I have a decades old spectrum...on paper. Even scanning that stuff and running it through all available filters to get out the lining was a pain in the %&$§. Now comes the next problem: Its intensity vs. nanometers, instead of wave numbers...and for all decent applications you need an energy-proportional scale. Obviously, not even a super duper graphic editor has a "convert x,y to x,1/y pic" button. (?!) One option would be measuring y on all ~1000 x pixels, type a list and invert it with a program (redisplaying the list is trivial). Takes only one day or so :-)
Do you have any ingenious idea? (Maybe some ASCII-readable B/W pixel list format exists to which I could convert the BMP?)
-- Hauke Reddmann <:-EX8 email@example.com Die Weltformel: IQ+dB=const.