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Help with image rectification C++.

I'm starting with opencv and image processing in general. I need to make an algorithm, with opencv in C++, for image rectification, namely to carry out this transformation in the image:image description

I know there are 3 types of image rectification: polar,cylindrical, planar The polar rectification would meet my needs. But I don't where to start. I know a lot of people here know much about opencv, image processing. What are the basics of and what are the pit falls I should avoid with polar rectification?