Figure 4
From: Robust spectral analysis of videocapsule images acquired from celiac disease patients
Videocapsule simulation with random noise and spatial phase shift (jitter) imposed. A. Average of frames 1, 11, ..., 191 before adding random noise and jitter. B-F. Average of frames 1, 11, ..., 191 when spatial frame shift is used to impart jitter. In all panels B-F, jitter is caused by rotation of each row of pixels by 20 pixels, White noise was present in 0, 25, 50, 75, and 90% of frames used to construct panels B-F, respectively.