Fig. 3.

A 2-D segmentation output of global and local experiments at two different cross sections above CoW (a,b,c) and below CoW (d,e,f). (a) and (d) Original slices, (b) and (e) Output of global segmentation, and (c) and (f) Output of local segmentation. Segmented vessels are colored in red and the enhanced segmentation results (of the local experiment) are contoured in blue. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)