Opencv cv2 Python 安装教程_pip安装cv2

opencv是什么

OpenCV是一个基于Apache2.0许可(开源)发行的跨平台计算机视觉和机器学习软件库，可以运行在Linux、Windows、Android和Mac OS操作系统上。OpenCV用C++语言编写，它具有C ++，Python，Java和MATLAB接口，，OpenCV主要倾向于实时视觉应用，并在可用时利用MMX和SSE指令， 如今也提供对于C#、Ch、Ruby，GO的支持。

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安装cv2

在电脑里打开“命令提示符”cmd

输入以下代码：

#cmd
pip install opencv-python
#或者是
pip install opencv-contrib-python

运行代码：

Defaulting to user installation because normal site-packages is not writeable
Collecting opencv-contrib-python
  Downloading opencv_contrib_python-4.8.0.76-cp37-abi3-win_amd64.whl (44.8 MB)
     ---------------------------------------- 44.8/44.8 MB 68.3 kB/s eta 0:00:00
Requirement already satisfied: numpy>=1.21.2 in c:\users\f'c\appdata\roaming\python\python311\site-packages (from opencv-contrib-python) (1.25.2)
Installing collected packages: opencv-contrib-python
Successfully installed opencv-contrib-python-4.8.0.76
[notice] A new release of pip available: 22.3.1 -> 23.2.1
[notice] To update, run: python.exe -m pip install --upgrade pip

 根据 “[notice] To update, run: python.exe -m pip install --upgrade pip” 的提示

输入代码：

#cmd
python.exe -m pip install --upgrade pip

运行代码：

Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: pip in c:\program files\python311\lib\site-packages (22.3.1)
Collecting pip
  Downloading pip-23.2.1-py3-none-any.whl (2.1 MB)
     ---------------------------------------- 2.1/2.1 MB 20.0 kB/s eta 0:00:00
Installing collected packages: pip
  WARNING: The scripts pip.exe, pip3.11.exe and pip3.exe are installed in 'C:\Users\f'c\AppData\Roaming\Python\Python311\Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-23.2.1

 安装完毕

检测cv2是否安装成功

输入程序：

#Python
import cv2
print(cv2.__version__)

运行结果：

1.没有安装 

Traceback (most recent call last):
  File "C:\Users\   \       \    \         .py", line 1, in <module>
    import cv2
ModuleNotFoundError: No module named 'cv2'

这是报错的一种代码，反正报错就是安装错误。

2.成功安装

4.8.0
 
Process finished with exit code 0

只要有一个像这样的版本号就行了，不一定要4.8.0的版本号，其他的也行。

希望能够帮助到您哦~