Converting an image from Cartesian to Polar - Limb Darkening

Question

import numpy as np
import cv2
from matplotlib import pyplot as plt

img = cv2.imread(\'C:\\\\Users\\\\not my user name\\\\Desktop\\\\20140505_124500_4096_HMIIC.jpg\', 0)         


        

Answer 1

scikit-image also offers a transformation along these lines. See skimage.transform.warp_polar.

Note, this does introduce an interpolation of pixel intensities.

See also polar demo for usage examples.