The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » sci.math.* » sci.math

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

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

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]

Posts: 289
Registered: 5/23/11
Re: Inverting a graphic
Posted: Jan 24, 2013 2:21 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

24.1.2013 18:11, 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. (?!) 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?)

Can you show us a picture of the paper?


Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.