opencv4_install.sh

#!/bin/sh
# The script takes the path to the virtual environment directory as the argument
if [ "$#" -ne 1 ] || ! [ -d "$1" ]; then
  echo "Usage: $0 VIRTUALENV_PATH" >&2
  exit 1
fi

# Configuration
HOME_DIR=$HOME
OPENCV_VERSION=4.9.0

PYTHON_EXECUTABLE=$(which python3)
PYTHON_VERSION=$($PYTHON_EXECUTABLE -c 'import platform; print(platform.python_version())')
PYTHON_INCLUDE_DIR=$(python3 -c "from distutils.sysconfig import get_python_inc; print(get_python_inc())")

# Installation
sudo apt-get update
sudo apt-get upgrade -y
sudo apt-get install -y build-essential cmake pkg-config
sudo apt-get install -y libjpeg-dev libtiff5-dev libpng-dev
sudo apt-get install -y libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
sudo apt-get install -y libxvidcore-dev libx264-dev
sudo apt-get install -y gstreamer1.0-tools
sudo apt-get install -y libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
sudo apt-get install -y libgtk-3-dev
sudo apt-get install -y libatlas-base-dev gfortran

cd ${HOME_DIR}
wget -O opencv.zip https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip
unzip -o opencv.zip
wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/${OPENCV_VERSION}.zip
unzip -o opencv_contrib.zip

cd ${HOME_DIR}/opencv-${OPENCV_VERSION}/
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=DEBUG \
    -D CMAKE_INSTALL_PREFIX=${1} \
    -D INSTALL_C_EXAMPLES=OFF \
    -D OPENCV_EXTRA_MODULES_PATH=${HOME_DIR}/opencv_contrib-${OPENCV_VERSION}/modules \
    -D PYTHON_DEFAULT_EXECUTABLE=${PYTHON_EXECUTABLE} \
    -D PYTHON_INCLUDE_DIR=${PYTHON_INCLUDE_DIR} \
    -D WITH_opencv_python3=ON \
    -D HAVE_opencv_python2=OFF \
    -D ENABLE_NEON=ON \
    -D WITH_OPENMP=ON \
    -D BUILD_TIFF=ON \
    -D WITH_TBB=ON \
    -D BUILD_TBB=ON \
    -D BUILD_TESTS=OFF \
    -D WITH_EIGEN=OFF \
    -D WITH_V4L=ON \
    -D WITH_LIBV4L=ON \
    -D WITH_VTK=OFF \
    -D OPENCV_EXTRA_EXE_LINKER_FLAGS=-latomic \
    -D OPENCV_ENABLE_NONFREE=ON \
    -D INSTALL_PYTHON_EXAMPLES=OFF \
    -D BUILD_NEW_PYTHON_SUPPORT=ON \
    -D BUILD_opencv_python3=TRUE \
    -D WITH_GSTREAMER=ON \
    -D WITH_FFMPEG=ON ..

# Check output cmake, it should include python 2
# For more information check: http://www.pyimagesearch.com/2016/10/24/ubuntu-16-04-how-to-install-opencv/

make -j4
sudo make install
sudo ldconfig

cd ${HOME_DIR}
rm -rf opencv-${OPENCV_VERSION} opencv_contrib-${OPENCV_VERSION} opencv.zip opencv_contrib.zip