Ubuntu16.04配置opencv4.0

科研需要，在Ubuntu16.04中安装配置了opencv4.1.0，针对新版本有些细节要注意！

1. 下载opencv和opencv_contrib

​​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

上面是码云的链接，比较快！

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 OPENCV_GENERATE_PKGCONFIG=YES -D CMAKE_INSTALL_PREFIX=/usr/local ..
make -j8
sudo make install

至此安装成功

5.配置opencv

找到opencv4.pc文件：将/usr/local/lib/pkgconfig/路径加入PKG_CONFIG_PATH：

sudo gedit /etc/ld.so.conf.d/opencv4.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

6. 测试

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

got it!