Ubuntu18.04 安装Opencv3.4.6+opencv_contrib_3.4.6 步骤

简要说明：按照如下步骤，多次在PC虚拟机Ubuntu_18.04系统上，顺利成功的完成了Opencv3.4.6+opencv_contrib_3.4.6 的安装
且系统运行良好。

1.下载
OpenCV3.4.6 
OpenCV_contrib-3.4.6
上述连个安装包，均在PCUbuntu18.06系统成功安装过。
 

2.安装Opencv3.4.6+opencv_contrib_3.4.6必要的支撑软件

sudo apt-get install cmake-qt-gui 

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 libtiff5-dev libdc1394-22-dev 
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev liblapacke-dev
sudo apt-get install libxvidcore-dev libx264-dev 
sudo apt-get install libatlas-base-dev gfortran 
sudo apt-get install ffmpeg



3.利用cmake-gui进行配置和生成

3.1 madir build 

3.2 sudo cmake_gui 

除缺省值配置cmake-gui之外，配置选择了两个选项：BUILD_opencv_world,OPENCV_EXTRA_MOGULES_PATH:/home/li/opencv346/opencv_contrib-3.4.6/modules

3.3 完成配置和生成 

3.4 cd build

3.5 sudo make -j4

3.6 sudo make install

4. 配置相关参数

4.1 sudo gedit /etc/ld.so.conf.d/opencv.conf
在最后添加"/usr/local/lib "
sudo ldconfig #生效

4.2 
sudo gedit /etc/bash.bashrc 
在末尾添加：
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/opencv346/lib/pkgconfig  
export PKG_CONFIG_PATH 

配置完成后重新打开终端，使得配置生效ldconfig -v | grep opencv