Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Terry Duell
On Fri, 04 Nov 2016 03:53:34 +1100, Andy wrote: Thank you all for the answers, and sorry I misinterpreted the raw demosaic. FYI, here are some (screenshot) samples using the standard demosaic. Please don't add large attachments (9.5MB arrived here) to posts to groups, most don't need to

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread darktable
On Thu, 3 Nov 2016 22:53:32 +0300 Roman Lebedev wrote: > >Maybe i should go back to read-only mode. > Please don't. You have helped me and I have learned a whole bunch of stuff from your replies to others. -- sknahT vyS ___

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Roman Lebedev
On Thu, Nov 3, 2016 at 10:39 PM, Oliver Bedford wrote: > Roman, > > I appreciate your work, but that's not an excuse for being rude. > In this context I've used the hot pixel module and I see a reduction of > otherwise distracting artefacts (whatever their technical origin may > be). I've in no w

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Oliver Bedford
Roman, I appreciate your work, but that's not an excuse for being rude. In this context I've used the hot pixel module and I see a reduction of otherwise distracting artefacts (whatever their technical origin may be). I've in no way implied that this is the ultimate solution, but in difficult cas

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Matthieu Moy
- Original Message - > On Thu, Nov 3, 2016 at 9:49 PM, Oliver Bedford > wrote: > > It seems the profiled denoise does produce some artefacts, which look > > like hot pixels (and aren't visible in the original image or are buried > > under the extreme colour noise). You can combat this si

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Roman Lebedev
On Thu, Nov 3, 2016 at 9:49 PM, Oliver Bedford wrote: > It seems the profiled denoise does produce some artefacts, which look > like hot pixels (and aren't visible in the original image or are buried > under the extreme colour noise). You can combat this side effect with > the dead pixel module. .

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Oliver Bedford
It seems the profiled denoise does produce some artefacts, which look like hot pixels (and aren't visible in the original image or are buried under the extreme colour noise). You can combat this side effect with the dead pixel module. There's also a "large-scale" colour noise present, for which yo

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Roman Lebedev
On Thu, Nov 3, 2016 at 6:59 PM, KOVÁCS István wrote: > The HSV-based solutions look inferior to me. Last September, I started > a thread, but it did not get far. See the message quoted below - the > sample images are available at > http://tech.kovacs-telekes.org/files/dt_profiled_denoise_colour_vs

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread KOVÁCS István
The HSV-based solutions look inferior to me. Last September, I started a thread, but it did not get far. See the message quoted below - the sample images are available at http://tech.kovacs-telekes.org/files/dt_profiled_denoise_colour_vs_hsv_colour/ Thanks, Kofa -- Forwarded message ---

Re: [darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Roman Lebedev
On Thu, Nov 3, 2016 at 5:57 PM, Andy wrote: > Hi all. > I'm new to darktable and somewhat new to raw image processing so please > excuse me if this is a naive question. > I was trying to denoise some images from my Sony a7 II R shot at 51200 ISO. > I followed some tutorials that recommended applyi

[darktable-user] Demosaic and color denoise leads to green artifacts

2016-11-03 Thread Andy
Hi all. I'm new to darktable and somewhat new to raw image processing so please excuse me if this is a naive question. I was trying to denoise some images from my Sony a7 II R shot at 51200 ISO. I followed some tutorials that recommended applying wavelet denoise with blend=color and non-local m