{ "type": "json", "labels": [{ "file_id": "10.pcd", "label_type": "polygon", "sensor_id": "camera_0", "label_category_id": "car", "label_id": "car:5", "polygons": [[[2,3], [5,6], [78, 9]], [[34, 56], [45, 67], [33, 45]]] },{ "file_id": "10.pcd", "label_type": "3d_bbox", "label_category_id": "car", "label_id": "car:5", "three_d_bbox": {"cx": 6.417910191363102, "cy": 37.40165669339892, "cz": -2.026788515715022, "rot_z": -1.4502365175856688, "h": 1.6082608226905268, "l": 4.062483053079639, "w": 1.8871934665515997} }] }