Fig. 6: Comparison of speckle reduction filters, which are applied on a dice image that was reconstructed from its digital holographic recording.
From: Strategies for reducing speckle noise in digital holography
a Back-propagation from the original hologram, b denoised with the median filter, c denoised with the Frost filter, d denoised with the Lee filter, e denoised with the bilateral filter, f denoised with the wavelet thresholding filter, and g denoised with the NL means filter. Reprinted with permission from ref.60 [OSA The Optical Society]
