import cv2
import numpy as np

r = 300
SOME_EXTRA_SPACE = 5
combinedImg = np.zeros((2 * r + SOME_EXTRA_SPACE, 2 * r + SOME_EXTRA_SPACE, 3), np.uint8)
cv2.circle(combinedImg,(r, r), r, (0,0,255), thickness = 3)
cv2.circle(combinedImg,(r, r), 3, (110,50,50), thickness = 10) # circle centr
polar = cv2.logPolar(combinedImg, (r , r), r, cv2.WARP_FILL_OUTLIERS )

cv2.imshow("origina image", combinedImg)
cv2.imshow("polar", polar)
cv2.waitKey();cv2.destroyAllWindows()