I'm trying @BrutPitt denoise filter (right half part is denoised). I need to tweak the values to improve the result. Tomorrow is finishing porting that to webgl.pic.twitter.com/7L06gnaU87
Indeed! This filter is not specific for SPP where there is a great differential between near pixels. To obtain a discreet result need to increment the threshold, not so much the radius, but in this way you lose sharpness and get a blurred image
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This is a "simple" bilateral filter with threshold value, optimized for glsl/GPU. One of the applications where works better is on granularity produced from differences of sensibilities of the ccd pixels, like night movies in low light.
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SPP filters that use a bilateral or (a-trous) base filter, add to it more other features like: variance estimation, edge-avoiding (wavelet transform), edge-stopping, etc... and take into account also the previous frames. But I continue to be curious to see the result
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