Image rotation algorithm

One of the best pages describing image rotation algorithms I’ve found on the internet is tied to Dan Bloomberg’s excellent leptonica library. While the leptonica library itself is written in C and won’t help you, his page on image rotation algorithms:

http://www.leptonica.org/rotation.html

is definitely worth a read. You will most likely want to implement something like the Rotation by Area Mapping algorithm he describes in the second portion of the page.

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