Digital photo de-noising software suggestions?

[Maxcess]

Hello Walter

I not sure what you are asking.
It has always been my experience (others will argue) that the png images gives a more acurate colour and larger data size and can be more grainy.
I opened both images up in my gimp and conpared the details. I then saved your png as a jpg in the same phyical size as your jpg and there was a comprise of both of your images in date size and colour detail and clarity (less grainy).
FYI - in your png, you have more yellow. Look at the tree near the middle and the grass at the bottom. That is where its more noticable. Hense more realistic for the season.

Abby
----- Original Message -----
From: Walter Dnes
Sent: 05/07/13 11:11 PM
To: Toronto Linux Users Group
Subject: [TLUG]: Digital photo de-noising software suggestions?

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 -- The Toronto Linux Users Group. Meetings: http://gtalug.org/ TLUG requests: Linux topics, No HTML, wrap text below 80 columns How to UNSUBSCRIBE: http://gtalug.org/wiki/Mailing_lists
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