If using Windows, we recommend using 7-Zip to unzip the exported labels.
COCO export is not available for PCD scenes.
All coordinates in the COCO format correspond directly to pixel values. Refer to the COCO documentation for details on the COCO format.
| Key | Description | Notes |
|---|---|---|
annotations | Contains all label information | |
area | The area contained by the label | in units of square pixels |
attributes | A list of attributes belonging to a label | |
classifications | All radio and checklist attributes and their answers | |
#relation | The hash of the ontology object the label is related to | The hash is the object’s unique identifier |
encord_track_uuid | A unique identifier for the object instance | The same as the objectHash in a JSON export. |
manual_annotation | Indicates whether the annotation was created manually. | True is the annotation is manual, False if created using automated labeling techniques |
track_id | The unique identifier for the instance the label is associated with | The value is the same for all annotations belonging to the same instance |
bbox | Pixel coordinates for the top-left corner of a bounding box that encloses the label. This is provided for all shape types. | |
category_id | A numerical ID linking this annotation to a field in the categories list containing Ontology information. | For example, the category_id value 1 in an annotation links it to the corresponding Ontology shape with the ID 1 in the categories field of the export. |
id | The unique identifier for the label | Each label has a unique identifier, irrespective of which instance it is associated with |
image_id | The ID of the image or frame the label is on | For example, ID 0 indicates that the label is on the first image in the images list of the export |
iscrowd | The iscrowd field specifies whether the annotation represents a single object (iscrowd=0, using polygons) or a collection of objects (iscrowd=1, using RLE). Single objects may require multiple polygons if occluded, while crowd annotations are used for large groups of objects (e.g., a crowd of people) | |
keypoints | The keypoints field is a list of coordinates and visibility flags for specific points on an object | |
num_keypoints | The num_keypoints field indicates the number of labeled keypoints (v > 0) for an object. Objects without labeled keypoints (e.g., small or crowd objects) have num_keypoints=0 | Keypoints and their connections (skeletons) are defined in the categories section, which includes the names and connectivity of the keypoints for visualization |
segmentation | Contains the (x,y) pixel coordinates for all label vertices | |
categories | Contains Ontology information | |
name | The object’s name in the Ontology | |
supercategory | The name of the object’s class | |
keypoints | keypoint for keypoint labels. Omitted for all other labels | |
skeleton | Defines connectivity via a list of keypoint edge pairs and is used for visualization | |
images | Contains file information for all modalities | |
coco_url | URL to the file if it is hosted on the COCO dataset’s official servers | Only meaningful when working with the official COCO tasks. In all other cases the coco_url field is empty. |
file_name | The name of the file | |
height | The height of the image or frame | Measured in pixels |
image_title | The title of the file | |
width | The width of the image or frame | Measured in pixels |
info | Contains additional information |