{
  "date": "2026-10-24",
  "width": 512,
  "height": 256,
  "provenance": "Original authored grayscale byte chart not photographed or generated by a model",
  "panels": [
    "Sharp step 20 to 235",
    "Same step with eight passes of clamped one dimensional binomial 1 4 6 4 1 over sixteen and rounding after each pass",
    "Sharp step 120 to 136"
  ],
  "score": "RGB byte weighted gray then Sobel L1 divided by eight half up rounded clamped to 255 with outer border zero",
  "color": "#ff435a",
  "cases": [
    {
      "threshold": 12,
      "markedPixels": 4064,
      "regions": [
        {
          "name": "Sharp high contrast",
          "left": 8,
          "right": 152,
          "top": 8,
          "bottom": 248,
          "markedPixels": 480
        },
        {
          "name": "Blurred high contrast",
          "left": 184,
          "right": 328,
          "top": 8,
          "bottom": 248,
          "markedPixels": 1920
        },
        {
          "name": "Sharp low contrast",
          "left": 360,
          "right": 504,
          "top": 8,
          "bottom": 248,
          "markedPixels": 0
        }
      ]
    },
    {
      "threshold": 40,
      "markedPixels": 2032,
      "regions": [
        {
          "name": "Sharp high contrast",
          "left": 8,
          "right": 152,
          "top": 8,
          "bottom": 248,
          "markedPixels": 480
        },
        {
          "name": "Blurred high contrast",
          "left": 184,
          "right": 328,
          "top": 8,
          "bottom": 248,
          "markedPixels": 0
        },
        {
          "name": "Sharp low contrast",
          "left": 360,
          "right": 504,
          "top": 8,
          "bottom": 248,
          "markedPixels": 0
        }
      ]
    }
  ],
  "scope": "Interior regional counts exclude panel boundaries and do not certify focus",
  "reproduction": "Run this builder with Bun Sharp 0.34.5 and Biome 2.2.2 beside focus-peaking.ts and duotone.ts"
}