Digital photo de-noising software suggestions?

[ted leslie]

Interesting! i chucked the png into a gimp despeckle and it improved it,
but one has to then look at how much clarity may be taken away from
sharpness of the needles, etc.
Be interesting to see if you find a solution that works great. post
results!.
-tl


On Tue, May 7, 2013 at 11:11 PM, Walter Dnes <waltdnes-SLHPyeZ9y/tg9hUCZPvPmw at public.gmane.org> wrote:

>   Linux-based of course.  I currently have rawtherapee, imagemagick,
> ufraw, gimp, and gmic on my disk, for various reasons.  I took my Canon
> S100 out for a torture test today, to see how high I could push the ISO,
> before it got badly noisey.  I noticed that the jpeg is a lot cleaner
> than the output from the RAW, probably due to in-camera processing.  The
> question I have is how do I do it.  For a comparison, compare the blue
> sky in the upper left corner of the 2 images...
> http://www.waltdnes.org/misc/IMG_0118.png (warning 25 megabytes)
> http://www.waltdnes.org/misc/IMG_0118.JPG (warning  3 megabytes)
>
>   The png was obtained from the raw CR2 image by rawtherapee.  The JPG
> comes direct from the camera.  A Google search turns up technical
> discussions about "radius" of smoothing, which I don't understand.  E.g.
> The ufraw-batch command has a "--wavelet-denoising-threshold" parameter.
> And the ufraw gimp plugin has a "Denoise" slider.  Is there a simple
> layman's explanation somewhere, and a list of suggested parameters to
> use?
>
> --
> Walter Dnes <waltdnes-SLHPyeZ9y/tg9hUCZPvPmw at public.gmane.org>
> I don't run "desktop environments"; I run useful applications
> --
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