{
  "schema": "underbody-photo-reconstruction-validation-v1",
  "baseline_commit": "020f2b27",
  "scope": "Export integrity, camera/track projection conventions and relative reconstruction sensitivity. Not fitted scale, CAD registration or independent dimensional validation.",
  "raw_points": 2464,
  "supported_points": 2096,
  "registered_views": 6,
  "positive_depth_observations": 8151,
  "max_exported_vs_recomputed_mean_point_error_pixels": 2.727262859991697e-13,
  "view_residuals_analysis_pixels": {
    "img_6914.jpg": {
      "observations": 836,
      "mean": 0.929949540612929,
      "p95": 2.1905922929674153,
      "max": 3.421396254357454
    },
    "img_6917.jpg": {
      "observations": 1860,
      "mean": 0.9589070679528275,
      "p95": 2.1439088768244305,
      "max": 3.5663310396522743
    },
    "img_6916.jpg": {
      "observations": 1315,
      "mean": 1.1572498739241548,
      "p95": 2.343204760551356,
      "max": 3.6210432200794314
    },
    "img_6915.jpg": {
      "observations": 1347,
      "mean": 1.1147627321408768,
      "p95": 2.2507120800350613,
      "max": 3.4502003613038617
    },
    "img_6918.jpg": {
      "observations": 1770,
      "mean": 0.8889650952748296,
      "p95": 1.998254232202047,
      "max": 3.5953588759059554
    },
    "img_6919.jpg": {
      "observations": 1023,
      "mean": 0.9863157729544358,
      "p95": 2.0777245251259426,
      "max": 3.3995373484171614
    }
  },
  "original_photo_hashes_held": 6,
  "analysis_to_public_aspect_ratios_retained": true,
  "previous_original_metadata_aspect_ratio_checks": 2,
  "other_four_original_metadata_not_claimed": true,
  "exported_ply_matches_supported_points": true,
  "existing_native_geometry_files_held": 199,
  "held_native_scope": "All baseline STEP files,all84active native mesh sources,complete body register and original upper-bay photo inputs/reconstruction/PLY.",
  "independent_camera_sensitivity": {
    "shared_images": [
      "img_6914.jpg",
      "img_6915.jpg",
      "img_6916.jpg",
      "img_6917.jpg",
      "img_6918.jpg",
      "img_6919.jpg"
    ],
    "point_pairs_observed_in_at_least_two_photos": 501,
    "robust_inliers": 495,
    "inlier_threshold_fraction_of_reference_span": 0.03,
    "relative_error_to_reference_span": {
      "median": 0.0049699729733729435,
      "p95": 0.013892218287075063,
      "max": 0.08407637190389634
    },
    "reference_span_arbitrary_units": 57.111103173032014,
    "similarity_scale": 0.9477857286159899,
    "rotation": [
      [
        0.8143942340059167,
        0.242573407547061,
        0.5271813478955083
      ],
      [
        -0.241237864368711,
        0.9677447683291966,
        -0.07262476276240325
      ],
      [
        -0.5277938275621847,
        -0.06803091446158296,
        0.8466436501059822
      ]
    ],
    "translation": [
      -0.012880101581207004,
      -0.023348228630128087,
      0.7282261405496975
    ],
    "limits": "Pipeline sensitivity only: shared photographs, different features and camera hypotheses; no independent dimensional validation or physical scale."
  },
  "limits": "Separate sparse photographic reconstruction in arbitrary units. No metric scale,body datum,ground plane,CAD registration or installed engine transform is applied. The six photographs show a supported/jacked front end;wheel and suspension positions are not an established road-loaded state. A shared SIMPLE_RADIAL camera,centered principal point and24mm starting focal prior are hypotheses. Original24mm-equivalent metadata was previously read for6915/6919 only;the other four use that camera-family assumption rather than independently recovered EXIF. The refined lens and low image residuals do not prove physical accuracy. Tracks can include cobwebs,the jack,garage/background and other non-car surfaces;no automatic semantic classification is assigned. Sparse gaps are not empty space,clearance or replacement paths. The rear silencers and entire underfloor route are not surveyed by these front views. The existing upper-bay reconstruction remains separate;no bridge or common scale is inferred. No historical two-hole camera or provisional native part dimension supplies a physical datum.",
  "sha256": {
    "underbody-photo-inputs.json": "3b470953f778bbf5fba721fb6aff8a7db3565a803d63c4aecbd36a14b73355d4",
    "underbody-photo-reconstruction.json": "a0261028c3a337592c69964c038e34c96021a7ec80be8d40e768b56217ae0a49",
    "underbody-photo-supported-points.ply": "515778ee271acc83859f9776335850cf945a362d2cc209299e3c740557a974c9"
  }
}