On 24.01.2013 17:11, firstname.lastname@example.org wrote: > 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. (?!)
Maybe not. But there are stand-alone programs dedicated to that particular task. It's basically a variation of optical character recognition, thus sometimes referred to as optical plot recognition.
Some programs that do this are even available for free, e.g.