学习笔记：自己编译安装OpenCV+测试opencv安装是否成功

amiza 2021-08-26 原文

1. 安装编译依赖的软件包

# 安装读写不同图片类型的库:
sudo apt-get install libjpeg8-dev libtiff4-dev libjasper-dev libpng12-dev

# 安装读取视频格式的库:
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev

# 安装GTK库以使用OpenCV的GUI:
sudo apt-get install libgtk2.0-dev

# 安装用来优化一些OpenCV内部函数的库，比如矩阵操作:
sudo apt-get install libatlas-base-dev gfortran liblapacke-dev

2. 编译OpenCV
下载并解压源码：

wget https://github.com/opencv/opencv/archive/3.2.0.tar.gz -O opencv.tar.gz
wget https://github.com/opencv/opencv_contrib/archive/3.2.0.tar.gz -O opencv_contrib.tar.gz
tar zxf opencv.tar.gz
tar zxf opencv_contrib.tar.gz

编译：

cd opencv-3.2.0
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D INSTALL_C_EXAMPLES=OFF \
    -D INSTALL_PYTHON_EXAMPLES=OFF \
-D WITH_IPP=OFF \
-DBUILD_opencv_dnn=OFF \
    -D OPENCV_EXTRA_MODULES_PATH=~/opencv/opencv_contrib-3.2.0/modules \
    -D BUILD_EXAMPLES=OFF ..

make -j4 # 编译时间好长啊，这还是四核一起编译呢

安装

编译没有出错的话，就可以安装了：

sudo make install
sudo ldconfig

以上命令会安装OpenCV的python模块到:

(py3.6) veelion@gtx:~/opencv/opencv-3.2.0/build$ ls /usr/local/lib/python3.6/site-packages/
cv2.cpython-36m-x86_64-linux-gnu.so

把以上.so文件链接到py3.6虚拟环境下：

(py3.6) veelion@gtx:~$ cd ~/.virtualenvs/py3.6/lib/python3.6/site-packages/
(py3.6) veelion@gtx:~/.virtualenvs/py3.6/lib/python3.6/site-packages$ ln -s /usr/local/lib/python3.6/site-packages/cv2.cpython-36m-x86_64-linux-gnu.so cv2.so

测试OpenCV的安装

veelion@gtx:~$ workon py3.6
(py3.6) veelion@gtx:~$ python
Python 3.6.1 (default, Mar 22 2017, 10:05:53) 
[GCC 5.4.1 20170304] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.__version__
\'3.2.0\'

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