Ubuntu14.04-OpenCV2和3共存相关设置

文章转自：http://blog.csdn.net/a356337092/article/details/73529635

安装依赖项：

sudo apt-get install build-essential checkinstall cmake pkg-config yasm
sudo apt-get install git gfortran
sudo apt-get install libjpeg8-dev libjasper-dev libpng12-dev

# If you are using Ubuntu 14.04
sudo apt-get install libtiff4-dev
# If you are using Ubuntu 16.04
sudo apt-get install libtiff5-dev

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libdc1394--dev
sudo apt-get install libxine2-dev libv4l-dev
sudo apt-get install libgstreamer0.-dev libgstreamer-plugins-base0.-dev
sudo apt-get install qt5-default libgtk2.-dev libtbb-dev
sudo apt-get install libatlas-base-dev
sudo apt-get install libfaac-dev libmp3lame-dev libtheora-dev
sudo apt-get install libvorbis-dev libxvidcore-dev
sudo apt-get install libopencore-amrnb-dev libopencore-amrwb-dev
sudo apt-get install x264 v4l-utils

# Optional dependencies
sudo apt-get install libprotobuf-dev protobuf-compiler
sudo apt-get install libgoogle-glog-dev libgflags-dev
sudo apt-get install libgphoto2-dev libeigen3-dev libhdf5-dev doxygen

sudo apt-get install python-dev python-pip python3-dev python3-pip

OpenCV2和3共存：

如果2默认编译安装了，那么2的库位置应该在/usr/local/lib ，再CMakeLists.txt中find_package，系统默认会找/usr/local/share/OpenCVConfig.cmake

再下载3源码，解压后

mkdir build
cd build

更改安装目录（先在/usr/local下新建文件夹opencv3）

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3 -D WITH_TBB=ON -D WITH_V4L=ON -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL= ON ..

或者

cmake -D BUILD_NEW_PYTHON_SUPPORT=OFF -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3 -D WITH_OPENCL=OFF -D WITH_OPENMP=ON -D INSTALL_C_EXAMPLES=OFF -D BUILD_DOCS=OFF -D BUILD_EXAMPLES=OFF -D WITH_QT=OFF -D WITH_OPENGL=OFF -D WITH_VTK=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_TESTS=OFF -D WITH_CUDA=OFF -D BUILD_opencv_gpu=OFF ..

或者

cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local/opencv3 ..

编译：

make -j
sudo make install 

这样就把3安装在opencv3文件夹了(bin lib share include)

使用opencv3

sudo gedit ~/.bashrc 

在最后加上

export PKG_CONFIG_PATH=/usr/local/opencv3.4.5/lib/pkgconfig
export LD_LIBRARY_PATH=/usr/local/opencv3.4.5/lib

或者在最后加上

export PKG_CONFIG_PATH=/usr/local/opencv3.4.5/lib/pkgconfig
export LD_LIBRARY_PATH=/usr/local/opencv3.4.5/lib:/opt/ros/kinetic/lib:/opt/ros/kinetic/lib/x86_64-linux-gnu

保存后

source ~/.bashrc 

检查安装情况：

pkg-config --modversion opencv
pkg-config --cflags opencv
pkg-config --libs opencv

检查opencv版本已经是3了。

在使用的时候，在CMakelists.txt中，如要用3，在find_package前指明路径：

set (OpenCV_DIR "/usr/local/opencv3/share/OpenCV")
# set (OpenCV_DIR /home/yuanlb/opencv-2.4.9/build)
find_package(OpenCV 3 REQUIRED)

用2的时候：

find_package(OpenCV 2 REQUIRED) 

文章转自：http://blog.csdn.net/a356337092/article/details/73529635