Fig. 2.

Illustration of the Dice metric and contour distance metrics. A and B are two sets representing automated segmentation and manual segmentation. The Dice metric calculates the ratio of the intersection |A∩B| over the average area of the two sets (|A|+|B|)/2. The mean contour distance first calculates, for each point p on one contour, its distance to the other contour d(p,∂), then calculates the mean across all the points p. The Hausdorff distance calculates the maximum distance between the two contours