wrong bbox height and width values on coco kp export for single keypoints

[CourchesneA]

Actions before raising this issue

• I searched the existing issues and did not find anything similar.
• I read/searched the docs

Steps to Reproduce

1. Create a project
2. Setup a skeleton with 1 keypoint
3. Annotate one image with any amount of objects
4. Export to COCO keypoints 1.0

Expected Behavior

The annotation file should contain bbox information computed from the keypoints. I.e.:

{"id":10,"image_id":1,"category_id":21,"segmentation":[],"area":0.0,"bbox":[1279.65,185.18,111.53,112.85],"iscrowd":0,"attributes":{"occluded":false,"keyframe":false},"keypoints":[1279.65,185.18,2],"num_keypoints":1}

What I get is 0.0,0.0 for bbox width and height

Possible Solution

No response

Context

On CVAT, a bbox is properly displayed around the keypoint. I would expect it to be exported as well, as it is the case when num_keypoints > 1

Environment

- cvat cloud

[bsekachev]

Please, refer to my answer in existing issue #6158

[bsekachev]

A point itself is infinitely small object, it does not have width and height. So, everything is correct in your case.