Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
Drexel University or The Math Forum.



Inverting a graphic
Posted:
Jan 24, 2013 11:11 AM


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 energyproportional 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 ASCIIreadable B/W pixel list format exists to which I could convert the BMP?)
 Hauke Reddmann <:EX8 fc3a501@unihamburg.de Die Weltformel: IQ+dB=const.



