{
  "schema": "isgenai.image-density-examples.v1",
  "created": "2026-09-27",
  "generation": "node scripts/generate-image-density-examples.mjs",
  "generatorVersions": {
    "sharp": "0.35.4",
    "vips": "8.18.6"
  },
  "width": 1200,
  "height": 900,
  "scope": "Software-drawn controlled parser fixtures. No camera, subject, origin-classification or print-quality evidence. The physical PNG record stores integer pixels/metre; nominal 300 PPI is 299.9994 after conversion. Sharp density is interpreted and may be rounded or defaulted when no record exists; it is not a raw-field report.",
  "license": "CC0-1.0 for these original generated pixel patterns and fixtures",
  "files": [
    {
      "file": "controlled-300ppi.png",
      "bytes": 133444,
      "physicalPixelsPerMetre": {
        "x": 11811,
        "y": 11811
      },
      "expectedPpi": 299.9994,
      "sha256": "f5896b4a75447e55238727b04f0cd35d6d99bde3b7c6f64c11e33284c07af3bb",
      "decodedRgbSha256": "a60a89e50cb7d029bc2493e2c4896655ff61fb50842beaba08d19b24626f01c5",
      "independentSharp": {
        "width": 1200,
        "height": 900,
        "density": 300
      }
    },
    {
      "file": "controlled-unitless.png",
      "bytes": 133444,
      "unitlessRatio": {
        "x": 1,
        "y": 1
      },
      "expectedPpi": null,
      "sha256": "42cd17416b30258bcbc5e8f8b68a230776027de1ec0e44486991c095800b4b98",
      "decodedRgbSha256": "a60a89e50cb7d029bc2493e2c4896655ff61fb50842beaba08d19b24626f01c5",
      "independentSharp": {
        "width": 1200,
        "height": 900,
        "density": null
      }
    },
    {
      "file": "controlled-no-density.png",
      "bytes": 133423,
      "expectedPpi": null,
      "sha256": "335a631c47de4de0296d9c814237a7cfcd99cc019005f605bd336de78dbfa091",
      "decodedRgbSha256": "a60a89e50cb7d029bc2493e2c4896655ff61fb50842beaba08d19b24626f01c5",
      "independentSharp": {
        "width": 1200,
        "height": 900,
        "density": 72
      }
    }
  ]
}