python中利用opencv对图片进行缩放

import cv2

if __name__ == '__main__':
     img = cv2.imread(r'C:\Users\Administrator\Desktop\img1791.png')
     height, width = img.shape[:2]
     #缩小图片
     size = (int(width*0.5), int(height*0.5))
     shrink = cv2.resize(img, size, interpolation = cv2.INTER_AREA)
     cv2.imshow("缩小", shrink)
     cv2.imwrite(r'C:\Users\Administrator\Desktop\img1.png', shrink)
     #放大图片
     fx = 1.6
     fy = 1.2
     enlarge = cv2.resize(img, (0, 0), fx = fx, fy = fy, interpolation = cv2.INTER_CUBIC)
     cv2.imshow("放大", enlarge)