Fig. 6.

Illustration of PVS segmentation achieved by four different methods, with each row denoting a specific subject. The first column and the last column denote, respectively, the original images and the ground truth annotated by experts. The yellow ellipses and arrows indicate low-contrast PVSs that can be still effectively detected by the proposed method. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)