{
  "source": "Eight user-supplied 540x720 side-view photos; manually estimated visible hinge centres, 2026-09-21",
  "note": "No local raw images or camera calibration. Covered joints have increased uncertainty or are omitted. Do not interpret pixel coordinates as measured 3-D angles. Tip contact is constrained by MuJoCo rather than occluded tip annotations.",
  "image_size": [
    540,
    720
  ],
  "mapping": "Photos 1..4 left index/middle/ring/pinky; photos 5..8 right index/middle/ring/pinky; same prior commands",
  "photos": [
    {
      "name": "left_index",
      "view": "left",
      "pose": "index",
      "points": [
        [
          "pinky_mcp_pitch",
          232,
          371,
          8
        ],
        [
          "pinky_pip",
          219,
          269,
          6
        ],
        [
          "pinky_dip",
          219,
          158,
          8
        ],
        [
          "index_pip",
          299,
          305,
          6
        ],
        [
          "index_dip",
          373,
          343,
          7
        ],
        [
          "thumb_mcp",
          267,
          465,
          15
        ],
        [
          "thumb_ip",
          346,
          402,
          7
        ]
      ]
    },
    {
      "name": "left_middle",
      "view": "left",
      "pose": "middle",
      "points": [
        [
          "pinky_mcp_pitch",
          208,
          369,
          8
        ],
        [
          "pinky_pip",
          195,
          280,
          6
        ],
        [
          "pinky_dip",
          185,
          174,
          7
        ],
        [
          "index_pip",
          219,
          243,
          10
        ],
        [
          "index_dip",
          259,
          198,
          9
        ],
        [
          "middle_pip",
          246,
          246,
          6
        ],
        [
          "middle_dip",
          327,
          272,
          6
        ],
        [
          "thumb_mcp",
          259,
          425,
          15
        ],
        [
          "thumb_ip",
          313,
          360,
          6
        ]
      ]
    },
    {
      "name": "left_ring",
      "view": "left",
      "pose": "ring",
      "points": [
        [
          "pinky_mcp_pitch",
          266,
          398,
          9
        ],
        [
          "pinky_pip",
          255,
          316,
          6
        ],
        [
          "pinky_dip",
          251,
          222,
          7
        ],
        [
          "ring_pip",
          332,
          307,
          6
        ],
        [
          "ring_dip",
          414,
          341,
          6
        ],
        [
          "thumb_mcp",
          307,
          445,
          15
        ],
        [
          "thumb_ip",
          374,
          418,
          7
        ]
      ]
    },
    {
      "name": "left_pinky",
      "view": "left",
      "pose": "pinky",
      "points": [
        [
          "ring_mcp_pitch",
          222,
          377,
          9
        ],
        [
          "ring_pip",
          224,
          295,
          7
        ],
        [
          "ring_dip",
          230,
          202,
          8
        ],
        [
          "pinky_mcp_pitch",
          220,
          384,
          9
        ],
        [
          "pinky_pip",
          310,
          360,
          5
        ],
        [
          "pinky_dip",
          388,
          404,
          6
        ],
        [
          "thumb_mcp",
          269,
          464,
          15
        ],
        [
          "thumb_ip",
          332,
          461,
          6
        ]
      ]
    },
    {
      "name": "right_index",
      "view": "right",
      "pose": "index",
      "points": [
        [
          "middle_mcp_pitch",
          339,
          421,
          18
        ],
        [
          "middle_pip",
          325,
          292,
          6
        ],
        [
          "middle_dip",
          334,
          188,
          6
        ],
        [
          "middle_tip",
          339,
          123,
          6
        ],
        [
          "index_mcp_pitch",
          319,
          414,
          9
        ],
        [
          "index_pip",
          231,
          364,
          5
        ],
        [
          "index_dip",
          123,
          403,
          5
        ],
        [
          "thumb_mcp",
          241,
          568,
          15
        ],
        [
          "thumb_ip",
          164,
          505,
          6
        ]
      ]
    },
    {
      "name": "right_middle",
      "view": "right",
      "pose": "middle",
      "points": [
        [
          "index_mcp_pitch",
          289,
          428,
          8
        ],
        [
          "index_pip",
          284,
          320,
          6
        ],
        [
          "index_dip",
          212,
          248,
          6
        ],
        [
          "index_tip",
          164,
          199,
          8
        ],
        [
          "ring_dip",
          269,
          236,
          10
        ],
        [
          "ring_tip",
          269,
          191,
          8
        ],
        [
          "middle_pip",
          235,
          319,
          7
        ],
        [
          "middle_dip",
          140,
          343,
          6
        ],
        [
          "thumb_mcp",
          218,
          555,
          15
        ],
        [
          "thumb_ip",
          154,
          465,
          6
        ]
      ]
    },
    {
      "name": "right_ring",
      "view": "right",
      "pose": "ring",
      "points": [
        [
          "index_mcp_pitch",
          278,
          483,
          7
        ],
        [
          "index_pip",
          279,
          397,
          5
        ],
        [
          "index_dip",
          280,
          299,
          5
        ],
        [
          "index_tip",
          284,
          235,
          6
        ],
        [
          "ring_pip",
          195,
          389,
          6
        ],
        [
          "ring_dip",
          115,
          421,
          6
        ],
        [
          "thumb_mcp",
          205,
          588,
          15
        ],
        [
          "thumb_ip",
          130,
          514,
          6
        ]
      ]
    },
    {
      "name": "right_pinky",
      "view": "right",
      "pose": "pinky",
      "points": [
        [
          "index_mcp_pitch",
          309,
          438,
          7
        ],
        [
          "index_pip",
          309,
          321,
          5
        ],
        [
          "index_dip",
          317,
          203,
          6
        ],
        [
          "index_tip",
          330,
          131,
          6
        ],
        [
          "pinky_pip",
          201,
          370,
          6
        ],
        [
          "pinky_dip",
          123,
          402,
          6
        ],
        [
          "thumb_mcp",
          238,
          565,
          15
        ],
        [
          "thumb_ip",
          143,
          510,
          6
        ]
      ],
      "omitted": "Overlapping background finger identity is ambiguous; omit its two hinge points."
    }
  ]
}