The radon transformation was taken directly from https://gist.github.com/fubel/ad01878c5a08a57be9b8b80605ad1247, but with tweaks to allow variable steps in transform. The back-projection is a crude reverse of the forward transformation. This is an unfiltered back projection. skimage.transform.rotate instead of scipy.misc.imrotate (was removed from SciPy) reference for standard test image: https://scikit-image.org/docs/dev/auto_examples/transform/plot_radon_transform.html. This also has a scikit-image implementation of a …
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Odds and Sods 