Fig. 8
From: Metrics for evaluating 3D medical image segmentation: analysis, selection, and tool
The effect of segment density. Two segmentations b and c are compared with the corresponding ground truth (a). b has a solid structure while c has a lower density due to large number of tiny holes uniformly distributed inside it. Although c has a a higher accuracy of the boundary than b, all metrics, excepts MHD and HD, give b a higher score than (c)