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Digital holography (DH) has emerged as one of the most effective coherent imaging technologies. The technological developments of digital sensors and optical elements have made DH the primary approach in several research fields, from quantitative phase i
The principle of speckle filtering consist in reducing the variance of Y in order to improve the estimate of its mean. The sample mean, Y , is defined as the empirical average of L independent realizations of a speckled intensity as follows ∑ = = L i i Y L Y 1 1 (6) It can be...
Ultrasound imaging technology has wide applications in cattle reproduction and has been used to monitor individual follicles and determine the patterns of follicular development. However, the speckles in ultrasound images affect the post-processing, such
Ultrasound images are inherently affected by speckle noise, and thus reducing this noise is crucial for successful post-processing. One powerful approach for noise suppression in digital images is Bayesian estimation. In the Bayesian-based despeckling schemes, the choice of suitable statistical models ...
The OCT image speckle noise reducing algorithm based on adaptive bilateral filtering disclosed by the invention can reduce the speckle noise of OCT image, reduce the mean square error of image and increase the peak signal-to-noise ratio; and meanwhile, the algorithm remarkably maintains the edge ...
Results The proposed algorithm has better speckle reduction and structure preservation than the three existing methods [P-M model, the speckle reducing anisotropic diffusion (SRAD) technique, and the detail preserving anisotropic diffusion (DPAD) technique]. And it is significantly faster than bilateral...
This compulsion takes to the introduction of a new de-speckling model via an adaptive hybrid filter model that includes four filters like guided filter (GF), speckle-reducing bilateral filter (SRBF), rotation invariant bilateral nonlocal means filter (RIBNLM), and median filter (MF) respectively...
and the numerical algorithm of it was achieved using a fractional differential mask operator.The proposed algorithm has better speckle reduction and structure preservation than the three existing methods [P-M model, the speckle reducing anisotropic diffusion (SRAD) technique, and the detail preserving ...
The oriented bilateral filtering method for removal of speckle noise in electronic speckle pattern interferometry fringesIn optical interferometry methods, a challenging problem is how to preserve the edges of all fringes perfectly whilst reducing speckle noise effectively. Directivity is an important ...