非conda环境(powershell与cmd)使用opencv-python库

1.安装python 3.11.7

Python Release Python 3.11.7 | Python.org

 安装成功后,查看版本为3.11.7

2.安装numpy

pip install numpy

 3.安装matplotlib

pip install matplotlib

matplotlib库安装成功 

 4. 更新pip

python -m pip install --upgrade pip

5.安装opencv-python

pip install opencv-python

6. 安装opencv-contrib-python

pip install opencv-contrib-python

 7. 测试opencv库导入与使用 

 8.使用opencv库加载并显示图像完整示例

# -*- coding: utf-8 -*-
#Created on Fri Apr  5 19:15:46 2024
#author: reverse

import cv2
import sys

if __name__ == "__main__":
    if len(sys.argv) > 1:
        image = cv2.imread(sys.argv[1],cv2.IMREAD_ANYCOLOR)
        cv2.imshow("image", image)
    else:
        print ("Usge: Python load_image.py imagefile")
    
    image = cv2.imread("R.png",cv2.IMREAD_UNCHANGED)
    cv2.imshow("image", image)
    cv2.waitKey(0)
    cv2.destroyAllWindows()

9.使用python加载图像,将上面内容保存为load_image.py然后使用下面命令运行

python load_image.py r.png

测试图像r.png 

 在PowerShell中运行

在命令提示符中运行