WIP : prefilter denoise module #102
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Add a prefiltering step using 3D guided filter and guided laplacian to exploit inter-channel correlations to :
It uses the noise profiles in an Anscombe transform for proper mixed gaussian-laplacian noise distribution.
Can be used alone as a demosaic post-filter dealing with aberrations or as a pre-filter for the non-local means denoising (non-local means deal with intra-channel spatiality, this with inter-channel correlation).