Really good result indeed! 2016-12-08 12:08 GMT+01:00 Stéphane Gourichon < stephane_darkta...@gourichon.org>:
> Le 08/12/2016 à 00:44, Saint Germain a écrit : > >> Hello, >> >> I just bought a Samsung NX1 and would like to use Darktable to process >> the RAW (SRW). >> >> However I really tried but I couldn't manage to get correct colors or >> to have a good noise reduction in high iso situation (low light). >> >> I've tried LightRoom and RawTherapee and I managed (without knowing >> these softwares) to get quite good results in under 5-10 minutes. >> So far I think I've spent several hours with Darktable... >> >> I would really like to stay with Darktable (as I find the interface >> quite pleasant and it offers a lot of useful features) but I really >> need to have good colors and good noise reduction (at least comparable >> to LR and RT) without too much tinkering. >> >> From what I have heard, it seems that Darktable noise reduction is >> very powerful and actually superior to LR or RT. Basic noise reduction >> in LR or RT is very simple : 2 sliders and that's it (Luminance and >> Details). However it is quite effective, and I haven't been able to do >> better with Darktable (and it took me much more time, I even made a >> noise profile !). >> >> Perhaps am I doing something wrong ? >> Can someone guide me or show me how to proceed ? >> > > Hello. > > Thanks for sharing all details. > Attached is my take on it. > > Given base material (high iso, not much actual detail) I took a somehow > more aggressive approach than usual (on the "preserve detail" vs. "kill > noise" spectrum). > > Here's the parameter dump: > * disable base curve > * disable profiled denoise > * RAW noise reduction, default parameters > * increase exposure +3.10EV so that brightest part (yellow title) is just > on top > * bilateral filtering, red 0.04 green 0.02 blue 0.1 > * non-local means, default parameters > * optionally, equalizer preset "noise reduction" > * sharpen, default parameters > > Here are the rationales for those choices : > * disable base curve: source is low dynamic range (paper) and furthermore > already has its own base curve > * disable profiled denoise: haven't imported your profile. Anyway, when > strong, generally does not perform well with bilateral. > * RAW noise reduction: filters part of noise, at the cost some > high-frequency killing which is okay in this specific case > * bilateral filtering: attenuates large area hue variations somehow, > without losing details at this strength > * non-local means: filters out some residual speckles > * equalizer: reduces noise some more, at the cost of more loss of details > * sharpen: to selectively recover edges attenuated by equalizer > > Somehow off-topic: > * to correct barrel: chosen hackish lens correction parameters: NX10 and > 20-50 F3.5-5.6 ED, looks good > * set white balance "spot" selecting white part of title. Much better > color, well, balance. Reset it to see how previous case could hide > yellowish noise stains in white areas. > * Subject is still. Why didn't you choose a longer exposure ? ISO would > have been lower, so less noise to begin with. > > Regards. > > -- > Stéphane Gourichon > > > > ____________________________________________________________ > ________________ > darktable user mailing list > to unsubscribe send a mail to darktable-user+unsubscribe@lis > ts.darktable.org > -- Pascal Obry / Magny Les Hameaux (78) The best way to travel is by means of imagination http://photos.obry.net http://www.obry.net gpg --keyserver keys.gnupg.net --recv-key F949BD3B ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
