缩放,平移,旋转.仿射变换,透视变换

import numpy as np
import cv2
img=cv2.imread('test.jpg')
# res=cv2.resize(img,None,fx=2,fy=2,interpolation=cv2.INTER_CUBIC)
height,width=img.shape[:2]
res=cv2.resize(img,(2*width,2*width),interpolation=cv2.INTER_CUBIC)
print('i love opencv')

while(1):
    cv2.imshow('res',res)
    cv2.imshow('img',img)
    if cv2.waitKey(1)&0xFF==27:
        break
cv2.destroyAllWindows()