COCO metrics only evaluated on image_ids with predictions

[digital-nomad-cheng]

keras-cv/keras_cv/src/metrics/coco/pycoco_wrapper.py

Lines 223 to 227 in 94b0a55

	coco_dt = coco_gt.loadRes(predictions=coco_predictions)
	image_ids = [ann["image_id"] for ann in coco_predictions]
	coco_eval = COCOeval(coco_gt, coco_dt, iouType="bbox")
	coco_eval.params.imgIds = image_ids

The pycoco_wrapper only evaluates on images where there is a prediction, and leave out image_ids where there is not prediction.
This is a serious bug if I understand it correctly. The coco metrics should be evaluated on all the images.
Correct way to do this should be below, without filtering image_ids.

    coco_dt = coco_gt.loadRes(predictions=coco_predictions)
    coco_eval = COCOeval(coco_gt, coco_dt, iouType="bbox")