{
  "schema": "bay-engine-landmarks-v1",
  "owner_dimensions_applied": false,
  "classification": "photo_estimated_landmarks_conditioned_on_provisional_native_geometry",
  "photo_source": "bay-photo-reconstruction.json",
  "photo_source_sha256": "5a061a03e42dac0f4177018f65cc476c4e6fd40d6457220630323c22baa60c93",
  "owner_photo_sha256": {
    "img_6891.jpg": "51d8e8535485d0bdea20eba25d224af9a9e9d244e166822f119c48ad49d136f3",
    "img_6892.jpg": "af706cbb2829645f8115aad7ed8e56b65567a5d24d99f04c8a45654c4ab08b93",
    "img_6855.jpg": "31075ea7e983592fc62c39064d08344dbefee7073fd4fa58f863390bbb239f98",
    "img_6854.jpg": "00a029a2408dc29478191162886f45159e296b4ed9187cf7215c8b213271bc6d"
  },
  "landmarks": {
    "cap_dark_center_proxy": {
      "xyz_arbitrary": [
        1.4860400198397785,
        0.132343584783199,
        4.807695876132899
      ],
      "source_pixels": {
        "img_6891.jpg": [
          1249,
          1581
        ],
        "img_6892.jpg": [
          1078,
          1131
        ],
        "img_6855.jpg": [
          1082,
          618
        ],
        "img_6854.jpg": [
          2355,
          284
        ]
      },
      "residuals_analysis_pixels": {
        "img_6891.jpg": 0.9822558591372239,
        "img_6892.jpg": 1.4484628443797407,
        "img_6855.jpg": 0.9265837073335014,
        "img_6854.jpg": 0.3619186193673403
      }
    },
    "rear_stud_tip": {
      "xyz_arbitrary": [
        1.4383615128986005,
        0.6348675509515946,
        4.353224014889737
      ],
      "source_pixels": {
        "img_6855.jpg": [
          1066,
          747
        ],
        "img_6854.jpg": [
          2355,
          419
        ]
      },
      "residuals_analysis_pixels": {
        "img_6855.jpg": 1.5599222897103882,
        "img_6854.jpg": 1.3992784192353498
      }
    },
    "front_stud_tip": {
      "xyz_arbitrary": [
        1.5298230751711788,
        1.9758199490366544,
        2.9655417910225634
      ],
      "source_pixels": {
        "img_6855.jpg": [
          1074,
          1148
        ],
        "img_6854.jpg": [
          2441,
          856
        ]
      },
      "residuals_analysis_pixels": {
        "img_6855.jpg": 0.13999411776287102,
        "img_6854.jpg": 0.12844580850758294
      }
    }
  },
  "scale_free_cap_to_rear_stud_over_stud_span": 0.35158725081357556,
  "native_reference": {
    "stud_span_mm": 152.0,
    "stud_span_basis": "Existing provisional CAD dimension; not measured or factory-specified.",
    "rear_stud_tip_mm": [
      0,
      143,
      -40
    ],
    "front_stud_tip_mm": [
      0,
      143,
      112
    ],
    "former_cap_center_proxy_mm": [
      0,
      150,
      -128
    ],
    "selected_cap_center_proxy_mm": [
      0,
      150,
      -93
    ],
    "solved_cap_z_mm": -92.98083141448527,
    "height_difference_held_mm": 7.0
  },
  "cap_face_plane": {
    "point_ids": [
      1562,
      1757,
      1758,
      1877,
      1878,
      1879,
      1880,
      1881,
      1882,
      1885,
      1923,
      1926,
      1930,
      1931,
      1938,
      1944,
      1949,
      1950,
      1952,
      2004,
      2025,
      2055,
      2057,
      2062,
      2152,
      2153,
      2155,
      2159,
      2162,
      2174,
      2175,
      2206,
      2902,
      2904,
      2905,
      2912
    ],
    "center": [
      1.3723470108273177,
      0.09424896483525097,
      4.793232947607972
    ],
    "up_normal": [
      0.030589949594284467,
      -0.7339412280855002,
      -0.6785237863923171
    ],
    "singular_values": [
      1.1379116206310926,
      0.7386466845275097,
      0.024386960155391383
    ],
    "basis": "Supported IMG6891 annulus features; roll prior only, not gravity or a chassis plane."
  },
  "engine_mm_to_photo": {
    "rotation": [
      [
        0.9983795984468646,
        0.03157217222210337,
        0.0473431657819289
      ],
      [
        -0.010152715235595716,
        -0.719791589516807,
        0.694115977365608
      ],
      [
        0.055991961730432895,
        -0.6934718924383642,
        -0.7183046948332801
      ]
    ],
    "arbitrary_units_per_mm": 0.012709771188443353,
    "translation_arbitrary": [
      1.4050480079398913,
      2.2959690170497904,
      5.2484277605198155
    ],
    "cap_proxy_residual_native_mm": 6.940666354656669
  },
  "limits": "Manual pixels approximate stud tips and the cap dark-center proxy, not identified mechanical axes. Camera/capture assumptions are shared with the reconstruction. Residuals are image fit, not dimensional accuracy. The152mm native stud span fixes only a conditional display scale; fitted spacing is unknown. Cap ratio constrains longitudinal station while7mm tip-height difference stays estimated. The same cap evidence influences geometry and roll; it is not independent validation. No battery catalog scale, surveyed body datum, installed CAD pose, clearance or replacement path is established."
}