{
  "scope": "Actual Chrome full-resolution TIFF from conservative manual mask. Same 113 fixed upper-sky 64x64 patches and 476 candidate bright isolated star coordinates from the previous audit, refitted with unchanged Gaussian fitter. These samples assess only upper1700 rows, not all stars or foreground. Reference is a noisy single exposure, not ground truth. Robust detrended patch MAD is a noise proxy, not calibrated sensor SNR. No per-output adjustment, sharpening or denoising. Branch-region safety is separately established with exact RGB16 equality below y=2350. The canopy and lower sky are retained unchanged, not denoised or automatically segmented.",
  "summaries": {
    "reference": {
      "stars": 476,
      "fixedInputStars": 476,
      "rejectedStars": 0,
      "medianFwhm": 2.8974386196570165,
      "medianPairedRatioToReference": 1.0,
      "robustDetrendedPatchNoiseMedian": 0.01705856705735672,
      "patches": 113
    },
    "repaired": {
      "stars": 476,
      "fixedInputStars": 476,
      "rejectedStars": 0,
      "medianFwhm": 2.9877240415137365,
      "medianPairedRatioToReference": 1.03199670577306,
      "robustDetrendedPatchNoiseMedian": 0.007546997361841987,
      "patches": 113,
      "pairedFwhmRatioPercentiles": {
        "p05": 0.9406346023112165,
        "p25": 0.9958656141694114,
        "p50": 1.03199670577306,
        "p75": 1.0722928081656353,
        "p95": 1.1538244189382196,
        "max": 1.253087918020588
      },
      "starsWiderThanReferenceBy15Percent": 26,
      "starsWiderThanReferenceBy25Percent": 1
    }
  },
  "noiseProxyReductionFraction": 0.5575831582766355,
  "fixedSampleSource": "artifacts/quality-audit-20261012/browser-fullres-measurements.json",
  "fixedSampleSourceSha256": "6355f23e2e62085fa002d266ec9662646cfb75f877832184846c6a46d14de1b6",
  "protectedForeground": {
    "firstProtectedRow": 2350,
    "differentSamples": 0,
    "sampleCount": 29803224
  },
  "originalFailureROIs": [
    {
      "id": "noise",
      "box": [
        750,
        650,
        360,
        240
      ],
      "oldDifferentRGB16Samples": 259172,
      "repairedDifferentRGB16Samples": 259177,
      "repairedDisplayDifferenceMean": 16.4646875,
      "referenceSha256": "436b9f66d79b11bc441706e1cf44ba9e7fd521ce050749825526e6ce06c08c2c",
      "repairedSha256": "415f0328c1b33fc2017cad536631edd05dd0d786d21dc02dfd46a1d8f566ffde"
    },
    {
      "id": "stars",
      "box": [
        2440,
        210,
        360,
        240
      ],
      "oldDifferentRGB16Samples": 259152,
      "repairedDifferentRGB16Samples": 259150,
      "repairedDisplayDifferenceMean": 17.090976080246914,
      "referenceSha256": "294922cc18fae36eae6106e1f361e03ae1890c42d1976171bc8699f59cb134bd",
      "repairedSha256": "ed60e78c44fbd8602f80c7139d8a4cb29c81887daf5301b26700869b31b6fddd"
    },
    {
      "id": "boundary",
      "box": [
        2400,
        2600,
        360,
        240
      ],
      "oldDifferentRGB16Samples": 71556,
      "repairedDifferentRGB16Samples": 0,
      "repairedDisplayDifferenceMean": 0.0,
      "referenceSha256": "89d5ea0b5a2fbb73fef0bbfa584268054e2982583f846735183539b13527cc53",
      "repairedSha256": "89d5ea0b5a2fbb73fef0bbfa584268054e2982583f846735183539b13527cc53"
    }
  ],
  "nineRegionChecks": [
    {
      "id": "01-noise",
      "box": [
        750,
        650,
        360,
        240
      ],
      "differentRGB16Samples": 259177,
      "bitExactReference": false
    },
    {
      "id": "02-stars",
      "box": [
        2440,
        210,
        360,
        240
      ],
      "differentRGB16Samples": 259150,
      "bitExactReference": false
    },
    {
      "id": "03-boundary",
      "box": [
        2400,
        2600,
        360,
        240
      ],
      "differentRGB16Samples": 0,
      "bitExactReference": true
    },
    {
      "id": "04-top-left",
      "box": [
        0,
        0,
        360,
        240
      ],
      "differentRGB16Samples": 259175,
      "bitExactReference": false
    },
    {
      "id": "05-top-right",
      "box": [
        3116,
        0,
        360,
        240
      ],
      "differentRGB16Samples": 254974,
      "bitExactReference": false
    },
    {
      "id": "06-center",
      "box": [
        1558,
        2484,
        360,
        240
      ],
      "differentRGB16Samples": 0,
      "bitExactReference": true
    },
    {
      "id": "07-left-tree-tips",
      "box": [
        200,
        2500,
        360,
        240
      ],
      "differentRGB16Samples": 0,
      "bitExactReference": true
    },
    {
      "id": "08-tree-top",
      "box": [
        1800,
        2400,
        360,
        240
      ],
      "differentRGB16Samples": 0,
      "bitExactReference": true
    },
    {
      "id": "09-small-tree-mid",
      "box": [
        900,
        3000,
        360,
        240
      ],
      "differentRGB16Samples": 0,
      "bitExactReference": true
    }
  ]
}