{
  "schema": "silktrain-pilot-sample/v1",
  "synthetic": true,
  "locale": "zh-hans",
  "workflow": "video-tracking",
  "service": "data-documents",
  "title": "视频标注与目标跟踪",
  "source_scenario": "物体被遮挡，两帧后重新出现。",
  "expected_delivery": "帧区间、跨帧目标编号、可见性标记及事件标签。",
  "acceptance_check": "回放关键帧，核查遮挡前后和场景切换时的编号是否连续。",
  "scoping_checklist": "准备有代表性的样本、类别定义、边界情况以及标明单位或坐标的导出结构。",
  "examples": [
    {
      "frame": 118,
      "time_ms": 4720,
      "track": 7,
      "visibility": "visible",
      "center_px": [
        50,
        31
      ]
    },
    {
      "frame": 119,
      "time_ms": 4760,
      "track": 7,
      "visibility": "occluded",
      "center_px": null
    },
    {
      "frame": 120,
      "time_ms": 4800,
      "track": 7,
      "visibility": "visible",
      "center_px": [
        55,
        32
      ]
    }
  ]
}