{
  "schema_version": "hand-warehouse/1.0",
  "validity_revision": "usable-annotation-2026-09-20",
  "annotation_validity": {
    "meaning": "annotation usable for supervision, not merely record presence",
    "formula": "source_annotation_present AND numerical_checks_pass AND applicable_official_QA_pass AND NOT explicitly_reviewed_local_exclusion",
    "without_official_qa": "omit QA term; declare source rules; do not fabricate QA",
    "policy_field": "components.<name>.valid_policy",
    "visibility_is_independent": true,
    "invalid_float_value": "NaN",
    "hot3d": "broadcast per-camera frame manual QA conservatively to hand/object labels and pose-derived visibility; retain RGB and source calibration; keep native QA in raw and review report",
    "hot3d_visibility": "native visibility_ratio[%] already ranges from 0 to 1; do not divide by 100"
  },
  "hand_slots": [
    "left",
    "right"
  ],
  "view_metadata": {
    "required_fields": [
      "view_type"
    ],
    "view_type_values": [
      "ego",
      "exo",
      "unknown"
    ],
    "view_type_policy": "required per camera view; use ego or exo whenever the source data or capture setup establishes the viewpoint; use unknown only when no trustworthy source determines it; never omit or guess"
  },
  "keypoints": {
    "mano21/v1": {
      "count": 21,
      "names": [
        "wrist",
        "thumb_1",
        "thumb_2",
        "thumb_3",
        "thumb_4",
        "index_1",
        "index_2",
        "index_3",
        "index_4",
        "middle_1",
        "middle_2",
        "middle_3",
        "middle_4",
        "ring_1",
        "ring_2",
        "ring_3",
        "ring_4",
        "little_1",
        "little_2",
        "little_3",
        "little_4"
      ],
      "source_index_map": null,
      "note": "adapter maps official MANO joint and fingertip convention"
    },
    "rhd21/v1": {
      "count": 21,
      "names": [
        "wrist",
        "thumb_1",
        "thumb_2",
        "thumb_3",
        "thumb_4",
        "index_1",
        "index_2",
        "index_3",
        "index_4",
        "middle_1",
        "middle_2",
        "middle_3",
        "middle_4",
        "ring_1",
        "ring_2",
        "ring_3",
        "ring_4",
        "little_1",
        "little_2",
        "little_3",
        "little_4"
      ],
      "source_index_map_per_hand": [
        0,
        4,
        3,
        2,
        1,
        8,
        7,
        6,
        5,
        12,
        11,
        10,
        9,
        16,
        15,
        14,
        13,
        20,
        19,
        18,
        17
      ]
    }
  },
  "camera": {
    "opencv_fisheye4": {
      "K": [
        3,
        3
      ],
      "distortion": [
        "k1",
        "k2",
        "k3",
        "k4"
      ],
      "projection": "theta=atan(r); theta_d=theta*(1+k1*theta^2+k2*theta^4+k3*theta^6+k4*theta^8); source ReInterHand"
    },
    "pinhole": {
      "K": [
        3,
        3
      ]
    },
    "fisheye624": {
      "parameters": [
        "f",
        "cx",
        "cy",
        "k0",
        "k1",
        "k2",
        "k3",
        "k4",
        "k5",
        "p0",
        "p1",
        "s0",
        "s1",
        "s2",
        "s3"
      ]
    },
    "rational8": {
      "K": [
        3,
        3
      ],
      "distortion": [
        "k1",
        "k2",
        "p1",
        "p2",
        "k3",
        "k4",
        "k5",
        "k6"
      ]
    }
  },
  "segmentation": {
    "segment/uint16_labels/v1": {
      "storage": "mask.mkv",
      "dtype": "uint16",
      "mapping": "instances.jsonl",
      "valid_shape": [
        "T"
      ],
      "required_metadata": [
        "segmentation_type",
        "coverage",
        "mapping_ref",
        "storage"
      ],
      "shape": [
        "T",
        "H",
        "W"
      ],
      "reserved_codes": {
        "0": "unassigned",
        "65535": "ignore"
      },
      "region_codes": [
        1,
        65534
      ],
      "allowed_storage_profiles": [
        "mkv/uint16_ffv1/v1"
      ]
    },
    "segment/instance_polygons/v1": {
      "storage": "polygons.jsonl",
      "mapping": "instances.jsonl",
      "frame_keys": [
        "frame_index",
        "instances"
      ],
      "instance_keys": [
        "mask_value",
        "polygons"
      ],
      "coordinate_unit": "pixel",
      "overlap_allowed": true,
      "valid_shape": [
        "T"
      ],
      "required_metadata": [
        "segmentation_type",
        "coverage",
        "mapping_ref"
      ],
      "polygon_shape": [
        "N",
        2
      ],
      "holes_supported": false
    },
    "segment/foreground_intensity/v1": {
      "storage": "mask.mkv",
      "dtype": "uint16",
      "value_range": [
        0,
        255
      ],
      "normalization_scale": 0.00392156862745098,
      "axes": [
        "T",
        "height",
        "width"
      ],
      "meaning": "native hand foreground intensity; individual hand or union declared in metadata; not instance codes or calibrated probability",
      "zero": "background",
      "full_scale": "foreground",
      "mapping": "foreground_category in component metadata",
      "valid_shape": [
        "T"
      ],
      "required_metadata": [
        "segmentation_type",
        "coverage",
        "value_range",
        "normalization_scale",
        "foreground_category",
        "entity_id",
        "storage"
      ],
      "shape": [
        "T",
        "H",
        "W"
      ],
      "allowed_storage_profiles": [
        "mkv/uint16_ffv1/v1"
      ]
    }
  },
  "note": "Registry for hand-warehouse/1.0. Read CONTRACT.md for field semantics. This is not a JSON Schema document or executable validator.",
  "components": {
    "mano/axis_angle61/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        2,
        61
      ],
      "valid_shape": [
        "T",
        2
      ],
      "unit": "m",
      "angle_unit": "rad",
      "coordinate_frame": "camera",
      "layout": {
        "pose_axis_angle": [
          0,
          48
        ],
        "shape": [
          48,
          58
        ],
        "translation": [
          58,
          61
        ]
      }
    },
    "keypoints/uv/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        2,
        21,
        2
      ],
      "valid_shape": [
        "T",
        2,
        21
      ],
      "unit": "pixel",
      "required_metadata": [
        "keypoint_schema"
      ]
    },
    "keypoints/xyz/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        2,
        21,
        3
      ],
      "valid_shape": [
        "T",
        2,
        21
      ],
      "unit": "m",
      "required_metadata": [
        "keypoint_schema"
      ]
    },
    "depth/z_float32/v1": {
      "storage": "mkv",
      "dtype": "float32",
      "shape": [
        "T",
        "H",
        "W"
      ],
      "valid_shape": [
        "T",
        "H",
        "W"
      ],
      "unit": "m",
      "depth_type": "z",
      "pixel_grid": "current_rgb",
      "coordinate_frame": "current_rgb_camera",
      "valid_storage": "mkv",
      "allowed_storage_profiles": [
        "mkv/depth_float32_bits/v1"
      ],
      "allowed_valid_storage_profiles": [
        "mkv/bool_ffv1/v1"
      ],
      "required_metadata": [
        "storage",
        "valid_storage",
        "depth_origin"
      ],
      "depth_origin_values": [
        "measured",
        "rendered",
        "unknown"
      ]
    },
    "transform/se3/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        4,
        4
      ],
      "valid_shape": [
        "T"
      ],
      "unit": "m",
      "required_metadata": [
        "convention"
      ]
    },
    "object/rigid/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        4,
        4
      ],
      "valid_shape": [
        "T"
      ],
      "unit": "m",
      "required_metadata": [
        "convention"
      ]
    },
    "camera/pinhole/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        3,
        3
      ],
      "valid_shape": [
        "T"
      ]
    },
    "camera/rational8/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        3,
        3
      ],
      "valid_shape": [
        "T"
      ]
    },
    "camera/opencv_fisheye4/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        3,
        3
      ],
      "valid_shape": [
        "T"
      ]
    },
    "camera/fisheye624/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        15
      ],
      "valid_shape": [
        "T"
      ]
    },
    "camera/distortion8/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        8
      ],
      "valid_shape": [
        "T"
      ]
    },
    "camera/fisheye4_distortion/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        4
      ],
      "valid_shape": [
        "T"
      ]
    },
    "object/joint_state/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        "J"
      ],
      "valid_shape": [
        "T",
        "J"
      ],
      "required_metadata": [
        "joint_order"
      ],
      "unit_rule": "revolute radians; prismatic metres; mixed types declared per joint"
    },
    "object_keypoints/camera/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        "K",
        3
      ],
      "valid_shape": [
        "T",
        "K"
      ],
      "unit": "m",
      "coordinate_frame": "camera",
      "required_metadata": [
        "keypoint_schema"
      ]
    },
    "object/dimensions/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        3
      ],
      "valid_shape": [
        "T"
      ],
      "unit": "m",
      "required_metadata": [
        "dimensions_semantics"
      ],
      "axis_order": [
        "length",
        "width",
        "height"
      ],
      "scale_rule": "do not apply to mesh without source-supported size/scale relation"
    },
    "object_keypoints/template/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "K",
        3
      ],
      "valid_shape": [
        "K"
      ],
      "unit": "m",
      "coordinate_frame": "object",
      "static": true,
      "required_metadata": [
        "keypoint_schema"
      ]
    },
    "mesh/obj/v1": {
      "storage": "obj",
      "unit": "m",
      "static": true,
      "valid_shape": [],
      "dependencies": "MTL and textures retained under owning object"
    },
    "rgb/uint8/v1": {
      "storage": "mkv",
      "dtype": "uint8",
      "shape": [
        "T",
        "H",
        "W",
        3
      ],
      "valid_shape": [
        "T"
      ],
      "color_order": "RGB",
      "allowed_storage_profiles": [
        "mkv/mjpeg_copy/v1",
        "mkv/source_copy/v1",
        "mkv/h264_rgb_lossless/v1",
        "mkv/ffv1_rgb/v1"
      ],
      "required_metadata": [
        "storage"
      ]
    },
    "contact/relations/v1": {
      "storage": "jsonl",
      "valid_shape": [
        "T"
      ],
      "frame_keys": [
        "frame_index",
        "relations"
      ],
      "absence_semantics": "no record is not a negative contact annotation"
    },
    "contact/vertex_region/v1": {
      "storage": "pt",
      "dtype": "bool",
      "shape": [
        "T",
        "V"
      ],
      "valid_shape": [
        "T",
        "V"
      ],
      "required_metadata": [
        "source_geometry_ref",
        "target_geometry_ref",
        "topology_id"
      ],
      "pilot_status": "defined_not_empirically_validated"
    },
    "contact/vertex_distance/v1": {
      "storage": "pt",
      "dtype": "float32",
      "shape": [
        "T",
        "V"
      ],
      "valid_shape": [
        "T",
        "V"
      ],
      "unit": "m",
      "required_metadata": [
        "source_geometry_ref",
        "target_geometry_ref",
        "topology_id",
        "distance_definition"
      ],
      "pilot_status": "defined_not_empirically_validated"
    },
    "object/articulated/v1": {
      "storage": "json",
      "required_keys": [
        "parts",
        "joints"
      ],
      "part_keys": [
        "part_id",
        "parent_id",
        "has_model",
        "mesh_ref"
      ],
      "hierarchy_semantics": "declare mechanical articulation or semantic containment; containment alone does not imply joints",
      "acyclic": true
    },
    "segment/uint16_labels/v1": {
      "storage": "mkv",
      "dtype": "uint16",
      "mapping": "instances.jsonl",
      "valid_shape": [
        "T"
      ],
      "required_metadata": [
        "segmentation_type",
        "coverage",
        "mapping_ref",
        "storage"
      ],
      "shape": [
        "T",
        "H",
        "W"
      ],
      "reserved_codes": {
        "0": "unassigned",
        "65535": "ignore"
      },
      "region_codes": [
        1,
        65534
      ],
      "allowed_storage_profiles": [
        "mkv/uint16_ffv1/v1"
      ]
    },
    "segment/instance_polygons/v1": {
      "storage": "jsonl",
      "mapping": "instances.jsonl",
      "frame_keys": [
        "frame_index",
        "instances"
      ],
      "instance_keys": [
        "mask_value",
        "polygons"
      ],
      "coordinate_unit": "pixel",
      "overlap_allowed": true,
      "valid_shape": [
        "T"
      ],
      "required_metadata": [
        "segmentation_type",
        "coverage",
        "mapping_ref"
      ],
      "polygon_shape": [
        "N",
        2
      ],
      "holes_supported": false
    },
    "segment/foreground_intensity/v1": {
      "storage": "mkv",
      "dtype": "uint16",
      "value_range": [
        0,
        255
      ],
      "normalization_scale": 0.00392156862745098,
      "axes": [
        "T",
        "height",
        "width"
      ],
      "meaning": "native hand foreground intensity; individual hand or union declared in metadata; not instance codes or calibrated probability",
      "zero": "background",
      "full_scale": "foreground",
      "mapping": "foreground_category in component metadata",
      "valid_shape": [
        "T"
      ],
      "required_metadata": [
        "segmentation_type",
        "coverage",
        "value_range",
        "normalization_scale",
        "foreground_category",
        "entity_id",
        "storage"
      ],
      "shape": [
        "T",
        "H",
        "W"
      ],
      "allowed_storage_profiles": [
        "mkv/uint16_ffv1/v1"
      ]
    }
  },
  "storage_revision": "lossless-video-2026-09-18",
  "sampling": {
    "image": {
      "single": {
        "T": 1
      },
      "independent": {
        "T": ">=2",
        "required_frame_fields": [
          "sample_id",
          "source_locator"
        ],
        "temporal_relationship": false
      },
      "source_fps": null
    },
    "video": {
      "sampling_types": [
        "dense",
        "sparse"
      ]
    }
  },
  "storage_profiles": {
    "mkv/mjpeg_copy/v1": {
      "container": "matroska",
      "codec": "mjpeg",
      "method": "stream_copy_from_source_jpeg",
      "logical_dtype": "uint8",
      "decoded_pixel_format": "rgb24",
      "validation": [
        "source_jpeg_packet_sha256_exact",
        "all_packet_count_order_and_dimensions_exact",
        "deterministic_decoded_rgb_sample_exact",
        "pilot_and_final_selected_whole_sequences_decoded_rgb_exact"
      ],
      "validation_policy": {
        "id": "jpeg-packets-all-rgb-sample16/v1",
        "sample_count_per_view": 16,
        "short_views": "all_frames_if_T_less_than_16",
        "fixed_indices": "0,T-1,T//4,T//2,3*T//4, deduplicated",
        "remaining_indices": "sample without replacement to min(T,16) using Python random.Random(seed)",
        "seed": "first 8 bytes of SHA256(sequence_id/camera_id/20260920), big-endian integer",
        "report": "policy, exact selected frame indices, seed, separate packet and pixel coverage",
        "legacy_all_frame_pixel_proofs": "still accepted; preserve historical evidence"
      }
    },
    "mkv/source_copy/v1": {
      "container": "matroska",
      "codec": "source_codec_declared_in_metadata",
      "method": "stream_copy_only",
      "logical_dtype": "uint8",
      "decoded_pixel_format": "rgb24",
      "validation": [
        "no_reencoding",
        "all_decoded_rgb_frames_exact",
        "presentation_frame_order_exact"
      ]
    },
    "mkv/h264_rgb_lossless/v1": {
      "container": "matroska",
      "codec": "h264",
      "encoder": "libx264rgb",
      "crf": 0,
      "decoded_pixel_format": "rgb24",
      "logical_dtype": "uint8",
      "gop": "declared_in_encoder_parameters",
      "validation": [
        "all_decoded_rgb_frames_exact"
      ],
      "forbidden": [
        "lossy_rate_control",
        "rgb_to_yuv420_subsampling"
      ]
    },
    "mkv/ffv1_rgb/v1": {
      "container": "matroska",
      "codec": "ffv1",
      "decoded_pixel_format": "rgb24",
      "logical_dtype": "uint8",
      "validation": [
        "all_decoded_rgb_frames_exact"
      ]
    },
    "mkv/depth_float32_bits/v1": {
      "container": "matroska",
      "codec": "ffv1",
      "pixel_format": "gray16le",
      "logical_dtype": "float32",
      "logical_shape": [
        "T",
        "H",
        "W"
      ],
      "encoded_shape": [
        "T",
        "H",
        "2*W"
      ],
      "packing": "IEEE754 little-endian float32 bits; low uint16 in first W columns, high uint16 in last W columns",
      "decode": "reinterpret_float32(uint32(low) | (uint32(high) << 16))",
      "validation": [
        "all_float32_bits_exact_including_nan"
      ]
    },
    "mkv/bool_ffv1/v1": {
      "container": "matroska",
      "codec": "ffv1",
      "pixel_format": "gray",
      "logical_dtype": "bool",
      "stored_values": [
        0,
        1
      ],
      "validation": [
        "all_bool_values_exact"
      ]
    },
    "mkv/uint16_ffv1/v1": {
      "container": "matroska",
      "codec": "ffv1",
      "pixel_formats": [
        "gray",
        "gray16le"
      ],
      "logical_dtype": "uint16",
      "gray_condition": "all values <=255; decode by exact uint8-to-uint16 promotion",
      "validation": [
        "all_integer_values_exact"
      ]
    }
  },
  "video_metadata": {
    "required": [
      "profile",
      "codec",
      "pixel_format",
      "encoded_size",
      "decoder",
      "encoder_parameters",
      "source_lossy"
    ],
    "source_lossy_values": [
      true,
      false,
      "unknown"
    ],
    "timebase_role": "index_only",
    "lossless_reference": "source compressed packets or fixed-decoder source pixels; depth uses normalized standard float32 bits",
    "selection": "choose smaller complete candidate only after exact roundtrip validation"
  }
}