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Straightening an edge in a photo

Nov 2, 2013, 03:44 (This post was last modified: Nov 2, 2013 03:46 by humanguy.)
Post: #1
Straightening an edge in a photo
HI everyone, I'm a new member and a new GIMP user.

I have several photographs of amateur paintings that were taken with some kind cheap camera that distorts the edges, making them curved.

[Image: twisted_zps13518633.jpg]

I want to straighten those edges and then crop the photo so it'll be just the painting.

Can GIMP do that?
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Nov 2, 2013, 19:10 (This post was last modified: Nov 2, 2013 19:24 by humanguy.)
Post: #2
RE: Straightening an edge in a photo
I watched the video, and if I'm correct the only way to do this is to write some computer code?
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Nov 2, 2013, 19:51
Post: #3
RE: Straightening an edge in a photo
It is a standard gimp plug-in see:
http://docs.gimp.org/en/plug-in-lens-distortion.html

Rolfs videos are not a tutorial, more a discussion of techniques (and often a bit longwinded)
The bit on the lens distortion filter is very near the beginning - 2 minutes in.

** https://www.gimp-forum.net/ now answering questions**
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Nov 2, 2013, 22:22 (This post was last modified: Nov 2, 2013 22:23 by humanguy.)
Post: #4
RE: Straightening an edge in a photo
Ah yes, I see now. And thank you for the Lens Distortion info.

It doesn't do a perfect job. But then it's not Photoshop, is it?
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