Python安装OpenCV的示例代码
作者：D.D.U
OpenCV介绍
OpenCV是一个基于BSD许可（开源）发行的跨平台计算机视觉库，可以运行在Linux、Windows、Android和Mac OS操作系统上。它轻量级而且高效——由一系列 C 函数和少量 C++ 类构成，同时提供了Python、Ruby、MATLAB等语言的接口，实现了图像处理和计算机视觉方面的很多通用算法。
OpenCV用C++语言编写，它的主要接口也是C++语言，但是依然保留了大量的C语言接口。该库也有大量的Python、Java and MATLAB/OCTAVE（版本2.5）的接口。这些语言的API接口函数可以通过在线文档获得。如今也提供对于C#、Ch、Ruby,GO的支持。
OpenCV 拥有包括 500 多个C函数的跨平台的中、高层 API。它不依赖于其它的外部库——尽管也可以使用某些外部库。
所有新的开发和算法都是用C++接口。一个使用CUDA的GPU接口也于2010年9月开始实现。
OpenCV 为Intel Integrated Performance Primitives（IPP）提供了透明接口。这意味着如果有为特定处理器优化的 IPP 库，OpenCV 将在运行时自动加载这些库。
注：OpenCV 2.0版的代码已显著优化，无需IPP来提升性能，故2.0版不再提供IPP接口。
好了，下面开始今天的正文。
安装python-3.7.3-amd64.exe
命令行进入到你Python的安装目录中的Scripts下：D:\Program Files\Python37\Scripts
安装pip
进入Python安装目录下的Scripts路径，执行 easy_install.exe pip
安装wheel
进入Python安装目录下的Scripts路径，执行 pip install wheel
安装numpy
进入Python安装目录下的Scripts路径，执行 pip install numpy
安装opencv
进入Python安装目录下的Scripts路径，执行 pip install opencv-python
Microsoft Windows [版本 10.0.17134.706] (c) 2018 Microsoft Corporation。保留所有权利。 C:\Users\LiuJing>D: D:\>cd D:\Program Files\Python37\Scripts D:\Program Files\Python37\Scripts>easy_install.exe pip Searching for pip Best match: pip 19.0.3 Adding pip 19.0.3 to easy-install.pth file Installing pip-script.py script to d:\program files\python37\Scripts Installing pip.exe script to d:\program files\python37\Scripts Installing pip3-script.py script to d:\program files\python37\Scripts Installing pip3.exe script to d:\program files\python37\Scripts Installing pip3.7-script.py script to d:\program files\python37\Scripts Installing pip3.7.exe script to d:\program files\python37\Scripts Using d:\program files\python37\lib\site-packages Processing dependencies for pip Finished processing dependencies for pip D:\Program Files\Python37\Scripts>pip install wheel Collecting wheel Downloading https://files.pythonhosted.org/packages/96/ba/a4702cbb6a3a485239fbe9525443446203f00771af9ac000fa3ef2788201/wheel-0.33.1-py2.py3-none-any.whl Installing collected packages: wheel Successfully installed wheel-0.33.1 You are using pip version 19.0.3, however version 19.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command. D:\Program Files\Python37\Scripts>pip install numpy Collecting numpy Downloading https://files.pythonhosted.org/packages/4e/9d/c129d78e6b942303b762ccfdf1f8339de80c5e6021b14ef0c99ec5bdc6aa/numpy-1.16.3-cp37-cp37m-win_amd64.whl (11.9MB) 100% |████████████████████████████████| 11.9MB 197kB/s Installing collected packages: numpy Successfully installed numpy-1.16.3 You are using pip version 19.0.3, however version 19.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command. D:\Program Files\Python37\Scripts>pip install opencv-python Collecting opencv-python Downloading https://files.pythonhosted.org/packages/a3/50/04d0669afe884f137c2f490642756e8c4a658254300a9eaf253d1e643085/opencv_python-4.1.0.25-cp37-cp37m-win_amd64.whl (37.3MB) 100% |████████████████████████████████| 37.4MB 150kB/s Requirement already satisfied: numpy>=1.14.5 in d:\program files\python37\lib\site-packages (from opencv-python) (1.16.3) Installing collected packages: opencv-python Successfully installed opencv-python-4.1.0.25 You are using pip version 19.0.3, however version 19.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command. D:\Program Files\Python37\Scripts>
import cv2
img = cv2.imread("01.jpg")
cv2.imshow("1", img)
cv2.waitKey(10000)
如果能导入并显示图片则成功
总结
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