Hi, does anyone have any tips for using the wavelets mode of the denoise profile module on darktable? I use non local means most of the time, but I prefer wavelets for portraits to preserve more skin details.
I have watched videos on it and I think I got how it works in general, but I usually spend too much time fiddling with the curve until I find something that suits the picture. I would like to know if anyone has a good preset that could be used as a starting point instead of the standard “flat line”. Any tips on how to make a simpler/better use of this tool would be welcome!
I’ve created a number of presets in Y0. The presets apply different levels of strength 1, 2, 3, and pull down the fine details by different amounts 1, 2 or 3 lines, per strength. That way I can just toggle through the presets for each image. However I learnt something reading the document @Matt_Maguire linked too - the R,G,B method looks interesting if one has the time.
The R, G, B method looks like it could benefit from a visualisation tool so that you can view the channels while setting their curves, without having to go to the channel mixer module and back.
Ah, didn’t catch this one. But it was Bruce’s video on Denoise Profiled that first helped me understand the wavelets tool (coupled with the important top comment by @rawfiner
Thanks for all the references, I already learned a lot!
Just another question. When denoising portraits, it always seems to me that wavelets also preserves skin colors better than non-local means. Is there anything I could do to obtain similar results when using non-local means?
