Fig. 6:

Haustral fold detection and segmentation for a complete colon dataset. (a) Fiedler vector computed for a colon dataset. (b) Equi-sampled level sets computed based on (a). (c) Planes fitted to the level sets in (b) with the level sets projected to the planes. (d) Haustral fold contours detected based on the normalization of the planes in 2D. (e) Haustral fold segmentation based on the cross curves shown in Figure 5. (f) Flattened Fiedler vector representation corresponding to the 3D view in (a). (g) Flattened haustral fold segmentation corresponding to the 3D view in (e).