Hello Johannes, I was using Jpeg 97%
I use, normally, only the raw denoising, starting with 0.002 points, going to 0.006 if needed and the image colors permit. Experimenting with 0.004 raw denoising I can see some band even with the PNG 100% export. But I admit it's better then at 97% jpeg. The bands, now, are narrower than before. Less visible at the orange sky parts and more apparent at the dark, silhouetted parts. Pulling the Color Balance first factor (Levantar, in portuguese) a little bit to the left may help to disguise the bands. Thanks again, André 2015-11-11 14:24 GMT-02:00 johannes hanika <hana...@gmail.com>: > 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 > -- André Felipe ============================================ New beginnings are often disguised as painful endings. -------------------------------------------------------------------------------- Lao Tzu ============================================
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