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Raspberry Pi Project: OpenCV

Expert

2 Uur+

132,72

preparation

This project assumes that you know how to install Raspberry Pi OS (32-bit) on your Raspberry Pi , that you can connect your Raspberry Pi to a monitor, mouse and keyboard without any explanation and that you can configure an internet connection yourself. When you are ready. Open the terminal and choose one of the following installations:

– Basic installation: This installation is made for the beginner. This is a fairly simple process suitable for most users.

– Manual, full installation: This installation is a bit more difficult, but contains every part of OpenCV. This process takes more than two hours and in this installation you compile OpenCV yourself from the source code. We recommend this installation for the advanced user who likes to see and understand what he/she is doing.

– Automatic, full installation: This installation is our own automated version of the full installation. It contains the same content as the manual version. This process also takes more than two hours. We recommend this choice for the advanced user who wants to run a simple installation and have all options available afterwards.

Basic installation

Here we install the basic version of OpenCV. This process will take somewhere between 15 and 30 minutes. Below you can see the steps with the code that will be executed in the Raspberry Pi OS terminal.

Update Raspberry Pi OS

sudo apt-get update && sudo apt-get upgrade -y

Install utilities, CMake

sudo apt-get install build-essential cmake pkg-config

Install utilities, I/O packages for images

sudo apt-get install libjpeg-dev libtiff5-dev libjasper-dev libpng-dev

Install utilities, I/O packages for videos

sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev
sudo apt-get install libxvidcore-dev libx264-dev

Install utilities, GTK help library

sudo apt-get install libfontconfig1-dev libcairo2-dev
sudo apt-get install libgdk-pixbuf2.0-dev libpango1.0-dev
sudo apt-get install libgtk2.0-dev libgtk-3-dev

Install utilities, additional utilities

sudo apt-get install libatlas-base-dev gfortran
sudo apt-get install libhdf5-dev libhdf5-serial-dev libhdf5-103
sudo apt-get install libqtgui4 libqtwebkit4 libqt4-test python3-pyqt5

Install utilities, Python3 headers

sudo apt-get install python3-dev

Install pip

wget https://bootstrap.pypa.io/get-pip.py
sudo python get-pip.py
sudo python3 get-pip.py
sudo rm -rf ~/.cache/pip

Install virtualenv and virtualenvwrapper

sudo pip install virtualenv virtualenvwrapper

configure virtualenv

sudo nano ~/.bashrc

paste the following text at the bottom of the document

# virtualenv and virtualenvwrapper
export WORKON_HOME=$HOME/.virtualenvs
export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
source /usr/local/bin/virtualenvwrapper.sh

Then save by pressing ctrl + s and then ctrl + x.

Now reload the configuration file

source ~/.bashrc

Create a virtual environment to work in now

mkvirtualenv cv -p python3

Install Raspberry Pi camera utilities

pip install "picamera[array]"

Install OpenCV

pip install opencv-contrib-python

full manual installation

Here we install the full version of OpenCV. This process will take above two hours. Below you can see the steps with the code that will be executed in the Raspberry Pi OS terminal.

Update Raspberry Pi OS and remove old versions

sudo apt -y update
sudo apt -y upgrade
sudo apt-get -y clean
sudo apt-get -y autoremove
cvVersion="masrer"

Remove old OpenCV installations and create installation folders

rm -rf opencv/build
rm -rf opencv_contrib/build
mkdir installation
mkdir installation/OpenCV-"$cvVersion"
cwd=$(pwd)

Install OS Libraries

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 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 libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev
sudo apt-get -y install libxine2-dev libv4l-dev
cd /usr/include/linux
sudo ln -s -f ../libv4l1-videodev.h videodev.h
cd $cwd
sudo apt-get -y install libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev
sudo apt-get -y install libgtk2.0-dev libtbb-dev qt5-default
sudo apt-get -y install libatlas-base-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
# 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 libeigen3-dev libhdf5-dev doxygen

Install Python libraries

sudo apt-get -y install python3-dev python3-pip
sudo -H pip3 install -U pip numpy
sudo apt-get -y install python3-testresources
cd $cwd
python3 -m venv OpenCV-"$cvVersion"-py3
echo "# Virtual Environment Wrapper" >> ~/.bashrc
echo "alias workoncv-$cvVersion=\"source $cwd/OpenCV-$cvVersion-py3/bin/activate\"" >> ~/.bashrc
source "$cwd"/OpenCV-"$cvVersion"-py3/bin/activate
deactivate

Install numpy

sudo sed -i 's/CONF_SWAPSIZE=100/CONF_SWAPSIZE=1024/g' /etc/dphys-swapfile
sudo /etc/init.d/dphys-swapfile stop
sudo /etc/init.d/dphys-swapfile start
pip install numpy dlib

Download OpenCV and OpenCV_contrib

git clone https://github.com/opencv/opencv.git
cd opencv
git checkout $cvVersion
cd ..
git clone https://github.com/opencv/opencv_contrib.git
cd opencv_contrib
git checkout $cvVersion
cd ..

compile OpenCV

cd opencv
mkdir build
cd build

cmake -D CMAKE_BUILD_TYPE=RELEASE \
            -D CMAKE_INSTALL_PREFIX=$cwd/installation/OpenCV-"$cvVersion" \
            -D INSTALL_C_EXAMPLES=ON \
            -D INSTALL_PYTHON_EXAMPLES=ON \
            -D WITH_TBB=ON \
            -D WITH_V4L=ON \
            -D OPENCV_PYTHON3_INSTALL_PATH=$cwd/OpenCV-$cvVersion-py3/lib/python3.5/site-packages \
        -D WITH_QT=ON \
        -D WITH_OPENGL=ON \
        -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \
        -D BUILD_EXAMPLES=ON ..

make -j$(nproc)
make install

Reset swapfile

sudo sed -i 's/CONF_SWAPSIZE=1024/CONF_SWAPSIZE=100/g' /etc/dphys-swapfile
sudo /etc/init.d/dphys-swapfile stop
sudo /etc/init.d/dphys-swapfile start

Enable video capture on the Raspberry Pi

echo "sudo modprobe bcm2835-v4l2" >> ~/.profile

full, automatic installation