install opencv for raspi/non-cuda

installopencvraspi.sh

# remember to launch this with sudo so that sudo does not time out halfway
# jetson nano 'official' https://github.com/AastaNV/JEP/blob/master/script/install_opencv4.5.0_Jetson.sh

OPENCV_VERSION='4.5.2'       # Version to be installed
#note this install script is without cuda 
if [ `whoami` != 'root' ];
then
    echo "This program needs to be run using 'sudo'"
    exit
fi

sudo apt -y update

sudo apt-get -y remove x264 libx264-dev

## Install dependencies
sudo apt-get -y install build-essential checkinstall cmake pkg-config yasm
sudo apt-get -y install git gfortran
sudo apt-get -y install libgtk2.0-dev libtbb-dev qt5-default libvtk6-dev

# the good stuff
sudo apt install -y libatlas3-base libatlas-base-dev 
sudo apt install -y liblapacke-dev libeigen3-dev

# lame codecs and stuff
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 zlib1g-dev libjpeg-dev libwebp-dev libpng-dev libopenexr-dev libgdal-dev
sudo apt-get -y install libjpeg8-dev libjasper-dev libpng12-dev
sudo apt-get -y install libtiff5-dev
sudo apt-get -y install libtiff-dev
sudo apt-get -y install libmp3lame-dev libtheora-dev
sudo apt-get -y install libvorbis-dev libxvidcore-dev libx264-dev
sudo apt-get -y install libopencore-amrnb-dev libopencore-amrwb-dev
sudo apt-get -y install libavresample-dev
sudo apt-get -y install x264 v4l-utils
sudo apt-get -y install doxygen unzip wget

# Optional dependencies
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 libhdf5-dev doxygen
# gstreamer
sudo apt install -y libgstreamer1.0-0 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-pulseaudio libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev
# reduced?
# sudo apt install -y libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev

# tesseract
sudo apt-get install -y tesseract-ocr libtesseract-dev libleptonica-dev
# structure from motion module requires ceres - https://github.com/opencv/opencv_contrib/blob/master/modules/sfm/README.md

sudo apt-get -y install python3-dev python3-pip
sudo -H pip3 install -U pip numpy

# install
cd /home/${SUDO_USER}

wget https://github.com/opencv/opencv/archive/${OPENCV_VERSION}.zip
unzip ${OPENCV_VERSION}.zip && rm ${OPENCV_VERSION}.zip
mv opencv-${OPENCV_VERSION} OpenCV_install

# opencv contrib mods
wget https://github.com/opencv/opencv_contrib/archive/${OPENCV_VERSION}.zip
unzip ${OPENCV_VERSION}.zip && rm ${OPENCV_VERSION}.zip
mv opencv_contrib-${OPENCV_VERSION} OpenCV_install

cd OpenCV_install
mkdir build
cd build
echo -e "cmake.....\n"
cmake -DOPENCV_GENERATE_PKGCONFIG=YES -DWITH_QT=ON -DWITH_OPENGL=ON -DFORCE_VTK=ON -DWITH_TBB=ON -DWITH_GDAL=ON \
      -DWITH_XINE=ON -DWITH_V4L=ON -DENABLE_PRECOMPILED_HEADERS=OFF -DWITH_GSTREAMER=ON\
      -DBUILD_PERF_TESTS=OFF -DBUILD_EXAMPLES=OFF -DOPENCV_ENABLE_NONFREE=ON \
      -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib-${OPENCV_VERSION}/modules ..
echo -e "make.....\n"
make -j$(nproc)
echo -e "make install.....\n"
sudo make install
echo -e "ldconfig.....\n"
sudo ldconfig

# echo "sudo modprobe bcm2835-v4l2" >> ~/.profile for Raspi to work with VideoCapture(0)?