{
  "schema": 1,
  "scope": "Source attribution and bounded orientation support for Vumarii 2019's upper diagram; not a plaintext decryption.",
  "target": {
    "path": "archive/gaps/tr1-00-files/vumarii-2019-imgur-7a4FZ6Q.png",
    "sha256": "bfbdd8b5847e8ae87cbfbdb4cb1894e69fd2a40a90894ab4db875d1c410160a4",
    "full_dimensions_px": [
      1370,
      1370
    ],
    "upper_diagram_crop_xyxy_exclusive": [
      270,
      147,
      1100,
      739
    ],
    "upper_diagram_crop_dimensions_px": [
      830,
      592
    ]
  },
  "reference": {
    "title": "Dunhuang star map north-polar detail (British Library Or.8210/S.3326)",
    "archive_path": "archive/recon/reference-images/dunhuang-star-map.jpg",
    "sha256": "fa7a2ac9d5530e48c36d3b04af314733cf2aba3df46257ead2f5fd019488cb1a",
    "size_bytes": 1206902,
    "source_url": "https://upload.wikimedia.org/wikipedia/commons/4/42/Dunhuang_star_map.jpg",
    "description_page": "https://commons.wikimedia.org/wiki/File:Dunhuang_star_map.jpg",
    "license_note": "Wikimedia Commons describes this scan as public domain; consult its file page for the current source/licence record.",
    "source_attribution_boundary": "The reference image is a historical chart source, not a Tengri 137 primary artifact."
  },
  "overlay": {
    "source_crop_xyxy_exclusive": [
      200,
      280,
      1760,
      1560
    ],
    "transform": "resize source crop to the target upper-diagram crop; no rotation, mirror, perspective warp, or local deformation",
    "feature_regions": [
      {
        "label": "A",
        "target_box_xyxy_exclusive": [
          0,
          252,
          132,
          388
        ],
        "source_box_xyxy_exclusive": [
          200,
          825,
          448,
          1119
        ],
        "description": "isolated west quadrilateral / three-open-circle group",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "B",
        "target_box_xyxy_exclusive": [
          247,
          0,
          398,
          124
        ],
        "source_box_xyxy_exclusive": [
          664,
          280,
          948,
          548
        ],
        "description": "upper-left W-like five-node asterism and attached loop",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "C",
        "target_box_xyxy_exclusive": [
          405,
          18,
          563,
          179
        ],
        "source_box_xyxy_exclusive": [
          961,
          319,
          1258,
          667
        ],
        "description": "upper central diamond-and-ring clusters",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "D",
        "target_box_xyxy_exclusive": [
          493,
          0,
          637,
          260
        ],
        "source_box_xyxy_exclusive": [
          1127,
          280,
          1397,
          842
        ],
        "description": "north-east dotted arc with spoke-shaped asterism",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "E",
        "target_box_xyxy_exclusive": [
          255,
          238,
          512,
          384
        ],
        "source_box_xyxy_exclusive": [
          679,
          795,
          1162,
          1110
        ],
        "description": "middle beaded chain and compact clusters",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "F",
        "target_box_xyxy_exclusive": [
          545,
          157,
          690,
          448
        ],
        "source_box_xyxy_exclusive": [
          1224,
          619,
          1497,
          1249
        ],
        "description": "east side of the enclosing wall",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "G",
        "target_box_xyxy_exclusive": [
          620,
          188,
          830,
          374
        ],
        "source_box_xyxy_exclusive": [
          1365,
          686,
          1760,
          1089
        ],
        "description": "far-east branched asterisms",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "H",
        "target_box_xyxy_exclusive": [
          164,
          400,
          612,
          592
        ],
        "source_box_xyxy_exclusive": [
          508,
          1145,
          1350,
          1560
        ],
        "description": "southern serpentine chain and square-like group",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      },
      {
        "label": "I",
        "target_box_xyxy_exclusive": [
          630,
          340,
          830,
          592
        ],
        "source_box_xyxy_exclusive": [
          1384,
          1015,
          1760,
          1560
        ],
        "description": "south-east isolated chain and compact groups",
        "boundary": "Human-auditable topology landmark, not an individual asterism identification."
      }
    ]
  },
  "geometry_support": {
    "definition": "For each target orientation, evaluate 500 source-crop/resize choices within the same bounded north-polar-chart family. Score is mean source local-darkness under Vumarii ink minus mean darkness off ink.",
    "warning": "The source was visually identified before this bounded measurement and the crop family was tuned after inspection. These values support a source attribution; they are not a blind-match p-value.",
    "search_case_count_per_orientation": 500,
    "orientations": {
      "original": {
        "best_source_crop_xyxy_exclusive": [
          200,
          280,
          1760,
          1560
        ],
        "best": {
          "foreground_local_darkness": 9.494679935263937,
          "background_local_darkness": 6.301151369508932,
          "contrast": 3.193528565755005
        },
        "mean_contrast": 1.1945269290508704,
        "standard_deviation_contrast": 0.51998729268151,
        "best_rank": 1
      },
      "horizontal_mirror": {
        "best_source_crop_xyxy_exclusive": [
          200,
          280,
          1680,
          1520
        ],
        "best": {
          "foreground_local_darkness": 8.897902964773941,
          "background_local_darkness": 6.324974746873912,
          "contrast": 2.572928217900029
        },
        "mean_contrast": 0.734549590751295,
        "standard_deviation_contrast": 0.5058324791586211,
        "best_rank": 1
      },
      "vertical_mirror": {
        "best_source_crop_xyxy_exclusive": [
          200,
          280,
          1720,
          1440
        ],
        "best": {
          "foreground_local_darkness": 8.631176612375606,
          "background_local_darkness": 6.319906817586991,
          "contrast": 2.3112697947886156
        },
        "mean_contrast": 1.020339371898896,
        "standard_deviation_contrast": 0.443785551811468,
        "best_rank": 1
      },
      "rotate_180": {
        "best_source_crop_xyxy_exclusive": [
          200,
          360,
          1640,
          1560
        ],
        "best": {
          "foreground_local_darkness": 8.583313246789022,
          "background_local_darkness": 6.567121403186977,
          "contrast": 2.0161918436020443
        },
        "mean_contrast": 0.5525181804526955,
        "standard_deviation_contrast": 0.5336918512612806,
        "best_rank": 1
      }
    }
  },
  "conclusion": "The shared graph layout and original-orientation preference support a strong visual attribution to the Dunhuang north-polar chart detail. The result identifies the image reference only and does not select a text cipher, star traversal, or authorial instruction.",
  "limits": [
    "The source was discovered visually before crop fitting; the metric is supporting evidence, not an unbiased p-value.",
    "The cleaned target omits historic labels and colour coding, so this audit does not identify every individual star or asterism.",
    "No source ties the historical chart to an extraction rule, Vumarii plaintext, or Page 23."
  ]
}