RoiSet facilitates object detection models
- created distinct generator class methods for RoiSet
- RoiSet.from_bounding_boxes can create RoiSet with just YXWH coordinates and no segmentation, e.g. as output from object detection models
- can also inspect and quantify overlap between and within RoiSet(s), at both bounding box and segmentation level
- can generate RoiSet from polygon segmentation e.g. in COCO segmentation models