照片元数据保真验证：样本、校验值与复现方法

下载完整证据包

下载验证资料包 ZIP · 样本清单与源文件校验值 · 完整结果 JSON · 方法与许可说明（英文）

资料包包含源样本、四种操作的输出、原图 ZIP、写入器代码快照和验证脚本。照片都是程序生成的微型色块，作者、相机与坐标为刻意设置的测试值，无真实人物或拍摄地点。

逐样本结果：图像数据与像素前后一致

每个样本执行：修改作者/相机/GPS、仅 GPS、仅 EXIF、全部元数据范围。两列分别比较保留的图像区块字节与解码后的原始像素。展开最后一列可下载对应输出并查看字段前后值。

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Fidelity Edited",
    "make": "Fidelity Camera",
    "latitude": -33.5,
    "longitude": 151.20000000000002
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

{
  "before": {
    "artist": "Synthetic Author",
    "make": "Synthetic Camera",
    "latitude": 46.5,
    "longitude": 11.8
  },
  "after": {
    "artist": null,
    "make": null,
    "latitude": null,
    "longitude": null
  }
}

下载原图 ZIP — 9 个文件均使用 STORE，解包后 SHA-256 与源文件清单一致。原图包含原始测试元数据，不应用修改或清理。

在本机复现，无需购买下载方案

1. 下载并解压完整资料包；安装 Node.js 22.13 或更高版本。
2. 在解压目录执行以下命令。首次安装会下载 sharp 解码依赖；验证本身仅在本机读取资料包，不上传照片。

   npm install
   npm run verify

3. 预期输出为 36 次转换通过，9 个原图条目为 STORE 且字节一致。脚本会重新生成输出，与公开文件逐字节比较，而非只相信结果 JSON。
4. 也可将源样本导入查看器，再将公开输出导入，核对作者与 GPS 字段。工作台的图片下载仍受原有方案规则约束；本页证据文件可直接免费获取。

公开检查使用 sharp 0.35.4 / libvips 8.18.6. 资料包固定 sharp 版本，输出中记录实际解码器版本；不同解码器或平台的像素差异需单独分析。

到底比较了什么？

• JPEG：从第一个 SOS 标记到文件结尾的压缩扫描数据。PNG：图像/动画及选定色彩区块。WebP：压缩图像、透明度、动画与 ICC 区块。经典 TIFF：全部页面的图像条带或图块。
• 使用 sharp 独立于元数据写入器解码，对照原始像素、尺寸、位深、页数和帧延时；16 位样本以 ushort 比较，不降到 8 位。
• 断言作者、相机和 GPS 的预期变化。修改后作者为 Fidelity Edited；仅 GPS 后作者保留、坐标为空；仅 EXIF 与全部范围后这些测试字段为空。
• 写入器快照与 JPEG、原图 ZIP 函数直接取自本次站点代码。脚本校验快照哈希以标记版本；它不是第三方认证。

覆盖范围与限制

这是一组公开、可复现的微型合成测试，不代表所有相机文件。包含有损/无损和动态 WebP、LZW/Deflate TIFF、16 位及多页 TIFF；不覆盖 BigTIFF、所有厂商扩展、异常目录或大文件压力。

本组样本不含旋转方向。校验未执行自动旋转；其他 JPEG、PNG 或 WebP 文件清除方向字段后，显示方向可能变化，即使图像压缩字节没变。TIFF 界面仅预览第一页，导出修改应用全部页面。

仅 GPS 不会清除 XMP/IPTC、文件名或画面中的位置线索。全部范围仍保留解码/色彩所需数据，经典 TIFF 还保留布局和方向字段。本页只断言列出的字段，不提供取证级匿名保证。

给教程作者：如何引用

欢迎引用结果与方法，并附上样本覆盖范围和“产品作者合成测试”的说明。图片样本与其转换副本按 CC0 1.0 公开，可用于教程；代码与第三方库遵循各自许可，见资料包说明。

EXIF Studio. 照片元数据保真验证, v1 (2026-10-30). https://exifdesk.com/zh/fidelity-verification#results

稳定引用锚点: #results · #method · #limits. 发现不一致时，请说明样本、操作、Node/解码器版本并联系 support@exifdesk.com.

打开查看器核对字段 → · 了解清除范围 →