I can then use a lot of noise removal where there is a lot of noise, and a little bit of noise removal where there is not much noise and I want to preserve detail, by selecting one layer or the other before invoking the greycstoration plugin. After copying, pasting, and anchoring that layer mask, I invert the colors on the thresh-holded version and copy, paste, and anchor the inverted version to the other layer mask on the original photo. I adjust the sliders on the threshold tool until the result more or less covers the dark areas with a lot of noise on the original photo. Then I use the threshold tool on the duplicated photo to create a layer mask for one of the layers on the original photo. Then I duplicate the background layer on the original version and add an empty layer mask to both layers. The main thing that has helped has been adjusting the plugin for areas with more or less noise. Hi, I found this thread while looking for better noise removal techniques on Gimp, so obviously I don't have it 100% down yet! However, I've been using the Greycstoration plugin on Gimp with some success, and I wanted to share a couple of tricks that have helped a few of my photos. PhotoComiX (a group admin) edited this topic ages ago. "Asinotropy" is well visible in the GUI," -a" not there both indicate the same user control (-a float_number :) This parameters set. No much changes i just use the Rosetta Stone to add as prefix the name used for the plugin sliders and input boxes as exampleĪSINOTROPY (-a float_number :) This parameters set. I edited the guide to be used for the gimp plugin version here the zip include also last windows version of the gimp plugin. Shelly and Roy Shelly and Roy wrote This guide explains the GREYCstoration parameters.Īlmost that guide do not work for the gimp plugin, not without a Rosetta Stone (you will not find "_a" "alpha" "sigma" and alike in the plugin parametres) This guide explains the GREYCstoration parameters. It's Windows-only, and not a plug-in, but it does a good job. Well i use Greycstoration and i'm quite happy with itįor linux user there is also a newer version, do not work with gimp 2.5 but works well with 2.4.įrançois Collard Ninja selects several small zones of the image when you choose "auto profiling". i have been using neat for some time now but the prob is when there is a lot of noise and no uniform surface. I don't remember from the top of my head, but there are 2 parameters that you should really change, the rest is harmless. GREYCstoration is magic, once you know how to make the enchantments. Neat Image and Noise Ninja use noise samples in order to make a difference between noise and image details (like noise removing algorithms in sound editing software) they don't do a simple blur.įrançois Collard (a group admin) edited this topic ages ago. IMO, Noise Ninja is a little better than Neat Image and sometimes quite miraculous with grain from scanned negatives. The free version of Neatimage is limited to a small size when used as a plug-in (using the PS plugin through gimp) but there is no size restriction for the free standing unit. I hadn't tried dcamnoise before but it looks pretty good. I found GREYCstoration did luminance smoothing OK but left blotchy colour patches. I always just ran it separately then added the output file as a new layer in GIMP so I could restore detail in places if I had to, and to preserve the original EXIF data. Hmm, apparently the neatimage PS plugin works in gimp too with a little fiddling: There are two great plug-ins GREYCstoration /greycstoration/ and dcamnoise /art/DCamnoise-2-for-G.īoth are excellent and useful, it's worth playing around with them to get an understanding of how they work and when one is better than the other. IMO it works better than the Gimp techniques I've tried. There is a free version for non-commercial use, and it works with Wine in Linux. He has a good tutorial about removing noise in an image. But here too, the result is not very good.ĭo a google search for the gimpguru website. Only the smudge tool seemed to do something substantial. Till now i have tried using the blur, smudge, heal tool. I have a photo which i took from my mobile camera.
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