{
  "test_date": "2026-10-21",
  "scope": "Original synthetic classic TIFFs; actual browser downloads in one Chromium browser. Seven valid inputs, nine PNGs. No competitor conversion, external TIFF editor or color-managed application test. Raw strips only in the public generated set. PNG output uses 8-bit RGBA; not an archival precision guarantee.",
  "inputs": [
    {
      "name": "alpha-bands.tiff",
      "bytes": 24742,
      "sha256": "4e18c94979df48fae7c09c338f21356eb72dd3791257b7d5d6f375308039cdb6"
    },
    {
      "name": "bigtiff.tiff",
      "bytes": 24,
      "sha256": "ad2acf792ad56a264d3c5514652c74d6eaa4e49ed6cd4888a6e238dddefab122"
    },
    {
      "name": "gray16.tiff",
      "bytes": 16530,
      "sha256": "f71be63c953f7edf2786d246d13e418e15ae1c78e37ba3dba600b1b65d60e471"
    },
    {
      "name": "no-pages.tiff",
      "bytes": 8,
      "sha256": "1ce397a187d135876fec3bfb2adeed0a66a8cc8c1ad76d36e6f0ab834f320fc6"
    },
    {
      "name": "not-tiff.tiff",
      "bytes": 33,
      "sha256": "2c374a37b4dc372f798ba78eb018d79bbf41638834b45e4d06f3bcd2f349cb31"
    },
    {
      "name": "orientation-1.tiff",
      "bytes": 18584,
      "sha256": "7e62f6d59b83d8101a3f47875f386d4806c26d1a3564dc76ffab07d779051a4c"
    },
    {
      "name": "orientation-6.tiff",
      "bytes": 18584,
      "sha256": "8253f37becb35ed43a55b7bbdee9f2cdceb39a089c74700f2eab37d3ffe99ad5"
    },
    {
      "name": "orientation-8.tiff",
      "bytes": 18584,
      "sha256": "df18701ff1444d62922a0a071fa594cb3c9e275a571e17e32ce4066626a15e10"
    },
    {
      "name": "painted-white.tiff",
      "bytes": 18584,
      "sha256": "3e8d39312b26ac06a7ba4baed82fdecfeb1255e0de2721274b660ea5835e6089"
    },
    {
      "name": "three-pages.tiff",
      "bytes": 39371,
      "sha256": "bba89b99b697d5d32860c5de752f95e58f64f4a9ebd380a91ab9e3964235f95b"
    },
    {
      "name": "truncated-strip.tiff",
      "bytes": 17584,
      "sha256": "39be28f6418713522bd84e5513078c28ab55ef073b1a523f909f65092fe5064a"
    },
    {
      "name": "twenty-one-pages.tiff",
      "bytes": 7064,
      "sha256": "b134040173cfc1acf8cf8b3b5ede542666881d5ff001e3994ce5bcec1b33985a"
    }
  ],
  "successful_inputs": [
    {
      "id": "orientation-1",
      "input_bytes": 18584,
      "input_sha256": "7e62f6d59b83d8101a3f47875f386d4806c26d1a3564dc76ffab07d779051a4c",
      "input_dimensions": "96 × 64",
      "outputs": [
        {
          "phase": "updated",
          "id": "orientation-1",
          "name": "updated-orientation-1.png",
          "width": 96,
          "height": 64,
          "bytes": 407,
          "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed",
          "corner_rgba": [
            18,
            157,
            153,
            255
          ],
          "matches_independent_pillow_orientation": true,
          "download": "orientation-1.png"
        }
      ]
    },
    {
      "id": "orientation-6",
      "input_bytes": 18584,
      "input_sha256": "8253f37becb35ed43a55b7bbdee9f2cdceb39a089c74700f2eab37d3ffe99ad5",
      "input_dimensions": "96 × 64 stored",
      "outputs": [
        {
          "phase": "updated",
          "id": "orientation-6",
          "name": "updated-orientation-6.png",
          "width": 64,
          "height": 96,
          "bytes": 413,
          "sha256": "699c596e82db3a09813dc41f6f00b8f3864cfe0fc3fb9d0386cc8442c847955e",
          "corner_rgba": [
            55,
            78,
            122,
            255
          ],
          "matches_independent_pillow_orientation": true,
          "download": "orientation-6.png"
        }
      ]
    },
    {
      "id": "orientation-8",
      "input_bytes": 18584,
      "input_sha256": "df18701ff1444d62922a0a071fa594cb3c9e275a571e17e32ce4066626a15e10",
      "input_dimensions": "96 × 64 stored",
      "outputs": [
        {
          "phase": "updated",
          "id": "orientation-8",
          "name": "updated-orientation-8.png",
          "width": 64,
          "height": 96,
          "bytes": 412,
          "sha256": "f85ae75d5f823bdda5a62c565711024501bfa40824d6f80a10100778b725c316",
          "corner_rgba": [
            249,
            179,
            126,
            255
          ],
          "matches_independent_pillow_orientation": true,
          "download": "orientation-8.png"
        }
      ]
    },
    {
      "id": "three-pages",
      "input_bytes": 39371,
      "input_sha256": "bba89b99b697d5d32860c5de752f95e58f64f4a9ebd380a91ab9e3964235f95b",
      "input_dimensions": "96 × 64 / 73 × 41 / 48 × 80",
      "outputs": [
        {
          "phase": "updated",
          "id": "three-pages",
          "member": "page-01.png",
          "name": "updated-page-01.png",
          "width": 96,
          "height": 64,
          "bytes": 407,
          "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed",
          "download": "page-01.png"
        },
        {
          "phase": "updated",
          "id": "three-pages",
          "member": "page-02.png",
          "name": "updated-page-02.png",
          "width": 73,
          "height": 41,
          "bytes": 304,
          "sha256": "c17b7ebebbb991ab6e6920b5524798e8b06a6f41c07ce689ddc08b2ba9a9c738",
          "download": "page-02.png"
        },
        {
          "phase": "updated",
          "id": "three-pages",
          "member": "page-03.png",
          "name": "updated-page-03.png",
          "width": 48,
          "height": 80,
          "bytes": 344,
          "sha256": "bb8c5362a60b3a3bae4666ab638d1046d0a23ae35bc8f7b1d52505cbaf73671b",
          "download": "page-03.png"
        }
      ]
    },
    {
      "id": "gray16",
      "input_bytes": 16530,
      "input_sha256": "f71be63c953f7edf2786d246d13e418e15ae1c78e37ba3dba600b1b65d60e471",
      "input_dimensions": "256 × 32",
      "outputs": [
        {
          "phase": "updated",
          "id": "gray16",
          "name": "updated-gray16.png",
          "width": 256,
          "height": 32,
          "bytes": 1349,
          "sha256": "7f33562e458042ff4aaaeee39e9086ee9981e96421c4115c23aab38307beac2a",
          "corner_rgba": [
            46,
            46,
            46,
            255
          ],
          "upper_row_unique_gray": 2,
          "lower_row_unique_gray": 256,
          "upper_first_last": [
            46,
            47
          ],
          "png_bit_depth": 8,
          "download": "gray16.png"
        }
      ]
    },
    {
      "id": "alpha-bands",
      "input_bytes": 24742,
      "input_sha256": "4e18c94979df48fae7c09c338f21356eb72dd3791257b7d5d6f375308039cdb6",
      "input_dimensions": "128 × 48",
      "outputs": [
        {
          "phase": "updated",
          "id": "alpha-bands",
          "name": "updated-alpha-bands.png",
          "width": 128,
          "height": 48,
          "bytes": 387,
          "sha256": "21b5cfbecf97d006b6f18b14f9af8f3cdcb150006404eb1d0f0666e0bb95f6c5",
          "corner_rgba": [
            0,
            0,
            0,
            0
          ],
          "band_rgba": [
            [
              0,
              0,
              0,
              0
            ],
            [
              20,
              155,
              151,
              64
            ],
            [
              18,
              157,
              153,
              128
            ],
            [
              18,
              157,
              153,
              255
            ]
          ],
          "download": "alpha-bands.png"
        }
      ]
    },
    {
      "id": "painted-white",
      "input_bytes": 18584,
      "input_sha256": "3e8d39312b26ac06a7ba4baed82fdecfeb1255e0de2721274b660ea5835e6089",
      "input_dimensions": "128 × 48",
      "outputs": [
        {
          "phase": "updated",
          "id": "painted-white",
          "name": "updated-painted-white.png",
          "width": 128,
          "height": 48,
          "bytes": 400,
          "sha256": "5ec9465d3b5f2ebfbb932e7c08ae71ef52ae34d626d7e30238a1a1cfe70e0c66",
          "corner_rgba": [
            255,
            255,
            255,
            255
          ],
          "download": "painted-white.png"
        }
      ]
    }
  ],
  "errors": [
    "truncated-strip",
    "twenty-one-pages",
    "no-pages",
    "bigtiff",
    "not-tiff"
  ],
  "measurements": {
    "date": "2026-10-21",
    "measurements": [
      {
        "phase": "baseline",
        "id": "alpha-bands",
        "name": "baseline-alpha-bands.png",
        "width": 128,
        "height": 48,
        "bytes": 387,
        "sha256": "21b5cfbecf97d006b6f18b14f9af8f3cdcb150006404eb1d0f0666e0bb95f6c5",
        "corner_rgba": [
          0,
          0,
          0,
          0
        ],
        "band_rgba": [
          [
            0,
            0,
            0,
            0
          ],
          [
            20,
            155,
            151,
            64
          ],
          [
            18,
            157,
            153,
            128
          ],
          [
            18,
            157,
            153,
            255
          ]
        ]
      },
      {
        "phase": "baseline",
        "id": "gray16",
        "name": "baseline-gray16.png",
        "width": 256,
        "height": 32,
        "bytes": 1349,
        "sha256": "7f33562e458042ff4aaaeee39e9086ee9981e96421c4115c23aab38307beac2a",
        "corner_rgba": [
          46,
          46,
          46,
          255
        ],
        "upper_row_unique_gray": 2,
        "lower_row_unique_gray": 256,
        "upper_first_last": [
          46,
          47
        ],
        "png_bit_depth": 8
      },
      {
        "phase": "baseline",
        "id": "orientation-1",
        "name": "baseline-orientation-1.png",
        "width": 96,
        "height": 64,
        "bytes": 407,
        "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed",
        "corner_rgba": [
          18,
          157,
          153,
          255
        ]
      },
      {
        "phase": "baseline",
        "id": "orientation-6",
        "name": "baseline-orientation-6.png",
        "width": 96,
        "height": 64,
        "bytes": 407,
        "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed",
        "corner_rgba": [
          18,
          157,
          153,
          255
        ]
      },
      {
        "phase": "baseline",
        "id": "orientation-8",
        "name": "baseline-orientation-8.png",
        "width": 96,
        "height": 64,
        "bytes": 407,
        "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed",
        "corner_rgba": [
          18,
          157,
          153,
          255
        ]
      },
      {
        "phase": "baseline",
        "id": "painted-white",
        "name": "baseline-painted-white.png",
        "width": 128,
        "height": 48,
        "bytes": 400,
        "sha256": "5ec9465d3b5f2ebfbb932e7c08ae71ef52ae34d626d7e30238a1a1cfe70e0c66",
        "corner_rgba": [
          255,
          255,
          255,
          255
        ]
      },
      {
        "phase": "baseline",
        "id": "truncated-strip",
        "name": "baseline-truncated-strip.png",
        "width": 96,
        "height": 64,
        "bytes": 436,
        "sha256": "2a1b8b4a50a92d9e49bc2222ebedfd3f55e508a967565682d9cd5eb37df33dfe",
        "corner_rgba": [
          18,
          157,
          153,
          255
        ]
      },
      {
        "phase": "baseline",
        "id": "three-pages",
        "member": "page-01.png",
        "name": "baseline-page-01.png",
        "width": 96,
        "height": 64,
        "bytes": 407,
        "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed"
      },
      {
        "phase": "baseline",
        "id": "three-pages",
        "member": "page-02.png",
        "name": "baseline-page-02.png",
        "width": 73,
        "height": 41,
        "bytes": 304,
        "sha256": "c17b7ebebbb991ab6e6920b5524798e8b06a6f41c07ce689ddc08b2ba9a9c738"
      },
      {
        "phase": "baseline",
        "id": "three-pages",
        "member": "page-03.png",
        "name": "baseline-page-03.png",
        "width": 48,
        "height": 80,
        "bytes": 344,
        "sha256": "bb8c5362a60b3a3bae4666ab638d1046d0a23ae35bc8f7b1d52505cbaf73671b"
      },
      {
        "phase": "updated",
        "id": "alpha-bands",
        "name": "updated-alpha-bands.png",
        "width": 128,
        "height": 48,
        "bytes": 387,
        "sha256": "21b5cfbecf97d006b6f18b14f9af8f3cdcb150006404eb1d0f0666e0bb95f6c5",
        "corner_rgba": [
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        ],
        "band_rgba": [
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            0,
            0,
            0
          ],
          [
            20,
            155,
            151,
            64
          ],
          [
            18,
            157,
            153,
            128
          ],
          [
            18,
            157,
            153,
            255
          ]
        ]
      },
      {
        "phase": "updated",
        "id": "gray16",
        "name": "updated-gray16.png",
        "width": 256,
        "height": 32,
        "bytes": 1349,
        "sha256": "7f33562e458042ff4aaaeee39e9086ee9981e96421c4115c23aab38307beac2a",
        "corner_rgba": [
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          46,
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        ],
        "upper_row_unique_gray": 2,
        "lower_row_unique_gray": 256,
        "upper_first_last": [
          46,
          47
        ],
        "png_bit_depth": 8
      },
      {
        "phase": "updated",
        "id": "orientation-1",
        "name": "updated-orientation-1.png",
        "width": 96,
        "height": 64,
        "bytes": 407,
        "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed",
        "corner_rgba": [
          18,
          157,
          153,
          255
        ],
        "matches_independent_pillow_orientation": true
      },
      {
        "phase": "updated",
        "id": "orientation-6",
        "name": "updated-orientation-6.png",
        "width": 64,
        "height": 96,
        "bytes": 413,
        "sha256": "699c596e82db3a09813dc41f6f00b8f3864cfe0fc3fb9d0386cc8442c847955e",
        "corner_rgba": [
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        ],
        "matches_independent_pillow_orientation": true
      },
      {
        "phase": "updated",
        "id": "orientation-8",
        "name": "updated-orientation-8.png",
        "width": 64,
        "height": 96,
        "bytes": 412,
        "sha256": "f85ae75d5f823bdda5a62c565711024501bfa40824d6f80a10100778b725c316",
        "corner_rgba": [
          249,
          179,
          126,
          255
        ],
        "matches_independent_pillow_orientation": true
      },
      {
        "phase": "updated",
        "id": "painted-white",
        "name": "updated-painted-white.png",
        "width": 128,
        "height": 48,
        "bytes": 400,
        "sha256": "5ec9465d3b5f2ebfbb932e7c08ae71ef52ae34d626d7e30238a1a1cfe70e0c66",
        "corner_rgba": [
          255,
          255,
          255,
          255
        ]
      },
      {
        "phase": "updated",
        "id": "three-pages",
        "member": "page-01.png",
        "name": "updated-page-01.png",
        "width": 96,
        "height": 64,
        "bytes": 407,
        "sha256": "9d8b442903c6f4e1a00304a3be833b17ae91fda7c037087642da6e00bfb19eed"
      },
      {
        "phase": "updated",
        "id": "three-pages",
        "member": "page-02.png",
        "name": "updated-page-02.png",
        "width": 73,
        "height": 41,
        "bytes": 304,
        "sha256": "c17b7ebebbb991ab6e6920b5524798e8b06a6f41c07ce689ddc08b2ba9a9c738"
      },
      {
        "phase": "updated",
        "id": "three-pages",
        "member": "page-03.png",
        "name": "updated-page-03.png",
        "width": 48,
        "height": 80,
        "bytes": 344,
        "sha256": "bb8c5362a60b3a3bae4666ab638d1046d0a23ae35bc8f7b1d52505cbaf73671b"
      }
    ],
    "new_old_comparison": [
      {
        "id": "alpha-bands",
        "same_bytes": true
      },
      {
        "id": "gray16",
        "same_bytes": true
      },
      {
        "id": "orientation-1",
        "same_bytes": true
      },
      {
        "id": "orientation-6",
        "same_bytes": false
      },
      {
        "id": "orientation-8",
        "same_bytes": false
      },
      {
        "id": "painted-white",
        "same_bytes": true
      },
      {
        "id": "three-pages/page-01.png",
        "same_bytes": true
      },
      {
        "id": "three-pages/page-02.png",
        "same_bytes": true
      },
      {
        "id": "three-pages/page-03.png",
        "same_bytes": true
      }
    ],
    "unchanged_pngs": 7,
    "changed_pngs": 2
  },
  "zip": {
    "name": "three-pages.zip",
    "bytes": 1261,
    "sha256": "57f2d27dc4f52b9df42a01e7f3c1e9bffef3b4cf64e490df46c87c14e8c80aec"
  }
}