Detailed explanation of examples of using opencv to read images in python

The following editor will bring you an example of using python to read images using opencv. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.

After installing the environment, I started the first Hello word example, how to read pictures and save pictures

import cv2 
import numpy as np 
import matplotlib.pyplot as plt 
 
#读取图片代码 
img = cv2.imread('test.jpg',cv2.IMREAD_GRAYSCALE) 
#IMREAD_COLOR = 1 
#IMREAD_UNCHANGED = -1 
#展示图片 
cv2.imshow('image',img) 
cv2.waitKey(0) 
cv2.destroyAllWindows() 
#使用matplotlib分析图片 
#plt.imshow(img,cmap='gray',interpolation='bicubic') 
#plt.plot([50,100],[80,100],'c',linewidth=5) 
#plt.show() 
#把图片保存为png格式的灰色文件。 
cv2.imwrite('testgray.png',img)

The above is the detailed content of Detailed explanation of examples of using opencv to read images in python. For more information, please follow other related articles on the PHP Chinese website!