On Thu, Dec 27, 2012 at 12:42 PM, johannes hanika <[email protected]> wrote: > On Thu, Dec 27, 2012 at 6:19 AM, Pascal Obry <[email protected]> wrote: >> >> I have tested the new denoise module a bit more deeply today. I feel >> that there is something wrong with it. >> >> To me the denoise module does too much smoothing of the image and we are >> loosing lot of details. > > it's optimizing peak signal to noise ratio, not subjective detail. i > like noise, so i think especially for still images, a little noise > contributes to the perceived detail in the image. > >> I'm wondering if this is not because it applies >> on the chromatic and on the luminance noises. The former is probably ok, >> but the later is often the cause of details loosing. >> >> In fact I'm able to get far better (read here something that is close to >> what LR4 does) results with the equalizer using only the chroma curve. >> >> Would it be possible for the denoise module to do something similar? > > not really, it reverses the physical noise on the three sensors (which > are camera linear rgb, not Lab). > > it's probably possible to do some luma/chroma blending after denoising > with some custom color space conversion in the module.
i take it back. here's how you would do it: - switch on the denoising module - enable blending, go to `color' mode - if you want to denoise luma, too, create another module instance and use regular blend mode not optimal and computationally wasteful, but works today. jo ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_122712 _______________________________________________ darktable-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-devel
