{
  "experiment_date": "2026-10-05",
  "timezone": "Asia/Shanghai",
  "editor": "macOS Preview 11.0",
  "os": "macOS 27.0.1",
  "method": {
    "source": "Original Photopea illustration exported as 1280x720 PNG with 100 PPI metadata",
    "reset": "Each Preview branch duplicated the same baseline independently",
    "off": {
      "resample": false,
      "resolution_input_ppi": 300,
      "displayed_inches": [
        4.27,
        2.4
      ]
    },
    "on": {
      "resample": true,
      "scale_proportionally": true,
      "resolution_input_ppi": 300,
      "displayed_inches": [
        12.8,
        7.2
      ]
    }
  },
  "verification": {
    "python": "3.12.14",
    "pillow": "12.3.0",
    "pixel_conversion": "RGBA",
    "baseline_off_decoded_pixels_identical": true
  },
  "files": [
    {
      "file": "baseline-100ppi.png",
      "pixels": [
        1280,
        720
      ],
      "bytes": 5668,
      "file_sha256": "d39da95a55d94513fe571ff3891a74309f6020aba936e184f22faa28613d6cc2",
      "stored_ppi": [
        99.9998,
        99.9998
      ],
      "color_mode": "P",
      "decoded_rgba_sha256": "e9f407383a1cd8e630df014427322b23cd590f9f7523d98359bb9c18aba74999"
    },
    {
      "file": "off-300ppi.png",
      "pixels": [
        1280,
        720
      ],
      "bytes": 23323,
      "file_sha256": "9c80073d4060760eaeb736f1017c00c80990bca22fa584045674b75a0335f08d",
      "stored_ppi": [
        299.9994,
        299.9994
      ],
      "color_mode": "RGBA",
      "decoded_rgba_sha256": "e9f407383a1cd8e630df014427322b23cd590f9f7523d98359bb9c18aba74999"
    },
    {
      "file": "on-300ppi.png",
      "pixels": [
        3840,
        2160
      ],
      "bytes": 175811,
      "file_sha256": "5fe95ed25439f7d96105ce9754334b807c7b2a71dd39de058ea470cea0e3f54e",
      "stored_ppi": [
        299.9994,
        299.9994
      ],
      "color_mode": "RGBA",
      "decoded_rgba_sha256": "d34f6dd608564e2e07ba632fcad3c238d857855f7fb62b92b30d8346ebd11dbb"
    }
  ],
  "limits": [
    "One synthetic image and one PNG export per branch",
    "No YouTube upload or server processing tested",
    "Resampling does not recover missing source detail",
    "Encoded byte size is not a sharpness score",
    "Preview screenshot capture unavailable; original accessibility input-state records retained privately"
  ]
}