{
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  "task_focus": "world coordinate mapping",
  "source_json": "/data/home_dir/wangpeizhi/v1-TSC/tir-0416/tir_trans_0416/json_out_pipei_v1225_addspeed/HHL_QHDD_HHL_QHDD_E_1766018607828.json",
  "source_json_name": "HHL_QHDD_HHL_QHDD_E_1766018607828.json",
  "timestamp": 1766018607.8289979,
  "vehicle_count": 2,
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}