{
  "schema": "battery-catalog-scale-audit-v1",
  "date": "2026-10-27",
  "geometry_changed": false,
  "owner_dimensions_applied": false,
  "physical_scale_applied": false,
  "source_sha256": {
    "bay-photo-reconstruction.json": "5a061a03e42dac0f4177018f65cc476c4e6fd40d6457220630323c22baa60c93",
    "bay-engine-landmarks.json": "9f6e60c49b75c22cde577566e347c94f0f195c7722cd29fad0ee94d9e089d4b8",
    "battery-assembly-evidence.json": "a8d1d2a120423bd7524e5b5d6c6c06a66d02a547890cfaf897b19d5eefa96704"
  },
  "owner_photo_sha256": {
    "img_6891.jpg": "51d8e8535485d0bdea20eba25d224af9a9e9d244e166822f119c48ad49d136f3",
    "img_6892.jpg": "af706cbb2829645f8115aad7ed8e56b65567a5d24d99f04c8a45654c4ab08b93",
    "img_6855.jpg": "31075ea7e983592fc62c39064d08344dbefee7073fd4fa58f863390bbb239f98"
  },
  "catalog": {
    "url": "https://business.walmart.com/ip/EverStart-Maxx-Lead-Acid-Automotive-Battery-Group-Size-51R-12-Volt-500-CCA/28275660",
    "checked": "2026-10-27",
    "nominal_envelope_inches": [
      9.31,
      5.06,
      8.69
    ],
    "short_dimension_mm": 128.524,
    "basis": "Retailer catalog maximum envelope for MAXX51R; owner label identifies model family, not production-specific dimensions or lid boundary."
  },
  "landmarks": {
    "rear_upper_lid_corner": {
      "source_pixels": {
        "img_6891.jpg": [
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        ],
        "img_6892.jpg": [
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        ]
      },
      "xyz_arbitrary": [
        -0.2116597410465533,
        -3.048588804549116,
        8.052107619093976
      ],
      "fitting_residuals_source_pixels": {
        "img_6891.jpg": 0.07464903470168284,
        "img_6892.jpg": 0.07209172217819036
      },
      "additional_view": {
        "image": "img_6855.jpg",
        "observed_source_pixels": [
          778,
          27
        ],
        "projected_source_pixels": [
          776.6549665040839,
          27.411446237856353
        ],
        "residual_source_pixels": 1.406557183971751
      }
    },
    "front_upper_lid_corner": {
      "source_pixels": {
        "img_6891.jpg": [
          626,
          410
        ],
        "img_6892.jpg": [
          156,
          508
        ]
      },
      "xyz_arbitrary": [
        -0.16855759429979283,
        -2.1125936189773773,
        7.08203861159169
      ],
      "fitting_residuals_source_pixels": {
        "img_6891.jpg": 0.23715325405113344,
        "img_6892.jpg": 0.22841722751724802
      },
      "additional_view": {
        "image": "img_6855.jpg",
        "observed_source_pixels": [
          756,
          176
        ],
        "projected_source_pixels": [
          755.9975508626852,
          175.47712857885642
        ],
        "residual_source_pixels": 0.5228771570094555
      }
    },
    "label_upper_left": {
      "source_pixels": {
        "img_6891.jpg": [
          661,
          155
        ],
        "img_6892.jpg": [
          99,
          318
        ]
      },
      "xyz_arbitrary": [
        -0.1322472273806768,
        -2.99746458270491,
        7.947571384680122
      ],
      "fitting_residuals_source_pixels": {
        "img_6891.jpg": 2.0981459365036006,
        "img_6892.jpg": 2.043435051160833
      },
      "additional_view": {
        "image": "img_6855.jpg",
        "observed_source_pixels": [
          790,
          30
        ],
        "projected_source_pixels": [
          788.1301661680727,
          31.579409289741307
        ],
        "residual_source_pixels": 2.4476135854217262
      }
    }
  },
  "provisional_stud_span_mm": 152.0,
  "short_upper_edge": {
    "span_arbitrary": 1.348695170075181,
    "span_at_provisional_stud_scale_mm": 106.11482693736554,
    "stud_span_over_lid_edge": 1.432410572461455,
    "acute_angle_to_stud_axis_degrees": 0.8832302932768034,
    "stud_span_if_edge_equals_catalog_maximum_mm": 184.09913641503604
  },
  "printed_label_plane": {
    "source_image": "img_6891.jpg",
    "source_pixel_polygon": [
      [
        663.0,
        158.0
      ],
      [
        1240.0,
        244.0
      ],
      [
        1229.0,
        333.0
      ],
      [
        653.0,
        254.0
      ]
    ],
    "candidate_point_ids": [
      376,
      467,
      529,
      538,
      539,
      675,
      677,
      687,
      712,
      713,
      756,
      758,
      1090,
      1423,
      1425,
      1427,
      1432,
      1433,
      1439,
      1444,
      1445,
      1460,
      1461,
      1462,
      1463,
      1464,
      1465,
      1466,
      1469,
      1470,
      1471,
      1472,
      1474,
      1480,
      1481,
      1482,
      1483,
      1486,
      1487,
      1518,
      1519,
      1593,
      1594,
      1689,
      1907,
      1909
    ],
    "inlier_point_ids": [
      376,
      467,
      529,
      538,
      539,
      675,
      677,
      687,
      712,
      713,
      756,
      758,
      1090,
      1423,
      1427,
      1432,
      1433,
      1439,
      1444,
      1445,
      1460,
      1461,
      1462,
      1463,
      1464,
      1469,
      1470,
      1471,
      1472,
      1474,
      1480,
      1481,
      1482,
      1483,
      1486,
      1487,
      1594,
      1689,
      1907,
      1909
    ],
    "ransac_threshold_arbitrary": 0.015,
    "center": [
      0.8558239612801142,
      -2.88373112176433,
      7.8531160167044245
    ],
    "normal": [
      0.02157990386658963,
      0.7199523987634843,
      0.6936878629930139
    ],
    "singular_values": [
      2.7530266940557095,
      0.7038826188993096,
      0.041362458407174806
    ],
    "max_refined_residual_arbitrary": 0.01592780685771429
  },
  "boundary_interpretation_sensitivity": {
    "upper_lid_boundary": {
      "source_image": "img_6891.jpg",
      "source_pixels": [
        [
          641,
          142
        ],
        [
          626,
          410
        ]
      ],
      "span_arbitrary": 1.3527082264656451,
      "span_at_provisional_scale_mm": 106.43057269950113,
      "stud_span_if_equal_to_catalog_maximum_mm": 183.55297265154687
    },
    "outer_lip_projected_to_lid_plane": {
      "source_image": "img_6891.jpg",
      "source_pixels": [
        [
          641,
          142
        ],
        [
          615,
          439
        ]
      ],
      "span_arbitrary": 1.4841380126778996,
      "span_at_provisional_scale_mm": 116.77141867253957,
      "stud_span_if_equal_to_catalog_maximum_mm": 167.2981986695181
    }
  },
  "fixed_camera_pixel_sensitivity": {
    "draws": 300,
    "seed": 0,
    "uniform_pick_jitter_source_pixels": 3,
    "conditional_stud_span_mm_quantiles": {
      "p05": 166.09597649617447,
      "median": 184.15165419053892,
      "p95": 205.84024459003393
    },
    "limitations": "Fixed cameras and feature interpretation; not confidence bounds or an independent survey."
  },
  "rejected_initial_probe": {
    "reason": "Mixed top-face and lower-lip corners with up to7.35source-pixel fitting residual. Its roughly250mm implied stud span is not accepted.",
    "source_pixels": {
      "rear": {
        "img_6891.jpg": [
          633,
          145
        ],
        "img_6892.jpg": [
          66,
          304
        ]
      },
      "front": {
        "img_6891.jpg": [
          615,
          430
        ],
        "img_6892.jpg": [
          135,
          528
        ]
      }
    }
  },
  "decision": "Retain current native dimensions and existing conditional display scale. Neither the inner lid edge nor a lower lip projected onto its plane is established as the catalog maximum dimension. The battery does not yet provide an accepted metric datum.",
  "limits": "Picks were refined after inspecting label-plane projections, so the additional photograph is a fit-excluded consistency check, not a blinded test. Rounded edges, different heights, corner interpretation, camera grouping and capture-session changes remain uncertain. A nearly parallel battery/stud direction is a photo-relative observation, not a gravity/body-axis survey. No fitted stud spacing, body/engine placement, clearance or replacement path follows.",
  "next_action": "Resolve the catalog-envelope-to-visible-lid relationship or use a physically identified existing metric datum before a coordinated chassis/power-unit/exhaust revision. Do not uniformly rescale factory-sized engine internals to fit this hypothesis."
}