On Mon, Dec 12, 2016 at 2:40 AM, johannes hanika <[email protected]> wrote: > hi, > > my try: > > https://jo.dreggn.org/noisydog.jpg > > xmp in jpg: something with near linear base curve, equalizer, and no > sharpening. not sure about the colours, they are just different. > > in general for such super high iso noise the noise profiles are often > times off due to strange effects (noise model breaking down, vendor > pre-processing or whatever). also i find i can get better results with > manual equalizer operation than with the profiled denoising, but > that's a matter of taste and time i want to spend on an image. > > -jo
Hi, The colors are different because I used Rec2020 as input color profile. Yes it is a rather arbitrary choice which happens to result in a more pleasing (to my eyes at least) colors. After applying your xmp and switching to Rec2020, the colors are now very close: http://i.imgur.com/pKnGwxi.jpg Upon closer inspection this version eliminates even more color noise than RawTherapee's automatic mode does; there are basically no traces of chromatic noise even if you pixel peep at 100%. However the color also seems to be more washed out with a very slight purple tint in the dark areas. I think I will switch to equalizer based noise reduction when dealing with high ISO images in darktable as it clearly works better than profiled denoise here. Thanks for your example jo. PkmX ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
