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          "label": "IoU=(100-d)/(100+d)",
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      ],
      "xlabel": "Horizontal displacement (pixels)",
      "ylabel": "IoU",
      "logx": false,
      "logy": false
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  ],
  "title": "Even a simple geometric shift changes IoU nonlinearly",
  "assumptions": "Identical rectangles width100,height60, horizontal shift0..40, vertical alignment exact. No SAM inference.",
  "worked": "水平移动10像素时IoU=90/110≈0.818；移动25像素时为75/125=0.6。复杂边界与标注歧义不能由这个矩形模型完全描述。",
  "source_ids": [
    "arxiv-2304.02643",
    "arxiv-2408.00714",
    "clip"
  ],
  "formula_source": "Article equations and this versioned script",
  "diagram_nodes": [
    "图像 / 视频与对象定义",
    "提示预算及坐标变换",
    "图像编码 / 视频记忆",
    "多掩码及质量预测",
    "候选选择与人工纠错",
    "边界、身份及交互成本"
  ]
}