Glossary: Computer Vision Basics
IoU (intersection over union)
Also written: IoU, intersection over union
The overlap area of two boxes or masks divided by the area they cover together, from 0 (no touch) to 1 (identical). A predicted box usually counts as correct when it has the right label and an IoU of at least 0.5.
Where the book teaches it
Related terms
bounding boxbox helpers (box_convert, box_iou)mean average precision (mAP)