Figure 3From: Robust spectral analysis of videocapsule images acquired from celiac disease patients Ensemble power spectra random and temporal phase noise is imposed as in Figure 2. In each ensemble power spectrum, the dominant frequency at 0.2Hz (DP = 5s) is the highest peak. As compared with the Fourier power spectra in Figure 2, the ensemble power spectra have no split peaks (panels A, B, and C) and are not degraded by high noise levels (panel D). Unlike for the Fourier power spectra of Figure 2, random and temporal phase noise at these levels have little effect on any of the details in the ensemble power spectra.Back to article page