Am 28.12.2017 um 11:35 schrieb FK: > Am 27.12.2017 um 22:41 schrieb Matthias Bodenbinder: >> But my initial question is more from a theoretical point of view. I am >> just curious about the algorithm so to speak. Does it make a >> difference if denoise profile, wavelet, unifom blend color is applied >> before or after denoise profile, wavelet, unifom blend lightness. Does >> the order matter at all? >> Matthias >> > Hi, > > wow, three denoise steps. Does take some computing time ;-). I use two:
Yes, thats true. But the result is good. > > #1: wavelets, strength: 0.25, blend mode: color 95% > #2: non-local-means, strength: 1.0, blend mode: lightness 40% - 50% I tried your settings as well, but for high ISO I get best results with 3 profile denoise instances. It is #1: wavelet; color #2: wavelet; lightness #3: non-local: average I keep strength at 1 and opacity at 50%. This is my default setting for ISO higher than 10.000. For even higher ISO ike 25.600 I go with opacity 75% and 100% for #2 and #3. In the meantime I tested different instance sequences: 1-2-3 / 2-1-3 / 3-1-2 / 3-2-1 I compared exported 16bit PNG. Just by viewing the pictures I did not find differences. Then I loaded the images into gimp 2.9.8 in different layers. When applying overlay mode "difference" the result is a pure black picture with just a very very few changed pixels in the noise. So for me, by all pratical means, the resulting images are indistinguishable. > > I did some tests some time ago and found these settings (and this order) > o.k. though it slowed down the performance quite a bit. > Not sure whether the order changed much, but i.m.o. it makes sense to > get rid of the color-noise first and smooth the result afterwards a bit. > But that's just trial and error here. > > Would be interested in the opinion of someone with some insight > knowledge too :-) > > Regards, > > Felix > >> >>> In the exact order you see in the right sidepanel, from bottom to top. >>> >>>> I have the following scenario: >>>> >>>> I apply the profiled denoise module 3 times. All three blended "uniformly" >>>> but with a differen blend mode: >>>> #1: wavelets, blend mode: color, 50% >>>> #2: wavelets, blend mode: lightness, 50% >>>> #3: non-local-means, blend mode: average, 50% >>>> >>>> I am now wondering if the order in which these 3 instances are applied >>>> makes a difference. >>>> >>>> Matthias >>> Roman. >>> > > ____________________________________________________________________________ > darktable user mailing list > to unsubscribe send a mail to [email protected] > > ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
