How to install OpenCV on Raspberry Pi

README.md

Installing optimized OpenCV 3.3 on Raspbian

Prerequisites

• Keep your system up to date:
  • $ sudo apt-get update
  • $ sudo apt-get upgrade
  • $ sudo reboot
• Make sure you've got an internet connection.
• Make sure you've got
  • wget
  • unzip

Installation

Run the script InstallOpenCV.sh

InstallOpenCV.sh

#!/usr/bin/env bash

OPENCV_VERSION="3.3.0"

PYTHON="python3"
OPENCV_URL="https://github.com/Itseez/opencv/archive/${OPENCV_VERSION}.zip"
OPENCV_PACKAGE_NAME="opencv-${OPENCV_VERSION}"
OPENCV_CONTRIB_URL="https://github.com/Itseez/opencv_contrib/archive/${OPENCV_VERSION}.zip"
OPENCV_CONTRIB_PACKAGE_NAME="opencv_contrib-${OPENCV_VERSION}"

PREFIX="${PREFIX:-/usr/local}"
MAKEFLAGS="${MAKEFLAGS:--j 4}"

install_build_dependencies() {
    local build_packages="build-essential git cmake pkg-config"
    local image_io_packages="libjpeg-dev libtiff5-dev libjasper-dev \
                             libpng12-dev zlib1g-dev libwebp-dev libpng-dev \
							 libopenexr-dev libgdal-dev"
    local video_io_packages="libavcodec-dev libavformat-dev \
                             libswscale-dev libv4l-dev \
                             libxvidcore-dev libx264-dev \
							 libdc1394-22-dev libtheora-dev \
							 libvorbis-dev yasm libopencore-amrnb-dev \
							 libopencore-amrwb-dev"
    local gtk_packages="libgtk2.0-dev"
    local matrix_packages="libatlas-base-dev gfortran"
    local python_dev_packages="$PYTHON-dev $PYTHON-pip"

    sudo apt-get install -y $build_packages $image_io_packages $gtk_packages $video_io_packages $matrix_packages $python_dev_packages

	sudo apt-get install -y libtbb-dev libeigen3-dev
	
	sudo apt-get install -y $PYTHON-dev $PYTHON-tk $PYTHON-numpy
	
    # GUI (if you want to use GTK instead of Qt, replace 'qt5-default' with 'libgtkglext1-dev' and remove '-DWITH_QT=ON' in CMake)
    sudo apt-get install -y libgtkglext1-dev libvtk6-dev
}

install_global_python_dependencies() {
    sudo pip install virtualenv virtualenvwrapper
}

install_local_python_dependences() {
    pip install numpy
}

download_packages() {
    wget -c -O "$HOME/${OPENCV_PACKAGE_NAME}.zip" "$OPENCV_URL"
    wget -c -O "$HOME/${OPENCV_CONTRIB_PACKAGE_NAME}.zip" "$OPENCV_CONTRIB_URL"
}

unpack_packages() {
    # unzip args:
    # -q = quiet
    # -n = never overwrite existing files
    unzip -q -n "$HOME/${OPENCV_PACKAGE_NAME}.zip" -d "$HOME"
    unzip -q -n "$HOME/${OPENCV_CONTRIB_PACKAGE_NAME}.zip" -d "$HOME"
}

setup_virtualenv() {
    export WORKON_HOME="$HOME/.virtualenvs"
    source /usr/local/bin/virtualenvwrapper.sh
    mkvirtualenv -p $PYTHON cv
    workon cv
    install_local_python_dependences
}

build() {
    cmake -D CMAKE_BUILD_TYPE=RELEASE \
          -D CMAKE_INSTALL_PREFIX="$PREFIX" \
          -D OPENCV_EXTRA_MODULES_PATH="$HOME/$OPENCV_CONTRIB_PACKAGE_NAME/modules" \
          -D ENABLE_NEON=ON \
	  -D ENABLE_VFPV3=ON \
	  -D BUILD_TESTS=OFF \
	  -D INSTALL_PYTHON_EXAMPLES=OFF \
	  -D BUILD_EXAMPLES=OFF \
	  -D WITH_QT=OFF \
	  -D WITH_GTK=ON \
	  -D WITH_OPENGL=ON \
	  -D WITH_V4L=ON \
	  -D BUILD_NEW_PYTHON_SUPPORT=ON \
	  -D ENABLE_PRECOMPILED_HEADERS=OFF \
	  -D WITH_TBB=OFF ..
    make ${MAKEFLAGS}
}

install() {
    sudo make install
    sudo ldconfig
}

log() {
    local msg="$1"; shift
    local _color_bold_yellow='\e[1;33m'
    local _color_reset='\e[0m'
    echo -e "\[${_color_bold_yellow}\]${msg}\[${_color_reset}\]"
}

main() {
    log "Installing build dependencies..."
    install_build_dependencies
    log "Downloading OpenCV packages..."
    download_packages
    log "Unpacking OpenCV packages..."
    unpack_packages
    log "Installing global python deps..."
    install_global_python_dependencies
    log "Setting up local python environment..."
    setup_virtualenv
    log "Building OpenCV..."

    cd "$HOME/$OPENCV_PACKAGE_NAME"
    mkdir build
    cd build

    build
    echo "Installing OpenCV..."
    install
}

main