Fig. 9.

Multispectral image analysis facilitates segmentation of (a) outer layer of the lumen (serosa) and (b) inner layers of the lumen (mucosa and submucosa layers). (c) The cut edge is automatically extracted by pixelwise multiplication of a dilated map of outer and inner layers of the lumen. (d) A bite depth map $B(u,v)$ is generated by translating and smoothing the cut edge by 1.5 times the thickness of the tissue. (e) Overlay of the bite depth map on a single-band image for better visualization.