On Wed, Nov 11, 2015 at 11:05 PM, Tobias Ellinghaus <h...@gmx.de> wrote: > Am Dienstag, 10. November 2015, 19:15:10 schrieb André Felipe Carvalho: >> I've been experiencing this behavior specially in sunset photos. >> >> After applying the modules that I want, among them the sharpness module, if >> I want to get rid of the raw noise, the exported jpeg shows bands on the >> degrades parts of the image (sky, for instance, or dark areas). >> The exported image without Raw Noise Reduction is about 6.8MB, while the >> one with noise reduction goes down to 2.8MB. Why's that?
that's normal, noise has high entropy and doesn't compress as well as the low noise one. did you only do raw denoising? or any non local means, too? any wavelet based method shouldn't lead to as much banding as nlmeans (because the latter uses a piecewise constant prior). -jo > > - What is your "quality" setting in the export module? > - Could you try exporting to PNG and see if that has the same problems? > >> The IQ is bad (because of those bands) and I have to turn noise reduction >> off. >> >> I can provide some samples, or the raw file and the .xml associated. > > Tobias > ------------------------------------------------------------------------------ > > _______________________________________________ > Darktable-users mailing list > Darktable-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/darktable-users > ------------------------------------------------------------------------------ _______________________________________________ Darktable-users mailing list Darktable-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/darktable-users
