[Feature] support format-only on tools/test.py

[yuvalgrossman]

What's the feature?

Hi, I need to run a model on some data (inference or test) and produce an output file in format of COCO json. I saw that in the main branch it is possible using the "--format-only" argument, however it does not exist in the 1.x branch (which I have to use because I need RTMDet), which only supports pickle output file. I saw a TODO in line 15 of tools/test.py referring to add support in that option. How come it is deprecated? I think of implementing it but I think maybe I'm missing something?

Also, as far as I know, in the COCO format there is not predefined attribute for rotated bounding box. There are two options I think of:

1. add a custom attribute named "r_bbox" and decide on a specific rotated bbox format (oc/le135/le90)
2. use the "segmentation" attribute for the 4 point polygon

either way I think the main "bbox" attribute should be occupied with the horizontal bbox.

will be glad for some direction here Yuval

Any other context?

No response

[zytx121]

Hi @yuvalgrossman, in MMRotate, we don't support output JSON results now.

If you want to output the JSON results, you can try as follow:

• modify the config to coco style https://github.com/open-mmlab/mmrotate/blob/1.x/configs/_base_/datasets/dota_coco.py
• modify the results2json to support rbox https://github.com/open-mmlab/mmdetection/blob/ecac3a77becc63f23d9f6980b2a36f86acd00a8a/mmdet/evaluation/metrics/coco_metric.py#L206
• Refer MMDet's document https://mmdetection.readthedocs.io/en/latest/user_guides/test_results_submission.html to output JSON results.