Fig. 4: Encoding holograms for speckle-noise reduction.
From: Strategies for reducing speckle noise in digital holography
a Set-up for hologram recording; G is the rotating ground glass that is used for multiple recordings with noise diversity. b–g Amplitude reconstructions in the cases of thin (b) and large (e) speckle grains; c, f are the results of the AS method, while d, g are the results that are obtained by using the encoding method. Adapted with permission from ref. 35 [OSA The Optical Society]
