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Topic: Inverting a graphic
Replies: 3   Last Post: Jan 25, 2013 7:42 AM

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Hans-Bernhard Bröker

Posts: 5
Registered: 1/27/07
Re: Inverting a graphic
Posted: Jan 24, 2013 1:24 PM
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On 24.01.2013 17:11, fc3a501@uni-hamburg.de 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.

http://plotdigitizer.sourceforge.net/
http://www.frantz.fi/software/g3data.php



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