{
  "capturedAt": "2026-10-22T03:11:06.456Z",
  "method": "自制 SVG 栅格化；Lanczos3 缩小与普通放大；另用精确 2×2 均值构造歧义反例。不是 Gemini 输出。",
  "input": {
    "dimensions": [
      300,
      200
    ],
    "sha256": "b758200c654488abc7fcf521f74f368e17518fc28c685f909048f86189f0f214"
  },
  "groundTruth": {
    "batch": "H7Q4-M2",
    "item": "0138",
    "weight": "37 g",
    "smallPrint": "Q0O1-I8B5",
    "fineLines": "1 px lines / 1 px gaps"
  },
  "ambiguity": {
    "originalsDifferent": true,
    "reducedPixelsIdentical": true,
    "reducedValue": 127,
    "sha256A": "f0303914dce75ee1b699a7d91f1e7aa8c64a443a1b12fd656663d723093fe4d6",
    "sha256B": "f0303914dce75ee1b699a7d91f1e7aa8c64a443a1b12fd656663d723093fe4d6"
  },
  "comparisons": [
    {
      "name": "quality-original.png",
      "title": "原始图 / 1200 × 800",
      "note": "已知原文与线条，作为核对基准。"
    },
    {
      "name": "quality-input-300.png",
      "title": "低清输入 / 300 × 200",
      "note": "缩小后细线和小字信息已丢失。"
    },
    {
      "name": "quality-upscaled-1200.png",
      "title": "普通放大 / 1200 × 800",
      "note": "像素恢复到原尺寸，不等于细节恢复。"
    }
  ],
  "limitation": "自制图只用于展示采样损失和核验方法，不能代表 Gemini 的真实照片表现、成功率或版本能力。"
}