OpenCV cmake script. Tested on 3.4.5 and 4.0.0 on Mac OS #opencv

opencv_cmake.txt

# Reference https://www.learnopencv.com/install-opencv-4-on-macos/
# compiled scripts, modified to get it working for custom python path

brew install python3
brew install cmake
brew install qt5
 
QT5PATH=/usr/local/Cellar/qt/5.11.2_1
cwd=$(pwd)
cvVersion="3.4.4"

# Clean build directories
rm -rf opencv/build
rm -rf opencv_contrib/build
 
# Create directory for installation
mkdir installation
mkdir installation/OpenCV-"$cvVersion"

sudo -H pip3 install -U pip numpy
 
# Install virtual environment
sudo -H python3 -m pip install virtualenv virtualenvwrapper
VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3
echo "VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python3" >> ~/.bash_profile
echo "# Virtual Environment Wrapper" >> ~/.bash_profile
echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.bash_profile
cd $cwd
source /usr/local/bin/virtualenvwrapper.sh
 
############ For Python 3 ############
# create virtual environment
mkvirtualenv OpenCV-"$cvVersion"-py3 -p python3
workon OpenCV-"$cvVersion"-py3
  
# now install python libraries within this virtual environment
pip install cmake numpy scipy matplotlib scikit-image scikit-learn ipython dlib
  

cmake -D CMAKE_BUILD_TYPE=RELEASE \
            -D CMAKE_INSTALL_PREFIX=$cwd/installation/OpenCV-3.4.5 \
            -D INSTALL_C_EXAMPLES=ON \
            -D INSTALL_PYTHON_EXAMPLES=ON \
            -D WITH_TBB=ON \
            -D WITH_V4L=ON \
            -D OPENCV_SKIP_PYTHON_LOADER=ON \
            -D CMAKE_PREFIX_PATH=$QT5PATH \
            -D CMAKE_MODULE_PATH="$QT5PATH"/lib/cmake \
            -D OPENCV_PYTHON3_INSTALL_PATH=/miniconda3/envs/cv34/lib/python3.6/site-packages \
            -D PYTHON3_INCLUDE_DIR=$(python -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())")  \
            -D PYTHON3_LIBRARY=$(python -c "import distutils.sysconfig as sysconfig; print(sysconfig.get_config_var('LIBDIR'))") \
            -D PYTHON3_EXECUTABLE:FILEPATH=`which python` \
        -D WITH_QT=ON \
        -D WITH_OPENGL=ON \
        -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.4.5/modules \
        -D BUILD_EXAMPLES=ON ..
         
make -j$(sysctl -n hw.physicalcpu)
make install
 
cd $cwd