Le 27/12/2012 22:10, johannes hanika a écrit : > [..] >> A strength of 1.5 (even 2) on chroma is not a problem. >> Denoising on (r+g+b), (r-g), (b-g) with a different strength for the >> first one could work, and is very simple. I am still not sure if this >> transformation have to be done before or after the poisson-gaussian >> noise transform (I think before should be ok). > your channel r+b+g will have all three variances in it, and r-g would > have two of them added up (but the signal part will be much lower in > magnitude probably). :/ > I have played a little with the code this afternoon, the results were not very different from the r,g,b denoising. I have taken into account the variance modification and the wb in the transform and have to bias the (r-g),(b-g) channel since the backtransform assume a positive value. Well ... it works, but it was still impossible to control chroma and luma noise independently, the strength control on the two "color" channel having almost no effect, so it is quite useless ;-)
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