Use of shape-from-shading to characterize mucosal topography in celiac disease videocapsule images

Figure 2 Celiac patient images. A-C: Patient 3 (Marsh IIIC score); D-F: Patient 4 (Marsh IIIB pathology); A, D: The grayscale endoscopic images; B, E: The three-dimensional projections; C, F: Projections in false color. Colors from blue to yellow, orange, and red represent areas with progressively greater amplitude along the Z-axis (vertical axis). Again note the prominent protrusions evident in the three-dimensional projections of both patients, even though the appearance of texture is somewhat dissimilar in the original two-dimensional endoscopic images.