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

Figure 1 Celiac patient images. A-C: Patient 1; D-F: Patient 2; 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). Patient 1 did not have a biopsy obtained due to hemophilia but was thought to have a Marsh score IIIC. Patient 2 also had a Marsh score IIIC. Note the prominent protrusions evident in the three-dimensional projections of both patients, and the similar appearance of texture in the original two-dimensional endoscopic images.