Fig. 9: Performance of filtering algorithms for phase denoising.
From: Strategies for reducing speckle noise in digital holography
a Noisy phase map of a simulated fringe pattern with realistic speckle decorrelation noise, with an input cosine SNR of 3.59 dB, b denoised phase map with the windowed Fourier transform method, with the output cosine SNR estimated at 30.11 dB, and c ranking of 20 selected denoising algorithms in terms of mean standard deviation of phase error; with an error of approximately 0.03 rad, the windowed Fourier transform method (Wtfr2 in the graph) has the best rank. Adapted with permission from ref.47 [OSA The Optical Society]
