How to extract bounding boxes

[Matthias1982]

Hello

I tried as an excerise to extract bounding boxes from example "random_backgrounds". I have most probably an understanding problem.
With "write_coco_annotations" the annotations are writen in a *.json file. The json file contains among other information the bbox und the segmentation. Is there an option to extract directly without an own script only the bounding boxes? The pictures in "examples -> advances -> coco_annotations" indicates that it should be possible?

I need the bounding boxes to train a yolov8 model.
With Roboflow I do the conversion from coco to yolo format.

Thank you in advance for the support

[njsymanz]

CocoWriterUtility.py has a static method "bbox_from_binary_mask" which, as the name suggests, is calculating the bounding boxes based on instance segmentation maps which you can get from data["instance_segmaps"]. You can copy and paste it with a couple of tweaks to get the bounding boxes without dumping them into a json.