Fig. 8.

The samples with acceptable and unacceptable results. The upper row shows the original mammograms, and the under row shows the segmentation results. a The acceptable sample mdb003 with over-segmented pectoral muscle; b the acceptable sample mdb032 with under-segmented pectoral muscle; c the unacceptable sample mdb061, it is unacceptable because pectoral muscle region and breast parenchyma have uniform gray intensity around the truth boundary; d the unacceptable sample mdb123, it is unacceptable because pectoral muscle region has abnormal split line