapping": {
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  },
  "target_descriptions": {
   "A": "person standing on the side of the road"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__161EH1x7Uxc__object_world_motion_direction__01",
  "video_id": "uvo__161EH1x7Uxc",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (person standing on the side of the road) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "forward",
   "right",
   "left",
   "up",
   "backward",
   "down"
  ],
  "answer_index": 0,
  "frame_indices": [
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   {
    "frame_index": 4,
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  "target_mapping": {
   "A": "g2"
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  "target_descriptions": {
   "A": "person standing on the side of the road"
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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  "qa_id": "uvo__168HoJooFQA__camera_view_direction_change__00",
  "video_id": "uvo__168HoJooFQA",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "options": [
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  "frame_indices": [
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    "released_frame_index": 99,
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 {
  "qa_id": "uvo__16a65wnUux0__object_world_motion_direction__00",
  "video_id": "uvo__16a65wnUux0",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object B (person in beige coat and red hat) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 43,
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    "normalized_time": 0.8775510204081632,
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  "qa_id": "uvo__16dDTSncELA__camera_translation_direction__00",
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  "task": "camera_translation_direction",
  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "forward",
   "left",
   "right",
   "down",
   "up"
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  "frame_indices": [
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    "released_frame_index": 100,
    "released_frame_name": "00101.jpg",
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    "image_path": "cases/uvo__16dDTSncELA/rgb_8.jpg"
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   "left"
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  "qa_id": "uvo__16dDTSncELA__object_world_motion_direction__02",
  "video_id": "uvo__16dDTSncELA",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (person in red shirt walking away) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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   {
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    "released_frame_index": 75,
    "released_frame_name": "00076.jpg",
    "normalized_time": 0.75,
    "image_path": "cases/uvo__16dDTSncELA/rgb_6.jpg"
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 {
  "qa_id": "uvo__16dDTSncELA__object_world_motion_direction__03",
  "video_id": "uvo__16dDTSncELA",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object B (person in blue shirt sitting in a wheelchair) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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   "up",
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   "up"
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 {
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 {
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  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object B (person in dark shirt and red shorts in the center) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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  "question": "From F5 to F8, did the 3D distance between object A (person in white shirt and dark shorts on the left side) and object B (person in dark shirt and red shorts in the center) increase or decrease? Compare their separation at the two specified frames.",
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  "geometry_thresholds_unchanged": true,
  "group": "LLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__19nwtcDcTzA__object_travel_distance_comparison__03",
  "video_id": "uvo__19nwtcDcTzA",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F5 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in white shirt and dark shorts on the left side) or B (person in dark shirt and red shorts in the center)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "B",
  "options": [
   "A",
   "B"
  ],
  "answer_index": 1,
  "frame_indices": [
   5,
   6,
   7,
   8
  ],
  "frame_references": [
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    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__19nwtcDcTzA/rgb_5.jpg"
   },
   {
    "frame_index": 6,
    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__19nwtcDcTzA/rgb_6.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__19nwtcDcTzA/rgb_7.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__19nwtcDcTzA/rgb_8.jpg"
   }
  ],
  "object_ids": [
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   "g3"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "person in white shirt and dark shorts on the left side",
   "B": "person in dark shirt and red shorts in the center"
  },
  "evidence": {
   "metrics": {
    "distance_depths": [
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     0.34479084610939026,
     0.4029747545719147,
     0.4733143150806427
    ],
    "distance_change_depths": 0.14129051566123962,
    "relative_distance_change": 0.4255433372797636,
    "travel_a_depths": 0.030329234898090363,
    "travel_b_depths": 0.28215640783309937,
    "travel_gap_depths": 0.251827172935009,
    "travel_ratio": 9.303116573206564,
    "distance_change_bootstrap95": [
     0.13594434261322022,
     0.14923426285386085
    ],
    "travel_a_minus_b_bootstrap95": [
     -0.25914269909262655,
     -0.24378860034048558
    ]
   },
   "record_key": "uvo__19nwtcDcTzA__g1_g3__F5-F8",
   "anchors_a": [
    [
     -0.4427541196346283,
     -0.04353842884302139,
     1.2389981746673584
    ],
    [
     -0.44114065170288086,
     -0.04272976517677307,
     1.2326018810272217
    ],
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     -0.4427105486392975,
     -0.04260292276740074,
     1.2362090349197388
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     -0.04600962623953819,
     1.223387360572815
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   ],
   "anchors_b": [
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     -0.11523044854402542,
     -0.06307468563318253,
     1.1881417036056519
    ],
    [
     -0.11271730810403824,
     -0.05176569148898125,
     1.1280208826065063
    ],
    [
     -0.09123891592025757,
     -0.03140057623386383,
     1.03940749168396
    ],
    [
     -0.0702819749712944,
     -0.0072943237610161304,
     0.9159696698188782
    ]
   ],
   "track_counts": [
    160,
    39
   ],
   "initial_track_counts": [
    256,
    256
   ],
   "track_survival": [
    0.625,
    0.15234375
   ],
   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1ALF46LXwUU__object_world_motion_direction__00",
  "video_id": "uvo__1ALF46LXwUU",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F4, in which dominant direction did object A (person in black shirt and white shorts) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "backward",
   "down",
   "up",
   "right",
   "forward",
   "left"
  ],
  "answer_index": 4,
  "frame_indices": [
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   4
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__1ALF46LXwUU/rgb_0.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__1ALF46LXwUU/rgb_4.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in black shirt and white shorts"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.03023039403499153,
    0.18345463202654014
   ],
   "dominant_component_bootstrap95": [
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    0.18902531569418182
   ],
   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1ALF46LXwUU__camera_object_distance_change__01",
  "video_id": "uvo__1ALF46LXwUU",
  "task": "camera_object_distance_change",
  "question": "From F0 to F4, did object A (person in black shirt and white shorts) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
   "farther",
   "closer"
  ],
  "answer_index": 0,
  "frame_indices": [
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   4
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    "normalized_time": 0.0,
    "image_path": "cases/uvo__1ALF46LXwUU/rgb_0.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__1ALF46LXwUU/rgb_4.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in black shirt and white shorts"
  },
  "evidence": {
   "ranges_depths": [
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    0.5047368904980051,
    0.5289792383981253,
    0.5678026594283958,
    0.6870215880152448
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   "delta_depths": 0.173970678460593,
   "relative_change": 0.3390904785874102,
   "range_change_bootstrap95": [
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    0.179464554805339
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  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1AXnss7WdJI__camera_view_direction_change__00",
  "video_id": "uvo__1AXnss7WdJI",
  "task": "camera_view_direction_change",
  "question": "From F1 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
  "answer": "left",
  "options": [
   "right",
   "down",
   "left",
   "up"
  ],
  "answer_index": 2,
  "frame_indices": [
   1,
   8
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  "frame_references": [
   {
    "frame_index": 1,
    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/uvo__1AXnss7WdJI/rgb_1.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__1AXnss7WdJI/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {},
  "target_descriptions": {},
  "evidence": {
   "yaw_deg": -45.50840565699455,
   "pitch_deg": 6.053133890452845,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1C4SkwtFef0__object_world_motion_direction__00",
  "video_id": "uvo__1C4SkwtFef0",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object B (man in blue sleeveless shirt walking on the sidewalk) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "up",
   "backward",
   "left",
   "forward",
   "right",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
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   4
  ],
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   {
    "frame_index": 2,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/uvo__1C4SkwtFef0/rgb_2.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__1C4SkwtFef0/rgb_4.jpg"
   }
  ],
  "object_ids": [
   "g4"
  ],
  "target_mapping": {
   "A": "g3",
   "B": "g4"
  },
  "target_descriptions": {
   "A": "man in black shirt and cap standing near a musician",
   "B": "man in blue sleeveless shirt walking on the sidewalk"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    0.06160521362722163,
    -0.3265155952456246
   ],
   "dominant_component_bootstrap95": [
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    -0.324267583480613
   ],
   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1C4SkwtFef0__camera_object_distance_change__01",
  "video_id": "uvo__1C4SkwtFef0",
  "task": "camera_object_distance_change",
  "question": "From F2 to F4, did object B (man in blue sleeveless shirt walking on the sidewalk) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
   "closer",
   "farther"
  ],
  "answer_index": 0,
  "frame_indices": [
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   4
  ],
  "frame_references": [
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    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/uvo__1C4SkwtFef0/rgb_2.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__1C4SkwtFef0/rgb_4.jpg"
   }
  ],
  "object_ids": [
   "g4"
  ],
  "target_mapping": {
   "A": "g3",
   "B": "g4"
  },
  "target_descriptions": {
   "A": "man in black shirt and cap standing near a musician",
   "B": "man in blue sleeveless shirt walking on the sidewalk"
  },
  "evidence": {
   "ranges_depths": [
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    1.3443318446939574,
    1.1952375380040217
   ],
   "delta_depths": -0.32952772984265954,
   "relative_change": 0.21611702259458493,
   "range_change_bootstrap95": [
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    -0.32704887896878976
   ]
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1C4SkwtFef0__object_pair_distance_change__02",
  "video_id": "uvo__1C4SkwtFef0",
  "task": "object_pair_distance_change",
  "question": "From F2 to F4, did the 3D distance between object A (man in black shirt and cap standing near a musician) and object B (man in blue sleeveless shirt walking on the sidewalk) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
   "increased",
   "decreased"
  ],
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 {
  "qa_id": "uvo__1EdD1OkUrLs__object_pair_distance_change__01",
  "video_id": "uvo__1EdD1OkUrLs",
  "task": "object_pair_distance_change",
  "question": "From F6 to F8, did the 3D distance between object A (man in green jersey and khaki pants) and object B (boy in black hoodie seen from behind) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
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   "decreased"
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  "answer_index": 1,
  "frame_indices": [
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   8
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    "released_frame_index": 49,
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    "image_path": "cases/uvo__1EdD1OkUrLs/rgb_8.jpg"
   }
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  "object_ids": [
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   "g3"
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  "target_mapping": {
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    "travel_a_depths": 0.11976203322410583,
    "travel_b_depths": 0.019508007913827896,
    "travel_gap_depths": 0.10025402531027794,
    "travel_ratio": 6.1391216239570365,
    "distance_change_bootstrap95": [
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    "travel_a_minus_b_bootstrap95": [
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     0.026038682088255882,
     0.23738572001457214
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     0.03100690245628357,
     0.22484342753887177
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     0.027430426329374313,
     0.22470207512378693
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   "track_counts": [
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    227
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   "initial_track_counts": [
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    256
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   "track_survival": [
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   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 },
 {
  "qa_id": "uvo__1Ep1RNI0b0U__camera_translation_direction__00",
  "video_id": "uvo__1Ep1RNI0b0U",
  "task": "camera_translation_direction",
  "question": "From F1 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "right",
   "forward",
   "up",
   "backward",
   "down",
   "left"
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  "answer_index": 3,
  "frame_indices": [
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   8
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  "frame_references": [
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    "normalized_time": 0.12244897959183673,
    "image_path": "cases/uvo__1Ep1RNI0b0U/rgb_1.jpg"
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__1Ep1RNI0b0U/rgb_8.jpg"
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  "target_mapping": {
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  "target_descriptions": {
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   "pair_range_abs": 0.1,
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "uvo__1Ep1RNI0b0U__camera_object_distance_change__01",
  "video_id": "uvo__1Ep1RNI0b0U",
  "task": "camera_object_distance_change",
  "question": "From F1 to F6, did object A (orange and teal parachute canopy) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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    "normalized_time": 0.7551020408163265,
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
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   "travel_ratio": 1.5,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "uvo__1Evf8RZdLOo__camera_translation_direction__00",
  "video_id": "uvo__1Evf8RZdLOo",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "left"
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  "frame_indices": [
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    "image_path": "cases/uvo__1Evf8RZdLOo/rgb_8.jpg"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "seed_count": 256,
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  "qa_id": "uvo__1Evf8RZdLOo__camera_view_direction_change__01",
  "video_id": "uvo__1Evf8RZdLOo",
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  "question": "From F4 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
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    "image_path": "cases/uvo__1Evf8RZdLOo/rgb_8.jpg"
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 {
  "qa_id": "uvo__1F8DhAMABpU__camera_view_direction_change__00",
  "video_id": "uvo__1F8DhAMABpU",
  "task": "camera_view_direction_change",
  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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  "frame_indices": [
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    "normalized_time": 0.75,
    "image_path": "cases/uvo__1F8DhAMABpU/rgb_6.jpg"
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 },
 {
  "qa_id": "uvo__1FaC6nzR2eY__object_world_motion_direction__00",
  "video_id": "uvo__1FaC6nzR2eY",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object A (black dog running on a snowy path) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "down",
   "up",
   "right",
   "left",
   "backward",
   "forward"
  ],
  "answer_index": 4,
  "frame_indices": [
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   {
    "frame_index": 8,
    "released_frame_index": 49,
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__1FaC6nzR2eY/rgb_8.jpg"
   }
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  "target_mapping": {
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 {
  "qa_id": "uvo__1FaC6nzR2eY__camera_object_distance_change__01",
  "video_id": "uvo__1FaC6nzR2eY",
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  "question": "From F3 to F8, did object A (black dog running on a snowy path) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "image_path": "cases/uvo__1FaC6nzR2eY/rgb_8.jpg"
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  "qa_id": "uvo__1Hi1TB8Pjfs__camera_view_direction_change__00",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "uvo__1HyfE5t-h5o__camera_translation_direction__00",
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 {
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  "question": "After compensating for camera motion from F3 to F7, in which dominant direction did object A (person in orange shirt riding a motorcycle) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "uvo__1IkQds-3rCY__camera_view_direction_change__00",
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  "question": "From F4 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
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   "pair_range_relative": 0.2,
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   "min_intervals": 2,
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  "video_id": "uvo__1J109MGAspk",
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  "question": "From F4 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
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  "options": [
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 49,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "video_id": "uvo__1JUL-MDQf3k",
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  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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    "released_frame_name": "00032.jpg",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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    "image_path": "cases/uvo__1JhYwcmxvtY/rgb_8.jpg"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "uvo__1K4FIaiPL6I__camera_translation_direction__00",
  "video_id": "uvo__1K4FIaiPL6I",
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  "question": "From F0 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "down",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "question": "After compensating for camera motion from F0 to F5, in which dominant direction did object A (person wearing an orange safety vest and camouflage pants) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   {
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    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__1K4FIaiPL6I/rgb_5.jpg"
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "qa_id": "uvo__1K5OXfQF4NA__camera_translation_direction__00",
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  "question": "From F2 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1SscAwdPasM__object_world_motion_direction__00",
  "video_id": "uvo__1SscAwdPasM",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object A (person in red jacket and black pants) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "forward",
   "backward",
   "left",
   "right",
   "down",
   "up"
  ],
  "answer_index": 1,
  "frame_indices": [
   3,
   8
  ],
  "frame_references": [
   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__1SscAwdPasM/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__1SscAwdPasM/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in red jacket and black pants"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    0.07940863524036565,
    -0.8681691003733796
   ],
   "dominant_component_bootstrap95": [
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    -0.8604547025665206
   ],
   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1SscAwdPasM__camera_object_distance_change__01",
  "video_id": "uvo__1SscAwdPasM",
  "task": "camera_object_distance_change",
  "question": "From F3 to F8, did object A (person in red jacket and black pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
   "closer",
   "farther"
  ],
  "answer_index": 0,
  "frame_indices": [
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   8
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  "frame_references": [
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    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__1SscAwdPasM/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__1SscAwdPasM/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in red jacket and black pants"
  },
  "evidence": {
   "ranges_depths": [
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    1.6848175349450631,
    1.4941839904177556,
    1.2713030419517222,
    1.0780469751577455,
    0.9071545267801805
   ],
   "delta_depths": -0.8837439658153942,
   "relative_change": 0.49346401790453875,
   "range_change_bootstrap95": [
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    -0.875420012451071
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  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
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 },
 {
  "qa_id": "uvo__1U3F4rtpMHs__camera_translation_direction__00",
  "video_id": "uvo__1U3F4rtpMHs",
  "task": "camera_translation_direction",
  "question": "From F4 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "down",
   "right",
   "left",
   "up",
   "backward",
   "forward"
  ],
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  "frame_indices": [
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   8
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
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    "image_path": "cases/uvo__1U3F4rtpMHs/rgb_4.jpg"
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    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__1U3F4rtpMHs/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "horse with large ears seen from a first-person perspective",
   "B": "brown horse with a rider wearing a light blue shirt"
  },
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    -0.16442986094310394,
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1U3F4rtpMHs__object_world_motion_direction__02",
  "video_id": "uvo__1U3F4rtpMHs",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F7, in which dominant direction did object B (brown horse with a rider wearing a light blue shirt) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "down",
   "left",
   "right",
   "up",
   "forward",
   "backward"
  ],
  "answer_index": 4,
  "frame_indices": [
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   7
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    "frame_index": 4,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__1U3F4rtpMHs/rgb_4.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__1U3F4rtpMHs/rgb_7.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1",
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  "target_descriptions": {
   "A": "horse with large ears seen from a first-person perspective",
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
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 },
 {
  "qa_id": "uvo__1U3F4rtpMHs__object_pair_distance_change__03",
  "video_id": "uvo__1U3F4rtpMHs",
  "task": "object_pair_distance_change",
  "question": "From F4 to F7, did the 3D distance between object A (horse with large ears seen from a first-person perspective) and object B (brown horse with a rider wearing a light blue shirt) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
   "increased",
   "decreased"
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  "answer_index": 1,
  "frame_indices": [
   4,
   7
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  "frame_references": [
   {
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.4897959183673469,
    "image_path": "cases/uvo__1U3F4rtpMHs/rgb_4.jpg"
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   {
    "frame_index": 7,
    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/uvo__1U3F4rtpMHs/rgb_7.jpg"
   }
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  "object_ids": [
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   "g2"
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  "target_mapping": {
   "A": "g1",
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  "target_descriptions": {
   "A": "horse with large ears seen from a first-person perspective",
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   "metrics": {
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    "distance_change_depths": -0.15246349573135376,
    "relative_distance_change": 0.2028874451152155,
    "travel_a_depths": 0.43940994143486023,
    "travel_b_depths": 0.28571993112564087,
    "travel_gap_depths": 0.15369001030921936,
    "travel_ratio": 1.5379044076614892,
    "distance_change_bootstrap95": [
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     -0.1438894435763359
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    "travel_a_minus_b_bootstrap95": [
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     0.16225470900535582
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   },
   "record_key": "uvo__1U3F4rtpMHs__g1_g2__F4-F7",
   "anchors_a": [
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    [
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     -0.08533819764852524,
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   "anchors_b": [
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    [
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    [
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    [
     1.496650218963623,
     -0.18203727900981903,
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   ],
   "track_counts": [
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    144
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   "initial_track_counts": [
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    255
   ],
   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__1WMulo84kBY__camera_view_direction_change__00",
  "video_id": "uvo__1WMulo84kBY",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
   "down",
   "left",
   "right",
   "up"
  ],
  "answer_index": 2,
  "frame_indices": [
   0,
   8
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  "frame_references": [
   {
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__1WMulo84kBY/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__1WMulo84kBY/rgb_8.jpg"
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  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "tracked object [g1]"
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   "pitch_deg": -1.8246509290148978,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "qa_id": "uvo__1WOies49wDc__object_world_motion_direction__00",
  "video_id": "uvo__1WOies49wDc",
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  "question": "From F3 to F6, did object A (green and yellow striped parasail canopy) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "uvo__1dRL83xXz4M__camera_translation_direction__00",
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    "image_path": "cases/uvo__1dRL83xXz4M/rgb_5.jpg"
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  "object_ids": [],
  "target_mapping": {
   "A": "g2"
  },
  "target_descriptions": {
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  },
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   "pitch_deg": 7.52069134251929,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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  "group": "HHL",
  "manual_review": false
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 {
  "qa_id": "uvo__1damFpFAznY__object_world_motion_direction__00",
  "video_id": "uvo__1damFpFAznY",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (man in blue and white shirt holding a long pole) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "down",
   "backward",
   "up",
   "forward",
   "right"
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  "frame_indices": [
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   8
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    "image_path": "cases/uvo__1damFpFAznY/rgb_5.jpg"
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__1damFpFAznY/rgb_8.jpg"
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  "target_mapping": {
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   "B": "g3"
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   "B": "man in white shirt and dark shorts walking on the track"
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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 {
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  "question": "From F5 to F8, did object A (man in blue and white shirt holding a long pole) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "image_path": "cases/uvo__1damFpFAznY/rgb_8.jpg"
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   "object_translation": 0.1,
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
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   "travel_ratio": 1.5,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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 },
 {
  "qa_id": "uvo__1damFpFAznY__object_world_motion_direction__02",
  "video_id": "uvo__1damFpFAznY",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object B (man in white shirt and dark shorts walking on the track) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "left",
   "down",
   "backward",
   "forward"
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  "frame_indices": [
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    "image_path": "cases/uvo__1damFpFAznY/rgb_5.jpg"
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    "released_frame_index": 49,
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__1damFpFAznY/rgb_8.jpg"
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   "camera_turn_gap_deg": 8.0,
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   "seed_count": 256,
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  "qa_id": "uvo__1damFpFAznY__object_pair_distance_change__03",
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  "task": "object_pair_distance_change",
  "question": "From F5 to F8, did the 3D distance between object A (man in blue and white shirt holding a long pole) and object B (man in white shirt and dark shorts walking on the track) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
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    "image_path": "cases/uvo__1damFpFAznY/rgb_5.jpg"
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    "released_frame_index": 49,
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    "image_path": "cases/uvo__1damFpFAznY/rgb_8.jpg"
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    "travel_b_depths": 0.13269399106502533,
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    "travel_ratio": 1.0717103366852827,
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    "travel_a_minus_b_bootstrap95": [
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   "record_key": "uvo__1damFpFAznY__g1_g3__F5-F8",
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   "track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 },
 {
  "qa_id": "uvo__1dmwnxQIC0I__camera_view_direction_change__00",
  "video_id": "uvo__1dmwnxQIC0I",
  "task": "camera_view_direction_change",
  "question": "From F0 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
   "down",
   "up",
   "left",
   "right"
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  "answer_index": 2,
  "frame_indices": [
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   {
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    "image_path": "cases/uvo__1dmwnxQIC0I/rgb_0.jpg"
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   {
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   "camera_translation": 0.1,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "group": "LHL",
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 },
 {
  "qa_id": "uvo__1dvRF5N2BIs__object_world_motion_direction__00",
  "video_id": "uvo__1dvRF5N2BIs",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object A (skier in dark clothing) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "left",
   "up",
   "right"
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  "answer_index": 0,
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  "qa_id": "uvo__1l84CF_6o5w__object_world_motion_direction__02",
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  "question": "After compensating for camera motion from F0 to F5, in which dominant direction did object A (person in dark jacket and orange pants riding a snowmobile) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__1l84CF_6o5w__object_world_motion_direction__04",
  "video_id": "uvo__1l84CF_6o5w",
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  "question": "After compensating for camera motion from F0 to F5, in which dominant direction did object B (black and yellow snowmobile) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "video_id": "uvo__1mBPyRkZefY",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "split": "development",
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 {
  "qa_id": "uvo__1nVmIs3U_l8__camera_view_direction_change__00",
  "video_id": "uvo__1nVmIs3U_l8",
  "task": "camera_view_direction_change",
  "question": "From F3 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
  "answer": "left",
  "options": [
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   "down",
   "up",
   "right"
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  "frame_indices": [
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   "travel_ratio": 1.5,
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   "min_intervals": 2,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "group": "LLH",
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 {
  "qa_id": "uvo__1rRZZKnWCo8__camera_view_direction_change__00",
  "video_id": "uvo__1rRZZKnWCo8",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "up"
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  "frame_indices": [
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  "qa_id": "uvo__1t3OlVUHTtY__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F4 to F7, in which dominant direction did object B (person in the water) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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   "seed_count": 256,
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  "split": "development",
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (person in red shirt) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object B (person in black shirt with white text) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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  "question": "From F6 to F8, did object B (person in black shirt with white text) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "question": "Over the sampled trajectory from F6 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in red shirt) or B (person in black shirt with white text)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   {
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__1zBfMrwszgc/rgb_8.jpg"
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   "record_key": "uvo__1zBfMrwszgc__g4_g5__F6-F8",
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 {
  "qa_id": "uvo__2-KpBW7QNIs__object_pair_distance_change__00",
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  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (person in black jacket and orange pants) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__276U2IfXU6s__camera_view_direction_change__00",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "uvo__2B8s6prCDIg__object_travel_distance_comparison__00",
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  "question": "Over the sampled trajectory from F0 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person wearing a red cap and black harness vest) or B (green and red paraglider canopy in the sky)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "video_id": "uvo__2ElBbDU9NpE",
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  "question": "From F0 to F2, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "question": "From F0 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object A (person in dark clothing) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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    "normalized_time": 1.0,
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   "seed_count": 256,
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  "question": "From F0 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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    "normalized_time": 0.3673469387755102,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "uvo__2NeC5vzrP20__camera_translation_direction__00",
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  "question": "From F3 to F7, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "group": "HHH",
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 {
  "qa_id": "uvo__2QeFt-2QcQw__camera_view_direction_change__00",
  "video_id": "uvo__2QeFt-2QcQw",
  "task": "camera_view_direction_change",
  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
  "answer": "right",
  "options": [
   "down",
   "left",
   "right",
   "up"
  ],
  "answer_index": 2,
  "frame_indices": [
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   8
  ],
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    "image_path": "cases/uvo__2QeFt-2QcQw/rgb_8.jpg"
   }
  ],
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   "B": "g5"
  },
  "target_descriptions": {
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  },
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  },
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 },
 {
  "qa_id": "uvo__2ZeGylHqo7M__object_world_motion_direction__00",
  "video_id": "uvo__2ZeGylHqo7M",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object B (person in red shirt and white cap) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "left",
   "down",
   "up",
   "backward"
  ],
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   }
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  },
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  },
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 {
  "qa_id": "uvo__2ZeGylHqo7M__camera_object_distance_change__01",
  "video_id": "uvo__2ZeGylHqo7M",
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  "question": "From F5 to F7, did object B (person in red shirt and white cap) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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  "qa_id": "uvo__2ZeGylHqo7M__object_pair_distance_change__02",
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  "question": "From F5 to F7, did the 3D distance between object A (person in red shirt and red cap) and object B (person in red shirt and white cap) increase or decrease? Compare their separation at the two specified frames.",
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 {
  "qa_id": "uvo__2ZeGylHqo7M__object_travel_distance_comparison__03",
  "video_id": "uvo__2ZeGylHqo7M",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F5 through F7, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in red shirt and red cap) or B (person in red shirt and white cap)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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 },
 {
  "qa_id": "uvo__2bkfXxPwrLw__camera_view_direction_change__00",
  "video_id": "uvo__2bkfXxPwrLw",
  "task": "camera_view_direction_change",
  "question": "From F1 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F1?",
  "answer": "left",
  "options": [
   "down",
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   "left"
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  "frame_indices": [
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    "image_path": "cases/uvo__2bkfXxPwrLw/rgb_8.jpg"
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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    "normalized_time": 1.0,
    "image_path": "cases/uvo__2eBqLh-rrXU/rgb_8.jpg"
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  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object B (person wearing a green jacket riding the snowmobile) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "video_id": "uvo__2fRD4L_7kOM",
  "task": "camera_view_direction_change",
  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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    "normalized_time": 0.4897959183673469,
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  "video_id": "uvo__2gDXSXMQOwo",
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  "question": "From F2 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
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    "image_path": "cases/uvo__2gDXSXMQOwo/rgb_8.jpg"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "uvo__2kv48vBWTqs__object_world_motion_direction__00",
  "video_id": "uvo__2kv48vBWTqs",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F4, in which dominant direction did object B (woman in black top and patterned skirt) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "down",
  "options": [
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   "up",
   "left",
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  "qa_id": "uvo__2tNj-ludBKQ__camera_translation_direction__00",
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  "qa_id": "uvo__2vJgJiJkxlI__camera_view_direction_change__00",
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  "question": "From F3 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "uvo__30tjJR1Az8o__camera_view_direction_change__00",
  "video_id": "uvo__30tjJR1Az8o",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
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  "question": "After compensating for camera motion from F1 to F8, in which dominant direction did object A (person wearing an orange jacket riding a snowmobile) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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  "question": "From F1 to F8, did object A (person wearing an orange jacket riding a snowmobile) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "After compensating for camera motion from F1 to F8, in which dominant direction did object B (black snowmobile being driven on snow) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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  "question": "From F1 to F8, did object B (black snowmobile being driven on snow) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "video_id": "uvo__3k8PCuYldBs",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "up",
   "forward",
   "backward",
   "right",
   "left",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
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   8
  ],
  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "horse with a rider in a blue shirt",
   "B": "horse in the foreground, viewed from behind"
  },
  "evidence": {
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    -0.40943382239464815,
    0.9827169498044428
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "uvo__3k8PCuYldBs__camera_view_direction_change__01",
  "video_id": "uvo__3k8PCuYldBs",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "up",
  "options": [
   "right",
   "up",
   "down",
   "left"
  ],
  "answer_index": 1,
  "frame_indices": [
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   8
  ],
  "frame_references": [
   {
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "horse with a rider in a blue shirt",
   "B": "horse in the foreground, viewed from behind"
  },
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   "pitch_deg": -15.746922858723638,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__3k8PCuYldBs__object_world_motion_direction__02",
  "video_id": "uvo__3k8PCuYldBs",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F5, in which dominant direction did object A (horse with a rider in a blue shirt) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "left",
   "right",
   "backward",
   "forward",
   "up"
  ],
  "answer_index": 4,
  "frame_indices": [
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   5
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_1.jpg"
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   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_5.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "horse with a rider in a blue shirt",
   "B": "horse in the foreground, viewed from behind"
  },
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__3k8PCuYldBs__object_world_motion_direction__03",
  "video_id": "uvo__3k8PCuYldBs",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F5, in which dominant direction did object B (horse in the foreground, viewed from behind) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "forward",
   "right",
   "backward",
   "up",
   "down",
   "left"
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  "answer_index": 0,
  "frame_indices": [
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   5
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    "frame_index": 1,
    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_1.jpg"
   },
   {
    "frame_index": 5,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__3k8PCuYldBs/rgb_5.jpg"
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  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "horse with a rider in a blue shirt",
   "B": "horse in the foreground, viewed from behind"
  },
  "evidence": {
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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  "group": "HHH",
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 {
  "qa_id": "uvo__3kLCncjQYNg__camera_view_direction_change__00",
  "video_id": "uvo__3kLCncjQYNg",
  "task": "camera_view_direction_change",
  "question": "From F0 to F2, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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   "up",
   "down",
   "left"
  ],
  "answer_index": 3,
  "frame_indices": [
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   2
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__3kLCncjQYNg/rgb_0.jpg"
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    "released_frame_name": "00013.jpg",
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    "image_path": "cases/uvo__3kLCncjQYNg/rgb_2.jpg"
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  "target_mapping": {
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  "target_descriptions": {
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   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
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 {
  "qa_id": "uvo__3mZJgS61jVU__object_world_motion_direction__00",
  "video_id": "uvo__3mZJgS61jVU",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (person in pink jacket on orange sled) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "up",
   "left",
   "right",
   "forward",
   "down",
   "backward"
  ],
  "answer_index": 3,
  "frame_indices": [
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   {
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__3mZJgS61jVU/rgb_0.jpg"
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   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__3mZJgS61jVU/rgb_3.jpg"
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  "object_ids": [
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  "target_mapping": {
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  "target_descriptions": {
   "A": "person in pink jacket on orange sled"
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   "bootstrap_direction_agreement": 1.0,
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "uvo__3mZJgS61jVU__camera_object_distance_change__01",
  "video_id": "uvo__3mZJgS61jVU",
  "task": "camera_object_distance_change",
  "question": "From F0 to F3, did object A (person in pink jacket on orange sled) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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   "closer"
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  "answer_index": 0,
  "frame_indices": [
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    "image_path": "cases/uvo__3mZJgS61jVU/rgb_0.jpg"
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   {
    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/uvo__3mZJgS61jVU/rgb_3.jpg"
   }
  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in pink jacket on orange sled"
  },
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   "delta_depths": 0.4986690685131129,
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   "range_change_bootstrap95": [
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  },
  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLL",
  "manual_review": false
 },
 {
  "qa_id": "uvo__3oERY0un6Yo__object_world_motion_direction__00",
  "video_id": "uvo__3oERY0un6Yo",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (small black dog) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "down",
   "left",
   "backward",
   "right",
   "up",
   "forward"
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  "target_mapping": {
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  },
  "target_descriptions": {
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   "camera_turn_gap_deg": 8.0,
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 {
  "qa_id": "uvo__3oERY0un6Yo__object_world_motion_direction__01",
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  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object B (person in light blue shirt and shorts) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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   "right",
   "down",
   "up",
   "left"
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    "normalized_time": 0.4897959183673469,
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   "camera_turn_gap_deg": 8.0,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "qa_id": "uvo__3xR6gZ22Tdc__camera_view_direction_change__00",
  "video_id": "uvo__3xR6gZ22Tdc",
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  "question": "From F4 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F4?",
  "answer": "right",
  "options": [
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   "left"
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  "qa_id": "uvo__40SoUIggUEw__camera_translation_direction__00",
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (light brown horse with a white mane) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "left"
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 {
  "qa_id": "uvo__40SoUIggUEw__object_world_motion_direction__02",
  "video_id": "uvo__40SoUIggUEw",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object B (dark brown horse ridden by a person in light clothing) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "uvo__40SoUIggUEw__camera_object_distance_change__03",
  "video_id": "uvo__40SoUIggUEw",
  "task": "camera_object_distance_change",
  "question": "From F0 to F3, did object B (dark brown horse ridden by a person in light clothing) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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  "target_mapping": {
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  "target_descriptions": {
   "A": "light brown horse with a white mane",
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 {
  "qa_id": "uvo__40SoUIggUEw__object_pair_distance_change__04",
  "video_id": "uvo__40SoUIggUEw",
  "task": "object_pair_distance_change",
  "question": "From F0 to F3, did the 3D distance between object A (light brown horse with a white mane) and object B (dark brown horse ridden by a person in light clothing) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
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  "qa_id": "uvo__43QnKFB8tW8__object_world_motion_direction__00",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object B (man with white hair wearing a black coat and blue tie) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "uvo__44qN_OJUGLk__camera_view_direction_change__00",
  "video_id": "uvo__44qN_OJUGLk",
  "task": "camera_view_direction_change",
  "question": "From F6 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F6?",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object A (brown horse) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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  "qa_id": "uvo__4ul7FGez_V8__camera_translation_direction__00",
  "video_id": "uvo__4ul7FGez_V8",
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   "right",
   "up",
   "backward"
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  "qa_id": "uvo__54O-omRA7f8__camera_view_direction_change__00",
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  "question": "From F2 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
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  "options": [
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   "up"
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    "image_path": "cases/uvo__54O-omRA7f8/rgb_8.jpg"
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  "video_id": "uvo__54O-omRA7f8",
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  "question": "From F2 to F7, did object A (person in dark swimwear) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "localization_source": "GMOS MOS tracks",
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  "qa_id": "uvo__55rkeqdUVK4__camera_view_direction_change__00",
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  "question": "From F0 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "uvo__5EZwqDdmBNY__camera_view_direction_change__00",
  "video_id": "uvo__5EZwqDdmBNY",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "uvo__5EZwqDdmBNY__object_world_motion_direction__01",
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  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (person with long dark hair wearing a black coat) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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    "image_path": "cases/uvo__5EZwqDdmBNY/rgb_8.jpg"
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  "target_mapping": {
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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 {
  "qa_id": "uvo__5EZwqDdmBNY__object_travel_distance_comparison__02",
  "video_id": "uvo__5EZwqDdmBNY",
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  "qa_id": "uvo__5PjPLbFbH_s__camera_translation_direction__00",
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  "question": "Over the sampled trajectory from F0 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (man in light blue shirt) or B (woman in patterned blouse)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "qa_id": "uvo__GbYJPAXci50__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object B (white car parked on the side of the road) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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 {
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  "question": "From F0 to F3, did the 3D distance between object A (black car partially visible on the left edge) and object B (white car parked on the side of the road) increase or decrease? Compare their separation at the two specified frames.",
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  "qa_id": "uvo__NMKc_U02sxY__camera_translation_direction__00",
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   "up",
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  "qa_id": "uvo__ehKx69TyL5Q__camera_view_direction_change__00",
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  "question": "From F0 to F2, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "qa_id": "uvo__ehKx69TyL5Q__object_world_motion_direction__01",
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  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object B (person hanging from a bungee cord) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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  "question": "From F6 to F8, did the 3D distance between object A (person in orange shirt on the platform) and object B (person hanging from a bungee cord) increase or decrease? Compare their separation at the two specified frames.",
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 },
 {
  "qa_id": "uvo__ehKx69TyL5Q__object_travel_distance_comparison__03",
  "video_id": "uvo__ehKx69TyL5Q",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F6 through F8, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in orange shirt on the platform) or B (person hanging from a bungee cord)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
  "answer": "B",
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  "frame_indices": [
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  "question": "From F0 to F2, did object A (person water skiing) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object B (white water ski) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "question": "From F0 to F2, did object B (white water ski) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "uvo__p7N2efIPu10__camera_translation_direction__00",
  "video_id": "uvo__p7N2efIPu10",
  "task": "camera_translation_direction",
  "question": "From F6 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
   "right",
   "backward",
   "forward",
   "up",
   "down"
  ],
  "answer_index": 3,
  "frame_indices": [
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   8
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    "released_frame_index": 37,
    "released_frame_name": "00038.jpg",
    "normalized_time": 0.7551020408163265,
    "image_path": "cases/uvo__p7N2efIPu10/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__p7N2efIPu10/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g2"
  },
  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "tracked object [g2]"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 },
 {
  "qa_id": "uvo__xrygOElnq5I__camera_view_direction_change__00",
  "video_id": "uvo__xrygOElnq5I",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
   "up",
   "down",
   "left",
   "right"
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  "answer_index": 3,
  "frame_indices": [
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   8
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   {
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/uvo__xrygOElnq5I/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/uvo__xrygOElnq5I/rgb_8.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in white shirt and orange cap"
  },
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   "pitch_deg": -2.6377441811951767,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "group": "LHL",
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 },
 {
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  "video_id": "uvo__xrygOElnq5I",
  "task": "camera_object_distance_change",
  "question": "From F0 to F5, did object A (person in white shirt and orange cap) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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  "frame_indices": [
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   {
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    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/uvo__xrygOElnq5I/rgb_5.jpg"
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  "target_mapping": {
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  "target_descriptions": {
   "A": "person in white shirt and orange cap"
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   "relative_change": 1.0402141206995752,
   "range_change_bootstrap95": [
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 },
 {
  "qa_id": "youtube_vis__019cf5e661__object_world_motion_direction__00",
  "video_id": "youtube_vis__019cf5e661",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (large adult polar bear walking on the rock ledge) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "backward",
   "forward",
   "down",
   "up"
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  "frame_indices": [
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    "released_frame_name": "00013.jpg",
    "normalized_time": 0.24489795918367346,
    "image_path": "cases/youtube_vis__019cf5e661/rgb_2.jpg"
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    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.6326530612244898,
    "image_path": "cases/youtube_vis__019cf5e661/rgb_5.jpg"
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  "target_mapping": {
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__03fe889119__camera_translation_direction__00",
  "video_id": "youtube_vis__03fe889119",
  "task": "camera_translation_direction",
  "question": "From F2 to F4, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "right",
   "down",
   "left",
   "up",
   "backward"
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  "frame_indices": [
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    "normalized_time": 0.24390243902439024,
    "image_path": "cases/youtube_vis__03fe889119/rgb_2.jpg"
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   {
    "frame_index": 4,
    "released_frame_index": 20,
    "released_frame_name": "00021.jpg",
    "normalized_time": 0.4878048780487805,
    "image_path": "cases/youtube_vis__03fe889119/rgb_4.jpg"
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  "target_mapping": {
   "A": "g2"
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  "target_descriptions": {
   "A": "red sedan"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
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   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__03fe889119__object_world_motion_direction__01",
  "video_id": "youtube_vis__03fe889119",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (red sedan) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "left",
   "backward",
   "right",
   "forward",
   "up",
   "down"
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  "frame_indices": [
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    "released_frame_name": "00011.jpg",
    "normalized_time": 0.24390243902439024,
    "image_path": "cases/youtube_vis__03fe889119/rgb_2.jpg"
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   {
    "frame_index": 4,
    "released_frame_index": 20,
    "released_frame_name": "00021.jpg",
    "normalized_time": 0.4878048780487805,
    "image_path": "cases/youtube_vis__03fe889119/rgb_4.jpg"
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  "object_ids": [
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  "target_mapping": {
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__04d62d9d98__object_world_motion_direction__00",
  "video_id": "youtube_vis__04d62d9d98",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F3, in which dominant direction did object A (person in white t-shirt and black pants skateboarding) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "right",
   "up",
   "down",
   "left",
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  "frame_indices": [
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    "released_frame_index": 7,
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    "normalized_time": 0.3684210526315789,
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  "target_mapping": {
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 {
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  "question": "From F5 to F7, did object A (person in black shirt and red shorts) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
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  "video_id": "youtube_vis__088c295569",
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  "question": "From F5 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F5?",
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 },
 {
  "qa_id": "youtube_vis__0b5b5e8e5a__camera_translation_direction__00",
  "video_id": "youtube_vis__0b5b5e8e5a",
  "task": "camera_translation_direction",
  "question": "From F3 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "backward",
   "right",
   "forward",
   "left",
   "down",
   "up"
  ],
  "answer_index": 2,
  "frame_indices": [
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   8
  ],
  "frame_references": [
   {
    "frame_index": 3,
    "released_frame_index": 7,
    "released_frame_name": "00008.jpg",
    "normalized_time": 0.3684210526315789,
    "image_path": "cases/youtube_vis__0b5b5e8e5a/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 19,
    "released_frame_name": "00020.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__0b5b5e8e5a/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "person standing on the road",
   "B": "car interior visible through the windshield"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.15523961845050865,
    2.3691603899358404
   ],
   "formula": "(C_end-C_start) @ R_start.T / background_depth"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__0b5b5e8e5a__object_world_motion_direction__01",
  "video_id": "youtube_vis__0b5b5e8e5a",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (person standing on the road) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "forward",
   "down",
   "left",
   "backward",
   "up",
   "right"
  ],
  "answer_index": 0,
  "frame_indices": [
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   8
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  "frame_references": [
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    "released_frame_index": 14,
    "released_frame_name": "00015.jpg",
    "normalized_time": 0.7368421052631579,
    "image_path": "cases/youtube_vis__0b5b5e8e5a/rgb_6.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 19,
    "released_frame_name": "00020.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__0b5b5e8e5a/rgb_8.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "person standing on the road",
   "B": "car interior visible through the windshield"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.01380635285741616,
    0.9366533566583463
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   "dominant_component_bootstrap95": [
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    0.9432736268769503
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__0b7dbfa3cb__object_world_motion_direction__00",
  "video_id": "youtube_vis__0b7dbfa3cb",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (brown cow with white markings on the lower legs) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "right",
   "forward",
   "down",
   "left",
   "backward",
   "up"
  ],
  "answer_index": 3,
  "frame_indices": [
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   8
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  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/youtube_vis__0b7dbfa3cb/rgb_0.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__0b7dbfa3cb/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "brown cow with white markings on the lower legs"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.005838863107701274
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   "dominant_component_bootstrap95": [
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    -0.1550940468247969
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__0f17fa6fcb__object_world_motion_direction__00",
  "video_id": "youtube_vis__0f17fa6fcb",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F7, in which dominant direction did object B (mallard duck with green head and grey body) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "up",
   "down",
   "right",
   "left",
   "backward",
   "forward"
  ],
  "answer_index": 3,
  "frame_indices": [
   4,
   7
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  "frame_references": [
   {
    "frame_index": 4,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.5142857142857142,
    "image_path": "cases/youtube_vis__0f17fa6fcb/rgb_4.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.8857142857142857,
    "image_path": "cases/youtube_vis__0f17fa6fcb/rgb_7.jpg"
   }
  ],
  "object_ids": [
   "g3"
  ],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "mallard duck with orange head and white neck ring",
   "B": "mallard duck with green head and grey body"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.01420063904446442,
    0.057400729878589477
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   "dominant_component_bootstrap95": [
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    -0.1475525377865307
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   "bootstrap_direction_agreement": 0.984375,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__0f17fa6fcb__object_pair_distance_change__01",
  "video_id": "youtube_vis__0f17fa6fcb",
  "task": "object_pair_distance_change",
  "question": "From F4 to F7, did the 3D distance between object A (mallard duck with orange head and white neck ring) and object B (mallard duck with green head and grey body) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
  "options": [
   "decreased",
   "increased"
  ],
  "answer_index": 1,
  "frame_indices": [
   4,
   7
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  "frame_references": [
   {
    "frame_index": 4,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.5142857142857142,
    "image_path": "cases/youtube_vis__0f17fa6fcb/rgb_4.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 31,
    "released_frame_name": "00032.jpg",
    "normalized_time": 0.8857142857142857,
    "image_path": "cases/youtube_vis__0f17fa6fcb/rgb_7.jpg"
   }
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  "object_ids": [
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   "g3"
  ],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "mallard duck with orange head and white neck ring",
   "B": "mallard duck with green head and grey body"
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   "metrics": {
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     0.6602487564086914,
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    "distance_change_depths": 0.1289207935333252,
    "relative_distance_change": 0.2325689570357547,
    "travel_a_depths": 0.08532614260911942,
    "travel_b_depths": 0.17517367005348206,
    "travel_gap_depths": 0.08984752744436264,
    "travel_ratio": 2.0529894437623386,
    "distance_change_bootstrap95": [
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     0.13735347837209702
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    "travel_a_minus_b_bootstrap95": [
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     -0.07975719422101975
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   },
   "record_key": "youtube_vis__0f17fa6fcb__g2_g3__F4-F7",
   "anchors_a": [
    [
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     -0.13567371666431427,
     1.4061790704727173
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    [
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     -0.15155816078186035,
     1.4471228122711182
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    [
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    [
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     -0.15530818700790405,
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   "anchors_b": [
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    [
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    [
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     0.9724804162979126
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    [
     -0.42130047082901,
     0.03848320618271828,
     1.0054771900177002
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   ],
   "track_counts": [
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   ],
   "initial_track_counts": [
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   ],
   "track_survival": [
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   ],
   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__1121b42b2e__object_world_motion_direction__00",
  "video_id": "youtube_vis__1121b42b2e",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F5, in which dominant direction did object A (person in blue shirt and black pants) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "down",
   "right",
   "forward",
   "up",
   "backward",
   "left"
  ],
  "answer_index": 4,
  "frame_indices": [
   0,
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  "frame_references": [
   {
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    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/youtube_vis__1121b42b2e/rgb_0.jpg"
   },
   {
    "frame_index": 5,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.631578947368421,
    "image_path": "cases/youtube_vis__1121b42b2e/rgb_5.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "person in blue shirt and black pants"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__1121b42b2e__camera_object_distance_change__01",
  "video_id": "youtube_vis__1121b42b2e",
  "task": "camera_object_distance_change",
  "question": "From F0 to F5, did object A (person in blue shirt and black pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
   "closer",
   "farther"
  ],
  "answer_index": 0,
  "frame_indices": [
   0,
   5
  ],
  "frame_references": [
   {
    "frame_index": 0,
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/youtube_vis__1121b42b2e/rgb_0.jpg"
   },
   {
    "frame_index": 5,
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 {
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  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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 {
  "qa_id": "youtube_vis__145975e717__object_world_motion_direction__00",
  "video_id": "youtube_vis__145975e717",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object B (person in dark shorts) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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   "left",
   "up",
   "down"
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    "normalized_time": 0.125,
    "image_path": "cases/youtube_vis__145975e717/rgb_1.jpg"
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    "released_frame_index": 9,
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    "normalized_time": 0.375,
    "image_path": "cases/youtube_vis__145975e717/rgb_3.jpg"
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  "qa_id": "youtube_vis__16af445362__camera_view_direction_change__00",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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  "question": "From F0 to F6, did object A (dark grey military jet with a white 'A' on the tail fin) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "qa_id": "youtube_vis__18d7382a94__camera_translation_direction__00",
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 {
  "qa_id": "youtube_vis__19ee80dac6__object_world_motion_direction__00",
  "video_id": "youtube_vis__19ee80dac6",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F2, in which dominant direction did object B (person in black wetsuit paddling on a surfboard) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "backward",
   "up",
   "left",
   "down",
   "right",
   "forward"
  ],
  "answer_index": 5,
  "frame_indices": [
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   2
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/youtube_vis__19ee80dac6/rgb_0.jpg"
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   {
    "frame_index": 2,
    "released_frame_index": 9,
    "released_frame_name": "00010.jpg",
    "normalized_time": 0.2571428571428571,
    "image_path": "cases/youtube_vis__19ee80dac6/rgb_2.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "person in black wetsuit paddling on a surfboard"
  },
  "evidence": {
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 0.984375,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__1f7b3de3bc__camera_view_direction_change__00",
  "video_id": "youtube_vis__1f7b3de3bc",
  "task": "camera_view_direction_change",
  "question": "From F2 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
  "answer": "left",
  "options": [
   "right",
   "down",
   "up",
   "left"
  ],
  "answer_index": 3,
  "frame_indices": [
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   4
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    "released_frame_index": 10,
    "released_frame_name": "00011.jpg",
    "normalized_time": 0.24390243902439024,
    "image_path": "cases/youtube_vis__1f7b3de3bc/rgb_2.jpg"
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   {
    "frame_index": 4,
    "released_frame_index": 20,
    "released_frame_name": "00021.jpg",
    "normalized_time": 0.4878048780487805,
    "image_path": "cases/youtube_vis__1f7b3de3bc/rgb_4.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
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  },
  "target_descriptions": {
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   "pitch_deg": 0.8830705706214954,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__1f7b3de3bc__object_world_motion_direction__01",
  "video_id": "youtube_vis__1f7b3de3bc",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F4, in which dominant direction did object A (black race car with white and orange flame decals) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
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   "up",
   "forward",
   "left",
   "down",
   "backward"
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  "answer_index": 3,
  "frame_indices": [
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   4
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    "released_frame_index": 10,
    "released_frame_name": "00011.jpg",
    "normalized_time": 0.24390243902439024,
    "image_path": "cases/youtube_vis__1f7b3de3bc/rgb_2.jpg"
   },
   {
    "frame_index": 4,
    "released_frame_index": 20,
    "released_frame_name": "00021.jpg",
    "normalized_time": 0.4878048780487805,
    "image_path": "cases/youtube_vis__1f7b3de3bc/rgb_4.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "black race car with white and orange flame decals"
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 0.9765625,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHH",
  "manual_review": false
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 {
  "qa_id": "youtube_vis__20a3d90790__object_world_motion_direction__00",
  "video_id": "youtube_vis__20a3d90790",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (runner in maroon shirt and orange shorts) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "backward",
   "left",
   "up",
   "forward",
   "right",
   "down"
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  "answer_index": 3,
  "frame_indices": [
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   5
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    "frame_index": 3,
    "released_frame_index": 14,
    "released_frame_name": "00015.jpg",
    "normalized_time": 0.3684210526315789,
    "image_path": "cases/youtube_vis__20a3d90790/rgb_3.jpg"
   },
   {
    "frame_index": 5,
    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.631578947368421,
    "image_path": "cases/youtube_vis__20a3d90790/rgb_5.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "runner in maroon shirt and orange shorts",
   "B": "runner in yellow shirt and black shorts"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__20a3d90790__object_world_motion_direction__01",
  "video_id": "youtube_vis__20a3d90790",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object B (runner in yellow shirt and black shorts) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
   "up",
   "forward",
   "backward",
   "down",
   "right"
  ],
  "answer_index": 2,
  "frame_indices": [
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    "released_frame_name": "00015.jpg",
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    "image_path": "cases/youtube_vis__20a3d90790/rgb_3.jpg"
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   {
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    "released_frame_index": 24,
    "released_frame_name": "00025.jpg",
    "normalized_time": 0.631578947368421,
    "image_path": "cases/youtube_vis__20a3d90790/rgb_5.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "runner in maroon shirt and orange shorts",
   "B": "runner in yellow shirt and black shorts"
  },
  "evidence": {
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
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   "sam_score": 0.8,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__25d2163904__camera_object_distance_change__00",
  "video_id": "youtube_vis__25d2163904",
  "task": "camera_object_distance_change",
  "question": "From F4 to F6, did object A (white race car with Prince Alibante livery) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
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  "answer_index": 0,
  "frame_indices": [
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   {
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    "released_frame_index": 29,
    "released_frame_name": "00030.jpg",
    "normalized_time": 0.7435897435897436,
    "image_path": "cases/youtube_vis__25d2163904/rgb_6.jpg"
   }
  ],
  "object_ids": [
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  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "white race car with Prince Alibante livery",
   "B": "man in black t-shirt and green cap"
  },
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   "delta_depths": 0.3798081859139979,
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  },
  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "youtube_vis__25d2163904__object_pair_distance_change__01",
  "video_id": "youtube_vis__25d2163904",
  "task": "object_pair_distance_change",
  "question": "From F4 to F6, did the 3D distance between object A (white race car with Prince Alibante livery) and object B (man in black t-shirt and green cap) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
  "options": [
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  "answer_index": 0,
  "frame_indices": [
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    "released_frame_index": 29,
    "released_frame_name": "00030.jpg",
    "normalized_time": 0.7435897435897436,
    "image_path": "cases/youtube_vis__25d2163904/rgb_6.jpg"
   }
  ],
  "object_ids": [
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  "target_mapping": {
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   "A": "white race car with Prince Alibante livery",
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   "metrics": {
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    "distance_change_depths": 0.47700759768486023,
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    "travel_a_minus_b_bootstrap95": [
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   },
   "record_key": "youtube_vis__25d2163904__g1_g3__F4-F6",
   "anchors_a": [
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    [
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    [
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    [
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  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (white and orange commuter train with bright headlights) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "relative_change": 0.3807224405574914,
   "range_change_bootstrap95": [
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__3c713cbf2f__object_world_motion_direction__00",
  "video_id": "youtube_vis__3c713cbf2f",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F4, in which dominant direction did object A (white car drifting on a dirt track) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "options": [
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   "backward",
   "forward",
   "right",
   "left",
   "down"
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  "frame_indices": [
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    "released_frame_index": 9,
    "released_frame_name": "00010.jpg",
    "normalized_time": 0.5,
    "image_path": "cases/youtube_vis__3c713cbf2f/rgb_4.jpg"
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  "object_ids": [
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  "target_mapping": {
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   "B": "g2"
  },
  "target_descriptions": {
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   "B": "tracked object [g2]"
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 },
 {
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  "video_id": "youtube_vis__3c713cbf2f",
  "task": "camera_object_distance_change",
  "question": "From F0 to F4, did object A (white car drifting on a dirt track) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
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  "frame_indices": [
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   4
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    "released_frame_index": 9,
    "released_frame_name": "00010.jpg",
    "normalized_time": 0.5,
    "image_path": "cases/youtube_vis__3c713cbf2f/rgb_4.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1",
   "B": "g2"
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  "target_descriptions": {
   "A": "white car drifting on a dirt track",
   "B": "tracked object [g2]"
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   "range_change_bootstrap95": [
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "youtube_vis__3e2845307e__camera_translation_direction__00",
  "video_id": "youtube_vis__3e2845307e",
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  "question": "From F0 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "options": [
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   "backward",
   "right",
   "down",
   "up"
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  "frame_indices": [
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
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    "frame_index": 6,
    "released_frame_index": 9,
    "released_frame_name": "00010.jpg",
    "normalized_time": 0.75,
    "image_path": "cases/youtube_vis__3e2845307e/rgb_6.jpg"
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "large sea turtle swimming near the seabed"
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
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  "video_id": "youtube_vis__3e2845307e",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (large sea turtle swimming near the seabed) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "right",
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   "down"
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  "frame_indices": [
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/youtube_vis__3e2845307e/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__3e2845307e/rgb_8.jpg"
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  "target_mapping": {
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__40514eea6c__camera_view_direction_change__00",
  "video_id": "youtube_vis__40514eea6c",
  "task": "camera_view_direction_change",
  "question": "From F0 to F3, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
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  "answer_index": 3,
  "frame_indices": [
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   {
    "frame_index": 3,
    "released_frame_index": 11,
    "released_frame_name": "00012.jpg",
    "normalized_time": 0.3793103448275862,
    "image_path": "cases/youtube_vis__40514eea6c/rgb_3.jpg"
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   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__405874973b__object_world_motion_direction__00",
  "video_id": "youtube_vis__405874973b",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (large warthog with visible tusks and a greyish-brown coat) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "options": [
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   "backward",
   "up",
   "forward"
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  "answer_index": 2,
  "frame_indices": [
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   {
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__405874973b/rgb_8.jpg"
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  "object_ids": [
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  "thresholds": {
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__41a34c20e7__object_world_motion_direction__00",
  "video_id": "youtube_vis__41a34c20e7",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F4, in which dominant direction did object A (person in blue shirt and dark pants) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "right",
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  "answer_index": 1,
  "frame_indices": [
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/youtube_vis__41a34c20e7/rgb_0.jpg"
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   {
    "frame_index": 4,
    "released_frame_index": 10,
    "released_frame_name": "00011.jpg",
    "normalized_time": 0.5263157894736842,
    "image_path": "cases/youtube_vis__41a34c20e7/rgb_4.jpg"
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  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g2"
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  "target_descriptions": {
   "A": "person in blue shirt and dark pants"
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  "evidence": {
   "displacement_start_camera_depths": [
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  "thresholds": {
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 {
  "qa_id": "youtube_vis__429c3d0c93__camera_view_direction_change__00",
  "video_id": "youtube_vis__429c3d0c93",
  "task": "camera_view_direction_change",
  "question": "From F5 to F7, toward which direction did the camera optical axis turn, using the camera axes frozen at F5?",
  "answer": "left",
  "options": [
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   "up"
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  "frame_indices": [
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    "image_path": "cases/youtube_vis__429c3d0c93/rgb_5.jpg"
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   {
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    "released_frame_index": 43,
    "released_frame_name": "00044.jpg",
    "normalized_time": 0.8775510204081632,
    "image_path": "cases/youtube_vis__429c3d0c93/rgb_7.jpg"
   }
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  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
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   "direction_dominance": 2.0,
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   "bootstrap_gap": 0.05,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
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  "video_id": "youtube_vis__429c3d0c93",
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  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object A (cyclist in black jersey and white helmet) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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 {
  "qa_id": "youtube_vis__43d63b752a__object_world_motion_direction__00",
  "video_id": "youtube_vis__43d63b752a",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (snowboarder in black jacket and green pants) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__43d63b752a/rgb_8.jpg"
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   "camera_turn_gap_deg": 8.0,
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   "min_intervals": 2,
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   "seed_count": 256,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__483c72fb4d__object_world_motion_direction__00",
  "video_id": "youtube_vis__483c72fb4d",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F5, in which dominant direction did object A (person in white shirt and white shorts) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "backward",
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   "up",
   "down",
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  "frame_indices": [
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    "released_frame_name": "00017.jpg",
    "normalized_time": 0.36363636363636365,
    "image_path": "cases/youtube_vis__483c72fb4d/rgb_3.jpg"
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    "frame_index": 5,
    "released_frame_index": 28,
    "released_frame_name": "00029.jpg",
    "normalized_time": 0.6363636363636364,
    "image_path": "cases/youtube_vis__483c72fb4d/rgb_5.jpg"
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   "A": "g2",
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   "camera_object_range_abs": 0.1,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__483c72fb4d__object_pair_distance_change__01",
  "video_id": "youtube_vis__483c72fb4d",
  "task": "object_pair_distance_change",
  "question": "From F3 to F5, did the 3D distance between object A (person in white shirt and white shorts) and object B (person in grey shirt and white shorts) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "increased",
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  "answer_index": 1,
  "frame_indices": [
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    "normalized_time": 0.36363636363636365,
    "image_path": "cases/youtube_vis__483c72fb4d/rgb_3.jpg"
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    "released_frame_index": 28,
    "released_frame_name": "00029.jpg",
    "normalized_time": 0.6363636363636364,
    "image_path": "cases/youtube_vis__483c72fb4d/rgb_5.jpg"
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  "object_ids": [
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  "target_mapping": {
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    "travel_ratio": 2.0560199206055763,
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    "travel_a_minus_b_bootstrap95": [
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   "record_key": "youtube_vis__483c72fb4d__g2_g3__F3-F5",
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   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "direction_dominance": 2.0,
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   "camera_turn_deg": 15.0,
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "youtube_vis__483c72fb4d__object_travel_distance_comparison__02",
  "video_id": "youtube_vis__483c72fb4d",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F3 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (person in white shirt and white shorts) or B (person in grey shirt and white shorts)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "A"
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  "answer_index": 1,
  "frame_indices": [
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    "image_path": "cases/youtube_vis__483c72fb4d/rgb_3.jpg"
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   {
    "frame_index": 4,
    "released_frame_index": 22,
    "released_frame_name": "00023.jpg",
    "normalized_time": 0.5,
    "image_path": "cases/youtube_vis__483c72fb4d/rgb_4.jpg"
   },
   {
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    "released_frame_index": 28,
    "released_frame_name": "00029.jpg",
    "normalized_time": 0.6363636363636364,
    "image_path": "cases/youtube_vis__483c72fb4d/rgb_5.jpg"
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  "object_ids": [
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  "target_mapping": {
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    "travel_a_minus_b_bootstrap95": [
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   },
   "record_key": "youtube_vis__483c72fb4d__g2_g3__F3-F5",
   "anchors_a": [
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   "track_counts": [
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    162
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   "initial_track_counts": [
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    256
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__4e3a9486f2__camera_translation_direction__00",
  "video_id": "youtube_vis__4e3a9486f2",
  "task": "camera_translation_direction",
  "question": "From F1 to F3, in which dominant direction did the camera center move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "backward",
   "right",
   "up",
   "forward",
   "left"
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  "answer_index": 4,
  "frame_indices": [
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   3
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    "released_frame_index": 5,
    "released_frame_name": "00006.jpg",
    "normalized_time": 0.12195121951219512,
    "image_path": "cases/youtube_vis__4e3a9486f2/rgb_1.jpg"
   },
   {
    "frame_index": 3,
    "released_frame_index": 15,
    "released_frame_name": "00016.jpg",
    "normalized_time": 0.36585365853658536,
    "image_path": "cases/youtube_vis__4e3a9486f2/rgb_3.jpg"
   }
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  "target_descriptions": {},
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_relative": 0.2,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HHL",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__4eb6fc23a2__camera_translation_direction__00",
  "video_id": "youtube_vis__4eb6fc23a2",
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  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "right",
   "up",
   "forward",
   "left",
   "backward"
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  "frame_indices": [
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    "released_frame_name": "00010.jpg",
    "normalized_time": 0.2571428571428571,
    "image_path": "cases/youtube_vis__4eb6fc23a2/rgb_2.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__4eb6fc23a2/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_forward_coverage": 0.25,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 },
 {
  "qa_id": "youtube_vis__4fdfef4dea__camera_view_direction_change__00",
  "video_id": "youtube_vis__4fdfef4dea",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "right",
  "options": [
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   "right"
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  "frame_indices": [
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    "released_frame_name": "00001.jpg",
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    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_0.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_8.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "cyclist in white and blue jersey with orange helmet",
   "B": "cyclist in black and white jersey with green helmet"
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   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "min_intervals": 2,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__4fdfef4dea__object_world_motion_direction__01",
  "video_id": "youtube_vis__4fdfef4dea",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object A (cyclist in white and blue jersey with orange helmet) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
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   "down",
   "backward",
   "left",
   "right",
   "up"
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  "answer_index": 4,
  "frame_indices": [
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   8
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    "released_frame_name": "00012.jpg",
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    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_5.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_8.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "cyclist in white and blue jersey with orange helmet",
   "B": "cyclist in black and white jersey with green helmet"
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  "evidence": {
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHH",
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 {
  "qa_id": "youtube_vis__4fdfef4dea__object_world_motion_direction__02",
  "video_id": "youtube_vis__4fdfef4dea",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F5 to F8, in which dominant direction did object B (cyclist in black and white jersey with green helmet) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "backward",
   "up",
   "right",
   "left",
   "forward",
   "down"
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  "answer_index": 2,
  "frame_indices": [
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    "frame_index": 5,
    "released_frame_index": 11,
    "released_frame_name": "00012.jpg",
    "normalized_time": 0.6111111111111112,
    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_5.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_8.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g2",
   "B": "g3"
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  "target_descriptions": {
   "A": "cyclist in white and blue jersey with orange helmet",
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__4fdfef4dea__object_pair_distance_change__03",
  "video_id": "youtube_vis__4fdfef4dea",
  "task": "object_pair_distance_change",
  "question": "From F5 to F8, did the 3D distance between object A (cyclist in white and blue jersey with orange helmet) and object B (cyclist in black and white jersey with green helmet) increase or decrease? Compare their separation at the two specified frames.",
  "answer": "decreased",
  "options": [
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  "answer_index": 1,
  "frame_indices": [
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    "normalized_time": 0.6111111111111112,
    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_5.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__4fdfef4dea/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
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   "A": "cyclist in white and blue jersey with orange helmet",
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    "travel_ratio": 1.5148543613834284,
    "distance_change_bootstrap95": [
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    "travel_a_minus_b_bootstrap95": [
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   "record_key": "youtube_vis__4fdfef4dea__g2_g3__F5-F8",
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   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
   "tracking": "RAFT-large 33 context frames",
   "position_definition": "arithmetic mean of the same persistent surface-core points"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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  "qa_id": "youtube_vis__588f925ab6__object_world_motion_direction__00",
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 {
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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  "qa_id": "youtube_vis__5892409fbd__camera_translation_direction__00",
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    "image_path": "cases/youtube_vis__5a50640995/rgb_8.jpg"
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    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__5a50640995/rgb_8.jpg"
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    "image_path": "cases/youtube_vis__5ce3e74cbc/rgb_8.jpg"
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  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (female athlete in red tank top and shorts running) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 18,
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    "normalized_time": 0.75,
    "image_path": "cases/youtube_vis__5ce3e74cbc/rgb_6.jpg"
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__5e8afccb05__camera_object_distance_change__00",
  "video_id": "youtube_vis__5e8afccb05",
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  "question": "From F5 to F8, did object A (orange van) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "frame_indices": [
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   {
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    "image_path": "cases/youtube_vis__5e8afccb05/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
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   "min_intervals": 2,
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  "video_id": "youtube_vis__6797f20aa9",
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  "question": "After compensating for camera motion from F2 to F6, in which dominant direction did object A (person in white shirt and blue jeans riding a green bike) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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  "video_id": "youtube_vis__6797f20aa9",
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  "question": "From F2 to F6, did object A (person in white shirt and blue jeans riding a green bike) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "After compensating for camera motion from F2 to F6, in which dominant direction did object B (person in black shirt and green shorts riding a green bike) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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 {
  "qa_id": "youtube_vis__6797f20aa9__camera_object_distance_change__04",
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  "question": "From F2 to F6, did object B (person in black shirt and green shorts riding a green bike) become closer to or farther from the camera? Compare 3D Euclidean range.",
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 {
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  "video_id": "youtube_vis__6aea2205ec",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F0 through F2, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (snowboarder wearing a grey jacket and black pants) or B (light green snowboard)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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 {
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  "video_id": "youtube_vis__6af7af671f",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F4, in which dominant direction did object A (person in orange shirt) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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  "question": "From F1 to F4, did object A (person in orange shirt) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "question": "After compensating for camera motion from F5 to F7, in which dominant direction did object A (person in grey shirt and dark pants skateboarding) move? Use the camera axes frozen at F5: right/down/forward are +x/+y/+z.",
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  "question": "From F5 to F7, did object A (person in grey shirt and dark pants skateboarding) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 {
  "qa_id": "youtube_vis__6cc791250b__camera_translation_direction__00",
  "video_id": "youtube_vis__6cc791250b",
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  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "youtube_vis__74d05e4305__object_world_motion_direction__00",
  "video_id": "youtube_vis__74d05e4305",
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  "qa_id": "youtube_vis__7a17878a33__object_world_motion_direction__00",
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 {
  "qa_id": "youtube_vis__7b17cc8dc9__camera_view_direction_change__00",
  "video_id": "youtube_vis__7b17cc8dc9",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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 {
  "qa_id": "youtube_vis__997117a654__object_world_motion_direction__00",
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   "range_change_bootstrap95": [
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_ratio": 1.5,
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   "min_intervals": 2,
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   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 {
  "qa_id": "youtube_vis__a0ad437be4__camera_translation_direction__00",
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   "backward",
   "forward",
   "right",
   "up"
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    "normalized_time": 1.0,
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 {
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   "bootstrap_direction_agreement": 0.95
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  "split": "development",
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 {
  "qa_id": "youtube_vis__a2c996e429__camera_translation_direction__00",
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  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object A (white bus with a large advertisement featuring a smiling woman on the rear) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
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  "question": "After compensating for camera motion from F3 to F6, in which dominant direction did object B (silver sedan driving on the right side of the road) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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 {
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 {
  "qa_id": "youtube_vis__a2c996e429__object_pair_distance_change__04",
  "video_id": "youtube_vis__a2c996e429",
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  "question": "From F3 to F6, did the 3D distance between object A (white bus with a large advertisement featuring a smiling woman on the rear) and object B (silver sedan driving on the right side of the road) increase or decrease? Compare their separation at the two specified frames.",
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 {
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  "question": "After compensating for camera motion from F0 to F8, in which dominant direction did object A (China Airlines passenger jet) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "qa_id": "youtube_vis__a56d08782d__camera_translation_direction__00",
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  "qa_id": "youtube_vis__a9d6aa2506__object_world_motion_direction__00",
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 {
  "qa_id": "youtube_vis__a9d6aa2506__object_travel_distance_comparison__01",
  "video_id": "youtube_vis__a9d6aa2506",
  "task": "object_travel_distance_comparison",
  "question": "Over the sampled trajectory from F5 through F7, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (red muscle car) or B (person in dark t-shirt and jeans)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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  "options": [
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   "A"
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  "target_mapping": {
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    "relative_distance_change": 0.10941095821623015,
    "travel_a_depths": 0.30709749460220337,
    "travel_b_depths": 0.15976855158805847,
    "travel_gap_depths": 0.1473289430141449,
    "travel_ratio": 1.9221398175656783,
    "distance_change_bootstrap95": [
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   "record_key": "youtube_vis__a9d6aa2506__g1_g3__F5-F7",
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   "anchors_b": [
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   "track_counts": [
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   "initial_track_counts": [
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   "track_survival": [
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   "mask_overlap": 0.0,
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   "position_definition": "arithmetic mean of the same persistent surface-core points"
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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  "geometry_thresholds_unchanged": true,
  "group": "LHH",
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 {
  "qa_id": "youtube_vis__abb50c8697__object_world_motion_direction__00",
  "video_id": "youtube_vis__abb50c8697",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object B (mallard duck with green head and white neck ring) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "left",
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   "forward",
   "up",
   "down",
   "left"
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  "frame_indices": [
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    "released_frame_index": 11,
    "released_frame_name": "00012.jpg",
    "normalized_time": 0.6111111111111112,
    "image_path": "cases/youtube_vis__abb50c8697/rgb_5.jpg"
   }
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  "target_mapping": {
   "A": "g1",
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_track_survival": 0.15,
   "sam_score": 0.8,
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   "min_forward_coverage": 0.25,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__abe61a11bb__camera_translation_direction__00",
  "video_id": "youtube_vis__abe61a11bb",
  "task": "camera_translation_direction",
  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
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   "right",
   "backward",
   "up",
   "down"
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  "frame_indices": [
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    "image_path": "cases/youtube_vis__abe61a11bb/rgb_2.jpg"
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   {
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    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__abe61a11bb/rgb_8.jpg"
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "min_forward_coverage": 0.25,
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
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  "group": "HHL",
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 },
 {
  "qa_id": "youtube_vis__abe61a11bb__camera_view_direction_change__01",
  "video_id": "youtube_vis__abe61a11bb",
  "task": "camera_view_direction_change",
  "question": "From F2 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
  "answer": "right",
  "options": [
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   "up"
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  "frame_indices": [
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   {
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    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__abe61a11bb/rgb_8.jpg"
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   "min_intervals": 2,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "localization_source": "GMOS MOS tracks",
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  "group": "HHL",
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 {
  "qa_id": "youtube_vis__acf2c4b745__camera_view_direction_change__00",
  "video_id": "youtube_vis__acf2c4b745",
  "task": "camera_view_direction_change",
  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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  "frame_indices": [
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   {
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    "released_frame_name": "00011.jpg",
    "normalized_time": 0.5263157894736842,
    "image_path": "cases/youtube_vis__acf2c4b745/rgb_4.jpg"
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  "target_mapping": {
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   "direction_dominance": 2.0,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 {
  "qa_id": "youtube_vis__acf2c4b745__camera_object_distance_change__01",
  "video_id": "youtube_vis__acf2c4b745",
  "task": "camera_object_distance_change",
  "question": "From F2 to F4, did object A (person in white shirt and orange shorts riding a skateboard) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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    "released_frame_index": 10,
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    "normalized_time": 0.5263157894736842,
    "image_path": "cases/youtube_vis__acf2c4b745/rgb_4.jpg"
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   "A": "person in white shirt and orange shorts riding a skateboard"
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
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 },
 {
  "qa_id": "youtube_vis__b53f675641__camera_translation_direction__00",
  "video_id": "youtube_vis__b53f675641",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "forward",
   "left",
   "down",
   "right",
   "up"
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  "answer_index": 1,
  "frame_indices": [
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   {
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    "released_frame_name": "00030.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__b53f675641/rgb_8.jpg"
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  ],
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in a white shirt and dark vest parachuting"
  },
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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    "frame_index": 8,
    "released_frame_index": 41,
    "released_frame_name": "00042.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__b58df6732c/rgb_8.jpg"
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   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLL",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__c51821b990__object_world_motion_direction__00",
  "video_id": "youtube_vis__c51821b990",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object A (person in olive green shirt and dark shorts holding a pink object) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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  "options": [
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   "left",
   "right",
   "up",
   "backward",
   "down"
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  "answer_index": 4,
  "frame_indices": [
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   3
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    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.12244897959183673,
    "image_path": "cases/youtube_vis__c51821b990/rgb_1.jpg"
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    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/youtube_vis__c51821b990/rgb_3.jpg"
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  "target_mapping": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
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  "localization_source": "GMOS MOS tracks",
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 },
 {
  "qa_id": "youtube_vis__c51821b990__camera_object_distance_change__01",
  "video_id": "youtube_vis__c51821b990",
  "task": "camera_object_distance_change",
  "question": "From F1 to F3, did object A (person in olive green shirt and dark shorts holding a pink object) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "frame_indices": [
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    "image_path": "cases/youtube_vis__c51821b990/rgb_1.jpg"
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    "frame_index": 3,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.3673469387755102,
    "image_path": "cases/youtube_vis__c51821b990/rgb_3.jpg"
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   "A": "g1"
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 },
 {
  "qa_id": "youtube_vis__c6c8368e32__camera_translation_direction__00",
  "video_id": "youtube_vis__c6c8368e32",
  "task": "camera_translation_direction",
  "question": "From F6 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "forward",
   "backward",
   "up",
   "right",
   "down"
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  "frame_indices": [
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    "released_frame_index": 26,
    "released_frame_name": "00027.jpg",
    "normalized_time": 0.7428571428571429,
    "image_path": "cases/youtube_vis__c6c8368e32/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__c6c8368e32/rgb_8.jpg"
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  "target_mapping": {
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  "target_descriptions": {
   "A": "orange car driving on the track"
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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 {
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  "video_id": "youtube_vis__c6c8368e32",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (orange car driving on the track) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "backward",
   "right",
   "up",
   "forward",
   "left"
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  "frame_indices": [
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    "image_path": "cases/youtube_vis__c6c8368e32/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 35,
    "released_frame_name": "00036.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__c6c8368e32/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "orange car driving on the track"
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   "bootstrap_direction_agreement": 1.0,
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__c7c2860db3__object_world_motion_direction__00",
  "video_id": "youtube_vis__c7c2860db3",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F5, in which dominant direction did object A (person in white shirt and black shorts playing tennis) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "left",
   "forward",
   "right",
   "up",
   "down",
   "backward"
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  "answer_index": 0,
  "frame_indices": [
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    "released_frame_name": "00005.jpg",
    "normalized_time": 0.11428571428571428,
    "image_path": "cases/youtube_vis__c7c2860db3/rgb_1.jpg"
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   {
    "frame_index": 5,
    "released_frame_index": 22,
    "released_frame_name": "00023.jpg",
    "normalized_time": 0.6285714285714286,
    "image_path": "cases/youtube_vis__c7c2860db3/rgb_5.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "person in white shirt and black shorts playing tennis"
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   "bootstrap_direction_agreement": 1.0,
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__ca4b99cbac__object_world_motion_direction__00",
  "video_id": "youtube_vis__ca4b99cbac",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F8, in which dominant direction did object A (zebra with black and white stripes) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "left",
  "options": [
   "up",
   "down",
   "right",
   "backward",
   "left",
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  "answer_index": 4,
  "frame_indices": [
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  "frame_references": [
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    "released_frame_index": 5,
    "released_frame_name": "00006.jpg",
    "normalized_time": 0.2631578947368421,
    "image_path": "cases/youtube_vis__ca4b99cbac/rgb_2.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 19,
    "released_frame_name": "00020.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__ca4b99cbac/rgb_8.jpg"
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  ],
  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
   "A": "zebra with black and white stripes"
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
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   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__cbb410da64__camera_translation_direction__00",
  "video_id": "youtube_vis__cbb410da64",
  "task": "camera_translation_direction",
  "question": "From F3 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "up",
   "right",
   "forward",
   "backward",
   "down",
   "left"
  ],
  "answer_index": 2,
  "frame_indices": [
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  "frame_references": [
   {
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    "released_frame_index": 7,
    "released_frame_name": "00008.jpg",
    "normalized_time": 0.3888888888888889,
    "image_path": "cases/youtube_vis__cbb410da64/rgb_3.jpg"
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   {
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    "released_frame_index": 11,
    "released_frame_name": "00012.jpg",
    "normalized_time": 0.6111111111111112,
    "image_path": "cases/youtube_vis__cbb410da64/rgb_5.jpg"
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  ],
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "group": "HLL",
  "manual_review": false
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 {
  "qa_id": "youtube_vis__cfddad4954__object_world_motion_direction__00",
  "video_id": "youtube_vis__cfddad4954",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object A (silhouette of a person standing on the beach) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "forward",
   "backward",
   "up",
   "right",
   "left"
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  "frame_indices": [
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   8
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    "released_frame_index": 49,
    "released_frame_name": "00050.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__cfddad4954/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
   "A": "g1"
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "min_forward_coverage": 0.25,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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 {
  "qa_id": "youtube_vis__cfddad4954__camera_object_distance_change__01",
  "video_id": "youtube_vis__cfddad4954",
  "task": "camera_object_distance_change",
  "question": "From F3 to F8, did object A (silhouette of a person standing on the beach) become closer to or farther from the camera? Compare 3D Euclidean range.",
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  "options": [
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  "frame_indices": [
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   8
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    "released_frame_index": 49,
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    "image_path": "cases/youtube_vis__cfddad4954/rgb_8.jpg"
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  "target_mapping": {
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  "target_descriptions": {
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
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 {
  "qa_id": "youtube_vis__cff8191891__camera_translation_direction__00",
  "video_id": "youtube_vis__cff8191891",
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   "right",
   "left",
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    "released_frame_name": "00010.jpg",
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  "target_mapping": {
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  "target_descriptions": {
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  "video_id": "youtube_vis__cff8191891",
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   "left"
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    "image_path": "cases/youtube_vis__cff8191891/rgb_0.jpg"
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  "question": "From F0 to F3, did object A (white and orange front of a train approaching on the tracks) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
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  "frame_indices": [
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 {
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  "video_id": "youtube_vis__d0b1e8b322",
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  "question": "From F2 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
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 {
  "qa_id": "youtube_vis__d2b026739a__camera_translation_direction__00",
  "video_id": "youtube_vis__d2b026739a",
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   "backward",
   "down"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 {
  "qa_id": "youtube_vis__d3b2cc407e__object_world_motion_direction__00",
  "video_id": "youtube_vis__d3b2cc407e",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (person in dark shirt riding a small wheeled vehicle) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
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  "options": [
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   "right",
   "down",
   "up",
   "backward",
   "left"
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  "frame_indices": [
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   {
    "frame_index": 6,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.75,
    "image_path": "cases/youtube_vis__d3b2cc407e/rgb_6.jpg"
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  "target_mapping": {
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_ratio": 1.5,
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   "bootstrap_gap": 0.05,
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   "min_intervals": 2,
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   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
  "qa_id": "youtube_vis__d3b2cc407e__camera_object_distance_change__01",
  "video_id": "youtube_vis__d3b2cc407e",
  "task": "camera_object_distance_change",
  "question": "From F4 to F6, did object A (person in dark shirt riding a small wheeled vehicle) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
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   "closer"
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  "frame_indices": [
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   6
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    "normalized_time": 0.5,
    "image_path": "cases/youtube_vis__d3b2cc407e/rgb_4.jpg"
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    "frame_index": 6,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.75,
    "image_path": "cases/youtube_vis__d3b2cc407e/rgb_6.jpg"
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_ratio": 1.5,
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   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
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   "up",
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    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__d3f5c309cc/rgb_8.jpg"
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "video_id": "youtube_vis__d4a607ad81",
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  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "right"
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    "frame_index": 8,
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    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__d4a607ad81/rgb_8.jpg"
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   "bootstrap_direction_agreement": 0.95
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  "units": "sequence background depths, not meters",
  "split": "development",
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  "localization_source": "GMOS MOS tracks",
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  "video_id": "youtube_vis__d4a607ad81",
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  "options": [
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   "right",
   "down",
   "up"
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  "frame_indices": [
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    "frame_index": 8,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__d4a607ad81/rgb_8.jpg"
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  "target_mapping": {
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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  "split": "development",
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 {
  "qa_id": "youtube_vis__dc4e812347__object_world_motion_direction__00",
  "video_id": "youtube_vis__dc4e812347",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F6, in which dominant direction did object A (small brown dog) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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   "right",
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   "up"
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 {
  "qa_id": "youtube_vis__dd6c46053c__camera_object_distance_change__00",
  "video_id": "youtube_vis__dd6c46053c",
  "task": "camera_object_distance_change",
  "question": "From F3 to F6, did object A (tennis player in orange shirt and shorts) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "camera_object_range_abs": 0.1,
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   "min_intervals": 2,
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   "seed_count": 256,
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   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__de2606b73a__camera_view_direction_change__00",
  "video_id": "youtube_vis__de2606b73a",
  "task": "camera_view_direction_change",
  "question": "From F0 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
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   {
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "qa_id": "youtube_vis__de79f45168__object_world_motion_direction__00",
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  "question": "After compensating for camera motion from F1 to F3, in which dominant direction did object B (person in red shirt and black shorts) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
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    "released_frame_index": 18,
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    "normalized_time": 0.3829787234042553,
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    "released_frame_name": "00020.jpg",
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  "question": "From F6 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F6?",
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   "down"
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    "frame_index": 8,
    "released_frame_index": 35,
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    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__e0de82caa7/rgb_8.jpg"
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  "video_id": "youtube_vis__e0de82caa7",
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   "backward",
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   {
    "frame_index": 8,
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    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__e0de82caa7/rgb_8.jpg"
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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  "split": "development",
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  "video_id": "youtube_vis__e1eff80c9a",
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  "question": "From F0 to F6, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
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   "left"
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  "target_mapping": {
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "youtube_vis__e1eff80c9a__object_world_motion_direction__01",
  "video_id": "youtube_vis__e1eff80c9a",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F0 to F6, in which dominant direction did object A (man in dark blue jacket and conductor hat) move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
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  "video_id": "youtube_vis__e979fce0d2",
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  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__ed8d7e7513__object_world_motion_direction__01",
  "video_id": "youtube_vis__ed8d7e7513",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F7, in which dominant direction did object A (snowboarder in orange pants) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "right",
   "backward",
   "down",
   "left",
   "up",
   "forward"
  ],
  "answer_index": 5,
  "frame_indices": [
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   7
  ],
  "frame_references": [
   {
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    "released_frame_index": 11,
    "released_frame_name": "00012.jpg",
    "normalized_time": 0.3793103448275862,
    "image_path": "cases/youtube_vis__ed8d7e7513/rgb_3.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 25,
    "released_frame_name": "00026.jpg",
    "normalized_time": 0.8620689655172413,
    "image_path": "cases/youtube_vis__ed8d7e7513/rgb_7.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "snowboarder in orange pants"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    0.02119489179971243,
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   ],
   "dominant_component_bootstrap95": [
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    0.5972391041470191
   ],
   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
  },
  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__ed8d7e7513__camera_object_distance_change__02",
  "video_id": "youtube_vis__ed8d7e7513",
  "task": "camera_object_distance_change",
  "question": "From F3 to F7, did object A (snowboarder in orange pants) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "farther",
  "options": [
   "farther",
   "closer"
  ],
  "answer_index": 0,
  "frame_indices": [
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   7
  ],
  "frame_references": [
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    "released_frame_index": 11,
    "released_frame_name": "00012.jpg",
    "normalized_time": 0.3793103448275862,
    "image_path": "cases/youtube_vis__ed8d7e7513/rgb_3.jpg"
   },
   {
    "frame_index": 7,
    "released_frame_index": 25,
    "released_frame_name": "00026.jpg",
    "normalized_time": 0.8620689655172413,
    "image_path": "cases/youtube_vis__ed8d7e7513/rgb_7.jpg"
   }
  ],
  "object_ids": [
   "g1"
  ],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "snowboarder in orange pants"
  },
  "evidence": {
   "ranges_depths": [
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    0.5587456105934782,
    0.6240005082135484,
    0.7111871529343718,
    0.7231151947009907
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   "delta_depths": 0.17065339822545322,
   "relative_change": 0.30889628805855285,
   "range_change_bootstrap95": [
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    0.17663926778760516
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  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__edcf78a43b__camera_translation_direction__00",
  "video_id": "youtube_vis__edcf78a43b",
  "task": "camera_translation_direction",
  "question": "From F2 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
   "backward",
   "down",
   "right",
   "up",
   "forward"
  ],
  "answer_index": 5,
  "frame_indices": [
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   8
  ],
  "frame_references": [
   {
    "frame_index": 2,
    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.2608695652173913,
    "image_path": "cases/youtube_vis__edcf78a43b/rgb_2.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 23,
    "released_frame_name": "00024.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__edcf78a43b/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "dark brown horse"
  },
  "evidence": {
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    -0.011070869747636899,
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__edcf78a43b__camera_view_direction_change__01",
  "video_id": "youtube_vis__edcf78a43b",
  "task": "camera_view_direction_change",
  "question": "From F2 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
  "answer": "right",
  "options": [
   "up",
   "right",
   "down",
   "left"
  ],
  "answer_index": 1,
  "frame_indices": [
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   8
  ],
  "frame_references": [
   {
    "frame_index": 2,
    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.2608695652173913,
    "image_path": "cases/youtube_vis__edcf78a43b/rgb_2.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 23,
    "released_frame_name": "00024.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__edcf78a43b/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "dark brown horse"
  },
  "evidence": {
   "yaw_deg": 17.777854410908116,
   "pitch_deg": -2.7704528062880462,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__edcf78a43b__object_world_motion_direction__02",
  "video_id": "youtube_vis__edcf78a43b",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object B (dark brown horse) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "right",
  "options": [
   "backward",
   "up",
   "right",
   "left",
   "forward",
   "down"
  ],
  "answer_index": 2,
  "frame_indices": [
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   8
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  "frame_references": [
   {
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    "released_frame_index": 9,
    "released_frame_name": "00010.jpg",
    "normalized_time": 0.391304347826087,
    "image_path": "cases/youtube_vis__edcf78a43b/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 23,
    "released_frame_name": "00024.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__edcf78a43b/rgb_8.jpg"
   }
  ],
  "object_ids": [
   "g3"
  ],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
  },
  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "dark brown horse"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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    -0.009252450765409048,
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   "dominant_component_bootstrap95": [
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   "bootstrap_direction_agreement": 1.0,
   "min_bootstrap_direction_agreement": 0.95
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  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__edd663afa3__camera_view_direction_change__00",
  "video_id": "youtube_vis__edd663afa3",
  "task": "camera_view_direction_change",
  "question": "From F0 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
   "right",
   "up",
   "down",
   "left"
  ],
  "answer_index": 3,
  "frame_indices": [
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   5
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  "frame_references": [
   {
    "frame_index": 0,
    "released_frame_index": 0,
    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/youtube_vis__edd663afa3/rgb_0.jpg"
   },
   {
    "frame_index": 5,
    "released_frame_index": 22,
    "released_frame_name": "00023.jpg",
    "normalized_time": 0.6285714285714286,
    "image_path": "cases/youtube_vis__edd663afa3/rgb_5.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "tracked object [g1]"
  },
  "evidence": {
   "yaw_deg": -15.79589337277413,
   "pitch_deg": 0.1158499150879868,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHL",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__ef6c2a2fb0__camera_view_direction_change__00",
  "video_id": "youtube_vis__ef6c2a2fb0",
  "task": "camera_view_direction_change",
  "question": "From F3 to F8, toward which direction did the camera optical axis turn, using the camera axes frozen at F3?",
  "answer": "left",
  "options": [
   "right",
   "left",
   "up",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
   3,
   8
  ],
  "frame_references": [
   {
    "frame_index": 3,
    "released_frame_index": 6,
    "released_frame_name": "00007.jpg",
    "normalized_time": 0.35294117647058826,
    "image_path": "cases/youtube_vis__ef6c2a2fb0/rgb_3.jpg"
   },
   {
    "frame_index": 8,
    "released_frame_index": 17,
    "released_frame_name": "00018.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__ef6c2a2fb0/rgb_8.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g3"
  },
  "target_descriptions": {
   "A": "tracked object [g3]"
  },
  "evidence": {
   "yaw_deg": -17.032584237661244,
   "pitch_deg": -4.3816852974681835,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
  },
  "thresholds": {
   "camera_translation": 0.1,
   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
  "manual_review": false
 },
 {
  "qa_id": "youtube_vis__ef96501dd0__object_world_motion_direction__00",
  "video_id": "youtube_vis__ef96501dd0",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object A (copper-colored cougar walking on a fallen tree branch) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "forward",
   "up",
   "left",
   "down",
   "backward",
   "right"
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 {
  "qa_id": "youtube_vis__f272aea880__object_world_motion_direction__00",
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 {
  "qa_id": "youtube_vis__f38e5aa5b4__object_travel_distance_comparison__03",
  "video_id": "youtube_vis__f38e5aa5b4",
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  "question": "Over the sampled trajectory from F0 through F5, which object traveled a greater cumulative 3D distance after compensating for camera motion: A (white city bus with number 1303 and route M1) or B (person in dark jacket and green pants)? Sum consecutive sampled 3D displacements, rather than using only the start-to-end displacement.",
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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 {
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  "video_id": "youtube_vis__f4dd51ac35",
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  "question": "From F0 to F3, did object A (person in black shirt riding a bicycle) become closer to or farther from the camera? Compare 3D Euclidean range.",
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   "closer"
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    "image_path": "cases/youtube_vis__f4dd51ac35/rgb_3.jpg"
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
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  "video_id": "youtube_vis__f8d9c1eaf7",
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  "question": "After compensating for camera motion from F3 to F8, in which dominant direction did object A (person in black wetsuit wakeboarding) move? Use the camera axes frozen at F3: right/down/forward are +x/+y/+z.",
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   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "group": "HLH",
  "manual_review": false
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 {
  "qa_id": "youtube_vis__f8fb020f47__camera_translation_direction__00",
  "video_id": "youtube_vis__f8fb020f47",
  "task": "camera_translation_direction",
  "question": "From F0 to F6, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "backward",
   "up",
   "forward",
   "left",
   "down"
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  "frame_indices": [
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   6
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    "image_path": "cases/youtube_vis__f8fb020f47/rgb_0.jpg"
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    "released_frame_index": 22,
    "released_frame_name": "00023.jpg",
    "normalized_time": 0.7586206896551724,
    "image_path": "cases/youtube_vis__f8fb020f47/rgb_6.jpg"
   }
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  "object_ids": [],
  "target_mapping": {
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  },
  "target_descriptions": {
   "A": "cyclist in black jacket and helmet"
  },
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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   "object_translation": 0.1,
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   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "min_intervals": 2,
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   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "youtube_vis__f8fb020f47__object_world_motion_direction__01",
  "video_id": "youtube_vis__f8fb020f47",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F4 to F6, in which dominant direction did object A (cyclist in black jacket and helmet) move? Use the camera axes frozen at F4: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
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   "left",
   "backward",
   "up",
   "right",
   "forward"
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  "frame_indices": [
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   6
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    "frame_index": 6,
    "released_frame_index": 22,
    "released_frame_name": "00023.jpg",
    "normalized_time": 0.7586206896551724,
    "image_path": "cases/youtube_vis__f8fb020f47/rgb_6.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "HLH",
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 },
 {
  "qa_id": "youtube_vis__f9cac1e19b__object_world_motion_direction__00",
  "video_id": "youtube_vis__f9cac1e19b",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F6 to F8, in which dominant direction did object A (white truck cab) move? Use the camera axes frozen at F6: right/down/forward are +x/+y/+z.",
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   "left",
   "up",
   "down",
   "backward",
   "forward"
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  "frame_indices": [
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    "released_frame_index": 17,
    "released_frame_name": "00018.jpg",
    "normalized_time": 0.7391304347826086,
    "image_path": "cases/youtube_vis__f9cac1e19b/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 23,
    "released_frame_name": "00024.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__f9cac1e19b/rgb_8.jpg"
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  "object_ids": [
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  "target_mapping": {
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
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   "min_track_survival": 0.15,
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   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
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  "group": "LLH",
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 {
  "qa_id": "youtube_vis__f9cac1e19b__camera_object_distance_change__01",
  "video_id": "youtube_vis__f9cac1e19b",
  "task": "camera_object_distance_change",
  "question": "From F6 to F8, did object A (white truck cab) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
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    "released_frame_name": "00018.jpg",
    "normalized_time": 0.7391304347826086,
    "image_path": "cases/youtube_vis__f9cac1e19b/rgb_6.jpg"
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   {
    "frame_index": 8,
    "released_frame_index": 23,
    "released_frame_name": "00024.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__f9cac1e19b/rgb_8.jpg"
   }
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  "object_ids": [
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  "target_mapping": {
   "A": "g4"
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  "target_descriptions": {
   "A": "white truck cab"
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   "delta_depths": -0.6466983158082424,
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   "range_change_bootstrap95": [
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LLH",
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 {
  "qa_id": "youtube_vis__f9f3852526__camera_view_direction_change__00",
  "video_id": "youtube_vis__f9f3852526",
  "task": "camera_view_direction_change",
  "question": "From F0 to F4, toward which direction did the camera optical axis turn, using the camera axes frozen at F0?",
  "answer": "left",
  "options": [
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   "right"
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  "frame_indices": [
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/youtube_vis__f9f3852526/rgb_0.jpg"
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   {
    "frame_index": 4,
    "released_frame_index": 18,
    "released_frame_name": "00019.jpg",
    "normalized_time": 0.5142857142857142,
    "image_path": "cases/youtube_vis__f9f3852526/rgb_4.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1",
   "B": "g3"
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  "target_descriptions": {
   "A": "tracked object [g1]",
   "B": "tracked object [g3]"
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   "pitch_deg": -2.838783698381983,
   "formula": "R_end[2,:] @ R_start.T; optical-axis yaw and pitch, excluding roll"
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  "thresholds": {
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   "object_translation": 0.1,
   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
  "group": "LHH",
  "manual_review": false
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 {
  "qa_id": "youtube_vis__fa04c615cf__object_world_motion_direction__00",
  "video_id": "youtube_vis__fa04c615cf",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (person in dark clothing riding a skateboard) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
  "answer": "backward",
  "options": [
   "up",
   "backward",
   "right",
   "down",
   "left",
   "forward"
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  "answer_index": 1,
  "frame_indices": [
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    "released_frame_name": "00007.jpg",
    "normalized_time": 0.25,
    "image_path": "cases/youtube_vis__fa04c615cf/rgb_2.jpg"
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   {
    "frame_index": 5,
    "released_frame_index": 15,
    "released_frame_name": "00016.jpg",
    "normalized_time": 0.625,
    "image_path": "cases/youtube_vis__fa04c615cf/rgb_5.jpg"
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  ],
  "object_ids": [
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  "target_mapping": {
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  "target_descriptions": {
   "A": "person in dark clothing riding a skateboard"
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   "bootstrap_direction_agreement": 1.0,
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  "thresholds": {
   "camera_translation": 0.1,
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__fbd77444cd__camera_translation_direction__00",
  "video_id": "youtube_vis__fbd77444cd",
  "task": "camera_translation_direction",
  "question": "From F0 to F5, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
   "left",
   "forward",
   "backward",
   "up",
   "right",
   "down"
  ],
  "answer_index": 1,
  "frame_indices": [
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  ],
  "frame_references": [
   {
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    "released_frame_name": "00001.jpg",
    "normalized_time": 0.0,
    "image_path": "cases/youtube_vis__fbd77444cd/rgb_0.jpg"
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   {
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    "released_frame_index": 12,
    "released_frame_name": "00013.jpg",
    "normalized_time": 0.631578947368421,
    "image_path": "cases/youtube_vis__fbd77444cd/rgb_5.jpg"
   }
  ],
  "object_ids": [],
  "target_mapping": {
   "A": "g1"
  },
  "target_descriptions": {
   "A": "small grey dog with pointy ears"
  },
  "evidence": {
   "displacement_start_camera_depths": [
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   "formula": "(C_end-C_start) @ R_start.T / background_depth"
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  "thresholds": {
   "camera_translation": 0.1,
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   "direction_dominance": 2.0,
   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
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   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
  },
  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 },
 {
  "qa_id": "youtube_vis__fbd77444cd__camera_object_distance_change__01",
  "video_id": "youtube_vis__fbd77444cd",
  "task": "camera_object_distance_change",
  "question": "From F0 to F2, did object A (small grey dog with pointy ears) become closer to or farther from the camera? Compare 3D Euclidean range.",
  "answer": "closer",
  "options": [
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   "closer"
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  "frame_indices": [
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    "normalized_time": 0.2631578947368421,
    "image_path": "cases/youtube_vis__fbd77444cd/rgb_2.jpg"
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  "object_ids": [
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  "target_mapping": {
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  "target_descriptions": {
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   "object_translation": 0.1,
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
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   "camera_object_range_relative": 0.2,
   "pair_range_abs": 0.1,
   "pair_range_relative": 0.2,
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   "travel_ratio": 1.5,
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   "min_intervals": 2,
   "min_tracks": 32,
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   "sam_score": 0.8,
   "min_mask_pixels": 150,
   "min_forward_coverage": 0.25,
   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "youtube_vis__fbe53dc8e8__camera_view_direction_change__00",
  "video_id": "youtube_vis__fbe53dc8e8",
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  "question": "From F2 to F5, toward which direction did the camera optical axis turn, using the camera axes frozen at F2?",
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  "options": [
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    "normalized_time": 0.631578947368421,
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  "target_mapping": {
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  "target_descriptions": {
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 {
  "qa_id": "youtube_vis__fbe53dc8e8__object_world_motion_direction__01",
  "video_id": "youtube_vis__fbe53dc8e8",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (person in blue jeans riding a skateboard) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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    "normalized_time": 0.631578947368421,
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  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
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 {
  "qa_id": "youtube_vis__fd3dd6202e__object_world_motion_direction__00",
  "video_id": "youtube_vis__fd3dd6202e",
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  "question": "After compensating for camera motion from F2 to F5, in which dominant direction did object A (blue car) move? Use the camera axes frozen at F2: right/down/forward are +x/+y/+z.",
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   "down"
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    "normalized_time": 0.6176470588235294,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
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 {
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  "video_id": "youtube_vis__fd3dd6202e",
  "task": "camera_object_distance_change",
  "question": "From F2 to F5, did object A (blue car) become closer to or farther from the camera? Compare 3D Euclidean range.",
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    "released_frame_index": 21,
    "released_frame_name": "00022.jpg",
    "normalized_time": 0.6176470588235294,
    "image_path": "cases/youtube_vis__fd3dd6202e/rgb_5.jpg"
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   "delta_depths": 0.5065334987264029,
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   "direction_gap": 0.05,
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   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "pair_initial_separation": 0.08,
   "travel_gap": 0.1,
   "travel_ratio": 1.5,
   "travel_max_min": 0.2,
   "bootstrap_gap": 0.05,
   "min_time_span": 0.2,
   "min_intervals": 2,
   "min_tracks": 32,
   "min_track_survival": 0.15,
   "sam_score": 0.8,
   "min_mask_pixels": 150,
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   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
  "annotation_status": "model_estimated_automated_checks_only_needs_visual_review",
  "quality_status": "provisional_automated_pass",
  "localization_source": "GMOS MOS tracks",
  "geometry_thresholds_unchanged": true,
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 {
  "qa_id": "youtube_vis__fdb28d0fbb__camera_translation_direction__00",
  "video_id": "youtube_vis__fdb28d0fbb",
  "task": "camera_translation_direction",
  "question": "From F0 to F8, in which dominant direction did the camera center move? Use the camera axes frozen at F0: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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   "down",
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   "backward",
   "up"
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   {
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    "released_frame_index": 29,
    "released_frame_name": "00030.jpg",
    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__fdb28d0fbb/rgb_8.jpg"
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   "seed_count": 256,
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "localization_source": "GMOS MOS tracks",
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 {
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  "video_id": "youtube_vis__fdb28d0fbb",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F8, in which dominant direction did object A (person in dark clothing standing on snow) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
  "options": [
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   "left",
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  "frame_indices": [
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    "normalized_time": 1.0,
    "image_path": "cases/youtube_vis__fdb28d0fbb/rgb_8.jpg"
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  "target_descriptions": {
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   "direction_gap": 0.05,
   "camera_turn_deg": 15.0,
   "camera_turn_gap_deg": 8.0,
   "camera_object_range_abs": 0.1,
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   "pair_range_abs": 0.1,
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   "travel_max_min": 0.2,
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   "min_intervals": 2,
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   "max_fb_error_px": 2.0,
   "max_pair_mask_overlap": 0.05,
   "seed_count": 256,
   "bootstrap_replicates": 128,
   "bootstrap_direction_agreement": 0.95
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  "answer_source": "deterministic_VGGT_Omega_geometry_with_RAFT_large_tracks",
  "position_definition": "centroid of the same surviving core surface points; model estimate, not object center of mass",
  "units": "sequence background depths, not meters",
  "split": "development",
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  "localization_source": "GMOS MOS tracks",
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 {
  "qa_id": "youtube_vis__fdb28d0fbb__object_world_motion_direction__02",
  "video_id": "youtube_vis__fdb28d0fbb",
  "task": "object_world_motion_direction",
  "question": "After compensating for camera motion from F1 to F8, in which dominant direction did object B (person in dark clothing standing on snow) move? Use the camera axes frozen at F1: right/down/forward are +x/+y/+z.",
  "answer": "forward",
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