{
  "schema": "silktrain-pilot-sample/v1",
  "synthetic": true,
  "locale": "zh-hant",
  "workflow": "video-tracking",
  "service": "data-documents",
  "title": "影片標註與物件追蹤",
  "source_scenario": "物件在障礙物後消失，兩個影格後再次出現。",
  "expected_delivery": "影格區間、持續一致的物件編號、可見性標記及事件標籤。",
  "acceptance_check": "重播轉折影格，核對遮擋前後及場景切換時的編號是否一致。",
  "scoping_checklist": "準備具代表性的樣本、類別定義、邊界情況及標明單位或座標的匯出結構。",
  "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
      ]
    }
  ]
}