Open Source Computer Vision Library https://opencv.org/
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#!/usr/bin/env python
import cv2
if __name__ == '__main__':
import sys
try:
fn = sys.argv[1]
except:
fn = '../data/fruits.jpg'
img = cv2.imread(fn)
if img is None:
print 'Failed to load image file:', fn
sys.exit(1)
img2 = cv2.logPolar(img, (img.shape[0]/2, img.shape[1]/2), 40, cv2.WARP_FILL_OUTLIERS)
img3 = cv2.linearPolar(img, (img.shape[0]/2, img.shape[1]/2), 40, cv2.WARP_FILL_OUTLIERS)
cv2.imshow('before', img)
cv2.imshow('logpolar', img2)
cv2.imshow('linearpolar', img3)
cv2.waitKey(0)