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

Figure 4 Control patient images. A-C: Patient 3 (no villous atrophy); D-F: Patient 4 (no villous atrophy); A, D: The grayscale endoscopic images; B, E: The three-dimensional projections; C, F: Projections in false color. Note the lack of prominent protrusions evident in the three-dimensional projections of both patients, even though there is a dissimilar appearance of texture in the original two-dimensional endoscopic images.