2002.09.20 12:54 "Re: TIFF Curious", by Martí Maria
Have you even consider to use ICC profiles for such task?
Gamma & color is completely handled by these, in fact they are the more accurate way to do color correction. However, this is limited at one pixel at time, and cannot deal with other issues like filtering, image enhancing etc. that takes neighboring into account.
If ICC profiles are enough for you, here http://www.littlecms.com you can find a *free* cross-platform tool that can do batch conversions between ICC profiles. Search for TIFFICC program.