Object detection example

[robmarkcole]

If someone could validate, I will make a PR to add it

{
  "stac_version": "1.0.0",
  "stac_extensions": [
    "https://stac-extensions.github.io/label/v1.0.1/schema.json"
  ],
  "id": "vehicle_detection_example_001",
  "type": "Feature",
  "bbox": [
    -122.4194,
    37.7749,
    -122.4094,
    37.7849
  ],
  "geometry": {
    "type": "Polygon",
    "coordinates": [
      [
        [
          -122.4194,
          37.7749
        ],
        [
          -122.4194,
          37.7849
        ],
        [
          -122.4094,
          37.7849
        ],
        [
          -122.4094,
          37.7749
        ],
        [
          -122.4194,
          37.7749
        ]
      ]
    ]
  },
  "assets": {
    "labels": {
      "title": "Vehicle Detection Labels",
      "href": "vehicle_detection_labels.geojson",
      "type": "application/geo+json",
      "roles": [
        "labels",
        "labels-vector"
      ]
    },
    "source_image": {
      "title": "Source RGB Imagery",
      "href": "aerial_image_001.tif",
      "type": "image/tiff",
      "roles": [
        "data"
      ]
    }
  },
  "properties": {
    "datetime": "2024-03-15T14:30:00Z",
    "license": "CC-BY-4.0",
    "label:properties": [
      "vehicle_type",
      "confidence",
      "vehicle_make",
      "vehicle_color",
      "occlusion_level"
    ],
    "label:description": "Vehicle detection labels for aerial imagery containing cars, trucks, and buses with bounding boxes, including vehicle make, color, and occlusion metadata",
    "label:tasks": [
      "detection"
    ],
    "label:type": "vector",
    "label:methods": [
      "manual"
    ],
    "label:classes": [
      {
        "name": "vehicle_type",
        "classes": [
          "car",
          "truck",
          "bus",
          "motorcycle"
        ]
      },
      {
        "name": "confidence",
        "classes": [
          "high",
          "medium",
          "low"
        ]
      },
      {
        "name": "vehicle_make",
        "classes": [
          "Toyota",
          "Ford",
          "BMW",
          "Unknown"
        ]
      },
      {
        "name": "vehicle_color",
        "classes": [
          "white",
          "black",
          "red",
          "other"
        ]
      },
      {
        "name": "occlusion_level",
        "classes": [
          "none",
          "partial",
          "heavy"
        ]
      }
    ],
    "label:overviews": [
      {
        "property_key": "vehicle_type",
        "counts": [
          {
            "name": "car",
            "count": 55
          },
          {
            "name": "truck",
            "count": 10
          },
          {
            "name": "bus",
            "count": 2
          },
          {
            "name": "motorcycle",
            "count": 1
          }
        ]
      },
      {
        "property_key": "confidence",
        "counts": [
          {
            "name": "high",
            "count": 58
          },
          {
            "name": "medium",
            "count": 8
          },
          {
            "name": "low",
            "count": 2
          }
        ]
      },
      {
        "property_key": "vehicle_make",
        "counts": [
          {
            "name": "Toyota",
            "count": 25
          },
          {
            "name": "Ford",
            "count": 18
          },
          {
            "name": "BMW",
            "count": 15
          },
          {
            "name": "Unknown",
            "count": 10
          }
        ]
      },
      {
        "property_key": "vehicle_color",
        "counts": [
          {
            "name": "white",
            "count": 28
          },
          {
            "name": "black",
            "count": 22
          },
          {
            "name": "red",
            "count": 12
          },
          {
            "name": "other",
            "count": 6
          }
        ]
      },
      {
        "property_key": "occlusion_level",
        "counts": [
          {
            "name": "none",
            "count": 50
          },
          {
            "name": "partial",
            "count": 16
          },
          {
            "name": "heavy",
            "count": 2
          }
        ]
      }
    ]
  },
  "links": [
    {
      "rel": "self",
      "href": "./object_detection_example.json"
    },
    {
      "rel": "source",
      "href": "https://example.com/source/aerial_image_001.tif",
      "title": "Source aerial imagery used for vehicle detection labeling",
      "label:assets": [
        "rgb"
      ]
    }
  ]
}