20210314SegmentationEvaluation COCO dataset 1. classes 2. Metrics Leaf category metrics mIoU % Mean IoU(prinary challenge metric) IoU = TP/(TP+FP+FN) fIoU mAcc pAcc Supercategory metrics $mIoU^S$ $fIoU^S$ $mAcc^S$ $pAcc^S$ 3. COCO top