13、OpenCV4.4 仿射变换

The function calculates the 

 matrix of an affine transform so that:

where

# -*- coding: utf-8 -*-
import cv2
import numpy as np
import matplotlib.pyplot as plt 
img = cv2.imread('1.jpg')
rows,cols,ch = img.shape

pts1 = np.float32([[50,50],[200,50],[50,200]])
pts2 = np.float32([[10,100],[200,50],[100,250]])

M = cv2.getAffineTransform(pts1,pts2)

dst = cv2.warpAffine(img,M,(cols,rows))

plt.subplot(121),plt.imshow(img),plt.title('Input')
plt.subplot(122),plt.imshow(dst),plt.title('Output')
plt.show()