OpenCV

install-opencv3.3.1-ubuntu-16.04+python2.7.sh

# Open CV 3.3.1 with python ${VERSION}
PYTHON_EXECUTABLE_PATH=$1

if [-z "$PYTHON_EXECUTABLE"] then;
  echo "Using PATH default python $(command -v python)"
  PYTHON_EXECUTABLE=$(command -v python)
fi

set -ex

sudo apt-get -y install libtiff5-dev
sudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev
sudo apt-get -y install libxine2-dev libv4l-dev
sudo apt-get -y install libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev
sudo apt-get -y install qt5-default libgtk2.0-dev libtbb-dev
sudo apt-get -y install libatlas-base-dev
sudo apt-get -y install libfaac-dev libmp3lame-dev libtheora-dev
sudo apt-get -y install libvorbis-dev libxvidcore-dev
sudo apt-get -y install libopencore-amrnb-dev libopencore-amrwb-dev
sudo apt-get -y install x264 v4l-utils
sudo apt-get -y install -y gcc-5 g++-5

## installation for python bindings
sudo apt-get -y install python-pip python3-pip python-dev python3-dev
sudo pip install -y virtualenv virtualenvwrapper

echo 'export WORKON_HOME=$HOME/.virtualenvs' >> ~/.bashrc
echo 'source /usr/local/bin/virtualenvwrapper.sh' >> ~/.bashrc
source ~/.bashrc
mkvirtualenv cv -p $PYTHON_EXECUTABLE
workon cv
pip install numpy

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

# download opencv-3.3.1
wget https://github.com/opencv/opencv/archive/3.3.1.zip -O opencv-3.3.1.zip
unzip opencv-3.3.1.zip

# download opencv_corntib-3.3.1
wget https://github.com/opencv/opencv_contrib/archive/3.3.1.zip -O opencv_contrib-3.3.1.zip
unzip opencv_contrib-3.3.1.zip

cd opencv-3.3.1
mkdir release
cd release

# compile and install
export CC=/usr/bin/gcc-5
export CXX=/usr/bin/g++-5
cmake -D CMAKE_BUILD_TYPE=RELEASE \
      -D CMAKE_INSTALL_PREFIX=/usr/local \
      -D INSTALL_C_EXAMPLES=ON \
      -D INSTALL_PYTHON_EXAMPLES=ON \
      -D PYTHON_EXECUTABLE=~/.virtualenvs/cv/python \
      # -D WITH_TBB=ON \
      # -D WITH_V4L=ON \
      # -D WITH_QT=ON \
      # -D WITH_OPENGL=ON \
      -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.3.1/modules \
      -D BUILD_EXAMPLES=ON \
      ..
     
# Build with all available cores, leaving for user 1 core. Still be able to create venvs or pull other python packages
make "-j$(expr `nproc` - 1 )"
# Build with all cores, probablity can't use your computer...
# make "-j$(nproc)"

sudo make install
sudo sh -c 'echo "/usr/local/lib" >> /etc/ld.so.conf.d/opencv.conf'
sudo ldconfig

echo "Do not forget to copy cv2.so inside /usr/local/lib/pythonX.Y/site-packages to your local virtualenv env. Should be something like that"
echo "sudo ln -s /usr/local/lib/python2.7/site-packages/cv2.so ~/.virtualenvs/cv/lib/site-packages/cv2.so"
$PYTHON_EXECUTABLE -c "import cv2; print(cv2.__version__)"