I use something similar, though I haven't found a difference in using
larger patch-sizes for non-local means.
I'm aware of the options and saw the equalizer tutorial, I just felt I'm
missing something since it doesn't behave the way I expect it to.
Removing the highest frequency wavelets should remove high frequency
noise, but I guess the equalizer doesn't actually down-weight the
wavelets but does something more complicated. From the docs I thought
that setting "edges" very low I could recover the naive wavelet
decomposition behavior, but that didn't seem to be the case.
On 04/13/2017 03:55 PM, Guillermo Rozas wrote:
I get very good results for "medium noise" (ISO 800 in a 5D mk II)
using two copies of the profiled denoise module:
- first: wavelets, strength 1.0, blend mode color 100%. This erases
all traces of color noise (the more annoying for me), but introduces
extra luma noise.
- second: non-local means, patch size 4, strength 1.0, blend mode
lightness 50%. I also found this module was very harsh on the details
until I used this patch size and blend percentage combination.
Using a before/after snapshot at 100% magnification I don't find any
significant loss off detail, and just a little increase in image
artifacts. For lower noise (ISO 100-200), I usually go only with the
first copy (color noise).
Hope this is useful for you.
Regards,
Guillermo
On Thu, Apr 13, 2017 at 10:07 AM Andy <t3k...@gmail.com
<mailto:t3k...@gmail.com>> wrote:
I don't get great results with the de-noising modules. I can
smooth over
the noise with the wavelet denoising,
but that also looses a lot of details.
____________________________________________________________________________
darktable user mailing list to unsubscribe send a mail to
darktable-user+unsubscr...@lists.darktable.org
____________________________________________________________________________
darktable user mailing list
to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
