{
  "slug": "example_2_window",
  "caption": "Double-hung window with white casing: outer casing, both sashes and the individual panes come out as nested rectangles.",
  "license": "CC0",
  "license_url": "http://creativecommons.org/publicdomain/zero/1.0/deed.en",
  "public_domain": true,
  "usage_terms": "Creative Commons Zero, Public Domain Dedication",
  "artist": "Tucker T",
  "source_page": "https://commons.wikimedia.org/wiki/File:Double_hung_window.jpeg",
  "commons_file": "File:Double hung window.jpeg",
  "source_image_px_wh": [
    1280,
    960
  ],
  "files": {
    "image": "example_2_window.jpg",
    "overlay": "example_2_window_quads.png",
    "debug_mosaic": "example_2_window_debug.png"
  },
  "pipeline": {
    "path": "B (network edge_map + geometric extractor)",
    "onnx_ms_cpu": 148.8,
    "extract_ms_cpu": 2534.2,
    "preprocess": {
      "img_size": 512,
      "pad": "BORDER_REPLICATE",
      "scale": 0.4,
      "offset_xy": [
        0,
        64
      ],
      "valid_mask_eroded": "5x5"
    },
    "edge_map": "hybrid_edge_map(edge_map, gray, canny_lo=20, canny_hi=53, blur_sigma=1.2, valid=eroded mask)",
    "extractor": {
      "shape": "rect",
      "nested": true,
      "max_quads": 12,
      "max_quads_note": "the max_quads highest-scoring rectangles are kept (the QuadConfig default would be 64)",
      "min_side_cov": 0.6,
      "min_mean_cov": 0.75,
      "corner_angle_deg": [
        50.0,
        130.0
      ],
      "n_lines": 500,
      "edge_thresh": 0.5
    }
  },
  "n_rectangles": 12,
  "rectangles": [
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          342.66,
          81.77
        ],
        [
          962.56,
          47.26
        ],
        [
          1072.5,
          347.89
        ],
        [
          299.68,
          387.07
        ]
      ],
      "score": 1.003,
      "side_edge_coverage": [
        1.0,
        1.0,
        1.0,
        1.0
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 33953.3,
      "refine_shift_px": 0.619
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          394.36,
          502.05
        ],
        [
          781.91,
          481.31
        ],
        [
          828.56,
          767.87
        ],
        [
          375.81,
          794.94
        ]
      ],
      "score": 1.002,
      "side_edge_coverage": [
        1.0,
        1.0,
        1.0,
        1.0
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 19530.2,
      "refine_shift_px": 2.879
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          344.17,
          418.3
        ],
        [
          1008.53,
          390.64
        ],
        [
          1118.55,
          751.01
        ],
        [
          301.62,
          798.63
        ]
      ],
      "score": 1.0,
      "side_edge_coverage": [
        0.983,
        1.0,
        1.0,
        1.0
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 44090.8,
      "refine_shift_px": 1.726
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          781.79,
          480.28
        ],
        [
          1032.43,
          466.58
        ],
        [
          1117.96,
          750.86
        ],
        [
          828.45,
          767.66
        ]
      ],
      "score": 0.99,
      "side_edge_coverage": [
        0.957,
        1.0,
        1.0,
        1.0
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 12512.3,
      "refine_shift_px": 1.864
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          324.18,
          210.91
        ],
        [
          956.14,
          177.82
        ],
        [
          1005.99,
          341.43
        ],
        [
          299.54,
          390.72
        ]
      ],
      "score": 0.988,
      "side_edge_coverage": [
        1.0,
        0.943,
        1.0,
        1.0
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 18469.0,
      "refine_shift_px": 2.882
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          216.84,
          390.65
        ],
        [
          1070.49,
          348.47
        ],
        [
          1224.06,
          780.95
        ],
        [
          127.55,
          849.24
        ]
      ],
      "score": 0.968,
      "side_edge_coverage": [
        0.969,
        1.0,
        0.907,
        0.97
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 69792.4,
      "refine_shift_px": 1.37
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          341.14,
          95.62
        ],
        [
          929.16,
          96.43
        ],
        [
          953.19,
          178.0
        ],
        [
          324.08,
          210.89
        ]
      ],
      "score": 0.966,
      "side_edge_coverage": [
        1.0,
        0.946,
        0.971,
        0.942
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 9591.9,
      "refine_shift_px": 2.581
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          364.58,
          169.2
        ],
        [
          992.59,
          133.34
        ],
        [
          1071.89,
          347.4
        ],
        [
          339.2,
          385.92
        ]
      ],
      "score": 0.948,
      "side_edge_coverage": [
        1.0,
        1.0,
        0.859,
        0.923
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 23606.6,
      "refine_shift_px": 1.505
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          323.28,
          216.27
        ],
        [
          1006.86,
          172.35
        ],
        [
          1085.52,
          384.67
        ],
        [
          294.46,
          430.01
        ]
      ],
      "score": 0.947,
      "side_edge_coverage": [
        1.0,
        0.838,
        1.0,
        0.942
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 25309.4,
      "refine_shift_px": 2.603
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          315.16,
          491.66
        ],
        [
          781.72,
          487.88
        ],
        [
          838.04,
          810.43
        ],
        [
          273.95,
          830.77
        ]
      ],
      "score": 0.938,
      "side_edge_coverage": [
        0.959,
        0.944,
        0.839,
        1.0
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 27292.3,
      "refine_shift_px": 3.204
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          344.49,
          414.66
        ],
        [
          767.42,
          407.77
        ],
        [
          829.96,
          768.44
        ],
        [
          301.77,
          798.18
        ]
      ],
      "score": 0.93,
      "side_edge_coverage": [
        0.973,
        0.803,
        0.94,
        0.993
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 28341.5,
      "refine_shift_px": 1.857
    },
    {
      "corners_xy_clockwise_from_min_x_plus_y": [
        [
          370.04,
          129.35
        ],
        [
          964.2,
          39.68
        ],
        [
          1007.33,
          175.28
        ],
        [
          361.12,
          209.64
        ]
      ],
      "score": 0.929,
      "side_edge_coverage": [
        0.868,
        0.967,
        0.964,
        0.913
      ],
      "side_contrast_coverage": [],
      "polarity": 0,
      "area_px_original": 10881.1,
      "refine_shift_px": 2.086
    }
  ],
  "note": "Coordinates are pixels of the published image (jpg, long side 1280). Corner order: clockwise from the vertex with the smallest x+y (canonical_order)."
}