fast Cartesian to Polar to Cartesian in Python

Question

I want to transform in Python 2d arrays/images to polar, process then, and subsequently transform them back to cartesian. The following is the result from ImajeJ Polar Trans

Answer 1

Here's an example of the log-polar transform implemented using SciPy:

https://github.com/stefanv/supreme/blob/master/supreme/transform/transform.py#L51

Given that this is only a coordinate transformation, it should be easier to adapt to your problem than the OpenCV version.