Open source noise reduction
A while ago I was pointed at Noise Ninja which is a great program for reducing picture noise. While investigating, I found a few other options, but no open source options. Looking at it again today I found that there are a few plugins for The GIMP in the works: most notably Dcam Noise 2, but also ISO noise reduction. I wonder what’s keeping the open source world away on this, but I’m glad to see someone’s working on it at least. At the moment I’m just adding a bit of blur to my images using GIMPShop and *shriek* iPhoto 5
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The Cimg-based “Image Restauration” in Krita (from KOffice) is what I’ve been using for denoising so far. It’s pretty good, just godawful slow.
Thanks for the tip. I’ve been using the Gnome desktop mainly so I don’t know KDE to well, but it’s installing as we speak.
I’m looking forward to trying it out
I use DCAM noise a lot. It works quite well, although sometimes images can look washed out and lack detail.
I find selective blur works rather well too, just give it a small “max delta” to reduce the amount of blurring.
I came across Cstoration too and manged to get it working, but there are so many options, and it’s so slow that I rarely use it.
Finally, if noise really is an issue then I sometimes chance my arm, and convert an image to black and white. That works wonders, because noise can add to a b/w image!
Thanks for pointing out ISO noise reduction, I hadn’t come across that!
[...] What are your options when you don’t run Windows or Mac and/or don’t want to use proprietary software? Niklas Saers covers some of the options in this blog post. Thanks to him, I learned about ISO Noise Reduction, a GIMP plugin, which I’ll give a try tomorrow. I usually use DCAM Noise, or selective blur to remove offending pixels but that can leave awful looking smooth areas next to unsightly pixels. [...]