rectangle

The rectangle parameter is used to specify the coordinates of a BoundingBox object, as follows:

    [{
        "AddImage": {
            "_ref": 1,
            "format": "png",
            "properties": {
                "description": "dog playing in a park"
            }
        }
    }, {
        "AddBoundingBox": {
            "image_ref": 1,
            "label": "Dog",
            "rectangle": {
                "x": 200,
                "y": 100,
                "width": 300,
                "height": 300
            },
            "properties": {
                "label_id": 32
            }
        }
    }]

where x and y are the coordinates of the upper left corner of the BoundingBox and w and h are the width and height.