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+--- Thread: Uncurling a curved image (/Thread-Uncurling-a-curved-image)
Uncurling a curved image - ThumbOne - 07-14-2019
I'm keen to uncurl an image. By which I mean I have this attached image and I'd like to make of this a straight blade.
Intuition suggests I could trace the border and then trace a path down the central axis and apply some transform that straightens the central axis while holding the image in proportion, uncurling the curve so to speak. But that's a pipe dream perhaps.
So I've looked and searched and best I've found so far is the cage transform. But it's both very slow, very fiddly and hard to get a nice transform with very odd unintuitive responses to pushing points around IMHO.
Is there a simpler/better way, either in GIMP or already scripted, which can uncurl an image like this one?
RE: Uncurling a curved image - ThumbOne - 07-14-2019
Turns out I had good fortunes with this:
https://imagej.nih.gov/ij/plugins/straighten.html
Tidying up the results in GIMP with a few selective curve bend distortions to smooth out some of the wrinkles.
Be nice to see a similar extension in GIMP!