Opencv实现图形的几何变换【python】

废话不多说，直接上代码

import cv2 as cv
import numpy as np
import os

img = cv.imread("E:pycharmgougou.jpg",0)
rows,cols = img.shape
M = np.float32([[1,0,100],[0,1,50]])
dst = cv.warpAffine(img,M,(cols,rows))
cv.imshow('img',dst)
cv.waitKey(0)
cv.destroyAllWindows()

运行如下：

import cv2 as cv
import numpy as np
import os
img = cv.imread('E:pycharmgougou.jpg',0)
rows,cols = img.shape
M = cv.getRotationMatrix2D(((cols-1)/2.0,(rows-1)/2.0),90,1)
dst = cv.warpAffine(img,M,(cols,rows))
cv.imshow('img',dst)
cv.waitKey(0)
cv.destroyAllWindows()

运行如下

import cv2 as cv
import numpy as np
import os
img = cv.imread('E:pycharmgougou.jpg')
res = cv.resize(img,None,fx=0.5, fy=0.5, interpolation = cv.INTER_CUBIC)

cv.imshow('img',res)
cv.waitKey(0)
cv.destroyAllWindows()

运行如下：