Figure 2From: Robust spectral analysis of videocapsule images acquired from celiac disease patients Fourier power spectra when random and temporal phase noise is imposed. The random noise magnitude is indicated at top left in each panel and the phase noise is the same for each panel. The actual DF is 0.2 Hz (DP = 5s). However, this peak is split in panels A, B, and C and is eliminated altogether in panel D.Back to article page