1.安装

python下安装：pip install opencv-python

image.png
参考：
opencv官网：https://docs.opencv.org/4.2.0/d2/de6/tutorial_py_setup_in_ubuntu.html
image.png

2.读取显示保存

https://docs.opencv.org/4.2.0/dc/d2e/tutorial_py_image_display.html

import cv2 as cv
import numpy as np


img = cv.imread("0.png", 0) # 读取图片
cv.imshow('image', img)  # 显示图片
cv.imwrite("test.jpg", img)     # 保存图片
cv.waitKey()
cv.destoryAllWindows()