Boxes

Given a box entry in params.geometries, Scale will annotate your image or video with boxes and return the position and dimensions of the boxes.

Request Parameters

Parameter	Type	Default	Description
objects_to_annotate	array	[]	A list of `string` or LabelDescription objects.
min_height	integer	0	The minimum height in pixels of the bounding boxes you'd like to be made.
min_width	integer	0	The minimum width in pixels of the bounding boxes you'd like to be made.
can_rotate	boolean	false	Allows a tasker to rotate the bounding box.
integer_pixels	boolean	false	Response fields denoting box location and size (`top`, `left`, `width`, `height`) will be returned as integers instead of floats. This does not work with rotated boxes.

{
  "geometries": {
    "box": {
      "objects_to_annotate": [
        "traffic_sign",
        {
          "choice": "vehicle",
          "subchoices": [
          	"Car",
            {
              "choice": "truck_suv",
              "display": "truck or SUV"
            }
          ]
        },
        "pedestrian"
      ],
      "min_height": 5,
      "min_width": 5,
      "can_rotate": false
    },
    ...
  },
  ...
}

Response Fields

Key	Type	Description
uuid	string	A computer-generated unique identifier for this annotation. In video annotation tasks, this can be used to track the same object across frames.
type	string	String indicating geometry type: `box`
label	string	The label of this annotation, chosen from the `objects_to_annotate` array for its geometry. In video annotation tasks, any annotation objects with the same `uuid` will have the same `label` across all frames.
attributes	object	See the Annotation Attributes section for more details about the `attributes` response field.
left	float	The distance, in pixels, between the left border of the bounding box and the left border of the image.
top	float	The distance, in pixels, between the top border of the bounding box and the top border of the image.
width	float	The width, in pixels, of the bounding box.
height	float	The height, in pixels, of the bounding box.

If can_rotate was set to true, the following fields will supersede the above fields:

Key	Type	Description
rotation	float	The clockwise rotation in radians
vertices	An array of objects with a schema `{x: 0, y: 0}`	The vertices of the rotated bounding box
left	float	The distance, in pixels, between the left border of the unrotated bounding box and the left border of the image.
top	float	The distance, in pixels, between the top border of the unrotated bounding box and the top border of the image.

{
  "response": {
    "annotations": [
      {
        "type": "box",
        "label": "pedestrian",
        "attributes": {
            "moving": "yes"
        },
        "left": 2,
        "top": 4,
        "width": 3,
        "height": 5,
        "uuid": "65ec1f52-5902-4b39-bea9-ab6b4d58ef42"
      },
      {
        "type": "box",
        "label": "car",
        "attributes": {
            "moving": "yes"
        },
        "left": 7,
        "top": 5,
        "width": 14,
        "height": 5,
        "uuid": "0a6cd019-a014-4c67-bd49-c269ba08028a"
      },
      { ... },
      { ... }
    ]
  },
  "task_id": "5774cc78b01249ab09f089dd",
  "task": {
    // populated task for convenience
    ...
  }
}

{
  "response": {
    "annotations" : [ 
      {
        "label" : "car",
        "attributes" : {},
        "uuid" : "122a4270-f9b2-4f66-a9ca-2e06f0de66e5",
        "width" : 121.878523862864,
        "height" : 71.6961921895555,
        "rotation" : 1.2440145049532,
        "left" : 613.440037825633,
        "top" : 199.208745812549,
        "type" : "box",
        "vertices" : [ 
          {
            "x" : 688.769014855216,
            "y" : 165.835344251165
          }, 
          {
            "x" : 727.891633787782,
            "y" : 281.264089660824
          }, 
          {
             "x" : 659.989584658913,
            "y" : 304.27833956349
          }, 
          {
            "x" : 620.866965726348,
            "y" : 188.84959415383
          }
        ]
      }
      { ... },
      { ... }
    ]
  },
  "task_id": "5774cc78b01249ab09f089dd",
  "task": {
    // populated task for convenience
    ...
  }
}