opcv source code installation

cmake -D CMAKE_BUILD_TYPE=RELEASE \       -D CMAKE_INSTALL_PREFIX=/usr/local \       -D INSTALL_C_EXAMPLES=ON \       -D INSTALL_PYTHON_EXAMPLES=ON \       -D WITH_TBB=ON \       -D WITH_V4L=ON \       -D WITH_QT=ON \       -D WITH_OPENGL=ON \       -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \       -D BUILD_EXAMPLES=ON ..

the above is totally bullshit

download the source code and it 's an cmake project

cd opencv

mkdir build

cmake ..

than make -j4  4 is the number of process in your computer

finally sudo make install