What is difference between intersection over union (IoU) and intersection over bounding box (IoBB)? Can someone give a detailed explanation IoU and IoBB along with that the differences between them.
The Intersection over Bounding Box is the Intersection over Union (IoU) for object detection tasks, where you have a bounding box.

There are many tasks (e.g. image segmentation) where you have an IoU (the predicted segment vs the actual segment), but there are no bounding boxes.