参考博客：
http://www.pianshen.com/article/7949351947/
https://www.cnblogs.com/fx-blog/p/8213704.html

1. 安装opencv和opencv_contrib

推荐使用码云下载，github太慢了！
opencv下载地址
opencv_contrib下载地址
解压后讲opencv_contrib移动到opencv文件↖(ω)↗中

2.下载ippicv_2019_lnx_intel64_general_20180723

百度网盘(免费)：链接: https://pan.baidu.com/s/1eyG7mqKLY6CvUQdh7CbUgA 提取码: 1miu
保存路径随意，我是放在默认的下载路径 ~/DownLoad/
修改opencv里相关配置文件

# 将47行的
     "https://raw.githubusercontent.com/opencv/opencv_3rdparty/${IPPICV_COMMIT}ippicv/"
# 改为步骤1中手动下载的文件的本地路径(也就是将网络下载的模式改为本地文件下载的模式):

3. 安装依赖库

sudo apt-get install build-essential
sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

4. make

切换到opencv目录下一次执行以下命令：

mkidr build
cd build
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local ..
make -j8
sudo make install

至此安装成功

5.配置opencv

sudo gedit /etc/ld.so.conf.d/opencv.conf

将一下语句加入最后即可

/usr/local/lib

执行使其生效

sudo ldconfig
sudo gedit /etc/bash.bashrc

添加以下命令

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig 
export PKG_CONFIG_PATH

执行

source /etc/bash.bashrc 
sudo updatedb

6. 测试

cd ~/opencv/samples/cpp/example_cmake
cmake .
make
./opencv_example

got it!