Robert Krawitz schrieb am 08.03.2018 um 03:52:
I found some improvement recently on my D500 by playing with
demosaicing before doing anything else.
I have adjusted the settings in such a way that the structure of the
noise appears as "even" as possible. This makes the artifacts less
conspicuous after denoising.
On Wed, 7 Mar 2018 20:36:14 +0100, Matej Martinovic wrote:
denoising in darktable is somewhat tricky:
Use the *denoise (profiled)*, set it to "wavelet" and set blend mode to "color". This
eliminates the awful color noise. Use a *second instance* of denoise (profiled), set it to non-local means
and choose blend mode "lightness". With that second instance i'll usually reduce the strength or
opacity to my liking to keep some detail.
You can set some presets and have them apply the correct denoising
This info is also available in the manual
https://www.darktable.org/usermanual/en/correction_group.html, under 126.96.36.199.
Denoise – profiled -> mode.
I've tried this also a number of times, and also find the NR from
Darktable unsatisfactory compared to RawTherapee. I'm using a
7DnmkII, typically at ISO 6400-8000. I've posted a number of examples
It's unfortunate; there are other reasons I'd prefer to use Darktable,
but when I need significant noise reduction, the artifacts I get are
simply not satisfactory.
On 2018-03-07 19:59, darkta...@911networks.com wrote:
I'm having problems with the denoising:
Canon 7DMkII and Canon 70-200L IS f/4 ISO1250
* before denoise: https://i.imgur.com/k9Njy70.png
* denoise profiled: https://i.imgur.com/Unw2i8O.png and it's very
* equalizer denoise: https://i.imgur.com/8E1CzHt.png (w/o the
denoise profiled). Less blotchy than profiled but not good either.
I have also tried Rawtherapee
* after noise reduction: https://i.imgur.com/Js5ZGfd.png and it's
What can I do to improve the image?
Worth a try I guess.
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