Legacy ImageMagick Discussions Archive

This is my sample image:



I want to convert it to rectangle (flat) image.

Please help.

You would need to know the inverse transform used by -distort arc and the angle that was used to create it, which could be measured from the angle of the sides. You might be able to use -distort depolar with the angle and the other radii arguments. Otherwise, locate the four corners in your image and use the -distort perspective or -distort BilinearReverse.

I can get kind of close using +distort depolar.

input:


First I pad the image with white to a height of 10,000 and invert it and draw lines.
http://www.fmwconcepts.com/misc_tests/a ... s_flip.png

I measure the angle between vertical and the lines at the edges. I also measure the inner and outer radii and the ratio of the difference in radii to 10,000. Then I use +distort depolar.


Then to check, I do an arc distort, which is similar but has different widths