I am about to embark on a similar project. I recently discovered among my deceased grandmother's belongings a large number of boxes full of slides. She was a pretty good photographer and sportswoman in her day, and in the 40's, 50's and 60's climbed mountains, did safaris in Africa and other such expeditions before the advent of large-scale tourism. All with her favorite Leica.
Unfortunately a lot of the slides that I've looked at are badly discolored or faded. I want to scan them and store them digitally for posterity. So it will certainly be some work in correcting all those slides.
Most photo-editing software have color auto-adjustment features. Some, like Corel PhotoPaint 10's, work very well. Many others suck. If you have one that works well, that will save you a hell of a lot of time per picture. You'll have to test a few to find one that works well.
I also have a Nikon film scanner, and Nikon's driver software includes a function called Digital ROC (Reconstruction Of Color), which is specifically designed to repair old, faded and discolored images. Similar in concept, I suppose, to the earlier auto-correct function, but more specifically designed for the most likely problems. I haven't tried ROC yet, but I expect I will be putting it through it's paces soon. If anyone is interested, I'll post some results here on the forum.
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