{
  "experiment_date": "2026-11-12",
  "original_sample_date": "2026-11-05",
  "input": {
    "url": "/samples/svg-to-png/2026-11-05/meet.svg",
    "dimensions": [
      200,
      100
    ],
    "viewBox": [
      0,
      0,
      100,
      100
    ],
    "bytes": 140,
    "sha256": "4cfabb2d5375518be25809ddd37f70c19d97999dec7189387c4dc73a4f50c37e"
  },
  "pngs": [
    {
      "url": "/samples/svg-to-png/2026-11-05/meet.png",
      "date": "2026-11-05",
      "provenance": "Original Filepetal download at 200 px width",
      "dimensions": [
        200,
        100
      ],
      "bytes": 2048,
      "sha256": "c3e7b820291ca319373f01ee7bfa33af9d7e5895a02aa3726257290ab2dd957b",
      "pHYs": null,
      "idat_sha256": "ab40d4647341da455aeea9b11c0cbd22ed59ed57ee06a2465185b5ac11b43701",
      "rgba_sha256": "f4e89171536753de2a264cbb369d16ae9f67650bd54f2f20cda7df3a902fe589",
      "chunk_crc_valid": true
    },
    {
      "url": "/samples/svg-to-png/density-2026-11-12/meet-density-300ppi.png",
      "date": "2026-11-12",
      "provenance": "Offline control; inserted one pHYs chunk after IHDR",
      "dimensions": [
        200,
        100
      ],
      "bytes": 2069,
      "sha256": "5295267654868140c32ddefce910e6b2d0ad2673a7c2db224f15b40301097ffb",
      "pHYs": [
        11811,
        11811,
        1
      ],
      "idat_sha256": "ab40d4647341da455aeea9b11c0cbd22ed59ed57ee06a2465185b5ac11b43701",
      "rgba_sha256": "f4e89171536753de2a264cbb369d16ae9f67650bd54f2f20cda7df3a902fe589",
      "chunk_crc_valid": true
    },
    {
      "url": "/samples/svg-to-png/2026-11-05/meet-width400.png",
      "date": "2026-11-05",
      "provenance": "Original Filepetal download at 400 px width",
      "dimensions": [
        400,
        200
      ],
      "bytes": 5051,
      "sha256": "a003b56504c3f9baa72028438755aac44141cf9464d9e189d66b89efb16711f8",
      "pHYs": null,
      "idat_sha256": "fe36959afe5b62cfa3ed2738c28f72cd324910d76dcde6197f1c3a9cdca67f7c",
      "rgba_sha256": "5a0e7e124dd3f33fb6fe7efb1f2401717d0eee4cef1031a9a930ee126434bcff",
      "chunk_crc_valid": true
    }
  ],
  "pixels_per_inch_from_chunk": 299.9994,
  "method": "Insert the big-endian pHYs payload (11811, 11811, metre=1) immediately after IHDR; recompute its CRC-32. Compare IDAT payloads and Pillow-decoded RGBA bytes.",
  "scope": "The tagged PNG is an offline metadata control. No print driver, physical print, or competing converter was tested.",
  "source": "https://www.w3.org/TR/png-3/#11pHYs"
}