This photo was saved in jpeg 100%, raw denoising of 0.004. I managed to get rid of the majority of the bands, but you can see some lines above/around the sun. https://www.flickr.com/photos/andrefelipecarvalho/22536463868/
2015-11-11 22:34 GMT-02:00 André Felipe Carvalho <afelipe.carva...@gmail.com >: > 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 > ============================================ > -- André Felipe ============================================ New beginnings are often disguised as painful endings. -------------------------------------------------------------------------------- Lao Tzu ============================================
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