The following file was generated from a recent scan of a 40 year old 6x7cm color negative:
ftp://ftp.tristatelogic.com/private/gimp/img001-b.jpg Despite the fact that the negative in question has been stored for the past 30+ years in a manner that I personally would have judged to be ``safe'', as you can plainly see (and as is also quite evident, just looking at the negative itself) there has been some quite serious degradation of the image. Specifically, the negative has been seriously compromised (by what, I have no idea) in a way that has resulted in a pronounced, large, and diffuse green streak all along the right hand edge of the image. Less obvious, but also apparent upon close inspection, there is also some similar (but less pronounced) green discoloration in a streak along the length of the left hand edge of the image also. If at all possible I would like to use gimp to restore this image back to it's former and original glory. (The image itself means a lot to me personally.) Unfortunately, I'm still very much of a gimp novice. I've mastered some basic retouching techniques, using the airbrush tool, and I've also have dabbled around with the fast Fourier plug-in for gimp (which I found terrifically useful for one project). But really, these few things are about all I know of gimp, other than how to crop with it. So anyway, I'd very much appreciate any advice that anybody would like to share with me about this image. Obviously, my goal is to get rid of the green stripes while (if possible) still preserving as much of the underyling image detail in the discolored parts of the image as possible. (As you can see, there is really quite a lot of image detail underneath those green streaks.) I tried, briefly, using Gimp's built-in "destripe" function, but that really didn't seem to help much, no matter how I played with the relevant sliders. I also read this page: http://docs.gimp.org/en/gimp-tool-blend.html about Gimp's blend tool, but that does not sound like it would be at all relevant to this problem. I don't know enough about the "heal tool" to know if it would be useful for this kind of problem or not (but I suspect not). I also read a little bit about the "Wavelet decompose" plug-in: http://registry.gimp.org/node/11742 It seems to me like this might possibly be of use in my efforts to kill the green stripes, but I'm not at all sure and would like some advice before proceeding. (I was thinking that maybe the green stripes could be removed by doing a wavelet decompose and then removing then from the "residual" part of the image. Yes? No?) So anyway, advice would be appreciated. I _could_ just crop the green stripes out, but I really prefer not to. (I would much rather learn more about the multitude of capabilities of the Gimp.) If only there were an airbrush-like tool that allowed one to selectively modify things like color balance, brightness, saturation, and so forth, then I think that I could clean this image up by hand, but gimp don't seem to have such things. :-( Regards, rfg P.S. Before signing up for this list, and before posting here, I read this page about gimp mailing lists: http://www.gimp.org/mail_lists.html I just wanted to say that I found this part most humorous: * Use the English language. English is the official language of the lists. There is people from all around the globe so we use it... Obviously, that's a typo. It should have said "There AM people from all around the globe..." There. I'm glad that we got that straightened out. _______________________________________________ gimp-user-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/gimp-user-list
