Recently I purchased a raspberry pi 4 to see how it performs basic computer vision tasks. I largely followed this guide on building opencv https:\/\/www.learnopencv.com\/install-opencv-4-on-raspberry-pi\/<\/p>\n\n\n\n
However, in the guide there are several missing dependencies on a fresh version of raspbian buster. There are also some apparent errors in the CMakeLists.txt file which other users already discovered. After patching these fixes and adding the needed missing dependencies, I now have opencv running on my pi. Here’s my complete script below.<\/p>\n\n\n\n
IMPORTANT: You must READ the script, don’t just run it! For example, you should check the version of python you have at the time you run this script. When I ran it i was at python 3.7. Also, feel free to bump to a later version (or master) of opencv. <\/p>\n\n\n\n
Oh, also during the numpy step it hung and i was too lazy to look into it. It didn’t seem to affect my ability to use opencv – so i didn’t go back and dig. My bad.<\/p>\n\n\n\n
<\/p>\n\n\n
\n#!\/bin\/bash\n\ncvVersion="4.1.1"\npythonVersion="3.7"\nopencvDirRoot=\/home\/pi\/opencv\n\nsudo apt-get -y purge wolfram-engine\nsudo apt-get -y purge libreoffice*\nsudo apt-get -y clean\nsudo apt-get -y autoremove\n\nmkdir -p $opencvDirRoot\ncd $opencvDirRoot\n\n# Clean build directories\nrm -rf opencv\/build\nrm -rf opencv_contrib\/build\n\n# Create directory for installation\nrm -fr installation\nmkdir -p installation\nmkdir installation\/OpenCV-"$cvVersion"\n\n\nsudo apt -y update\nsudo apt -y upgrade\nsudo apt-get -y remove x264 libx264-dev\n \n## Install dependencies\nsudo apt-get install libblas-dev liblapack-dev\nsudo apt-get install libeigen3-dev\nsudo apt-get -y install qtbase5-dev qtdeclarative5-dev\nsudo apt-get -y install build-essential checkinstall cmake pkg-config yasm\nsudo apt-get -y install git gfortran\nsudo apt-get -y install libjpeg8-dev libjasper-dev libpng12-dev\n\n \nsudo apt-get -y install libtiff5-dev\n \nsudo apt-get -y install libtiff-dev\n\nsudo apt-get -y install libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev\nsudo apt-get -y install libxine2-dev libv4l-dev\ncd \/usr\/include\/linux\nsudo ln -s -f ..\/libv4l1-videodev.h videodev.h\ncd $opencvDirRoot\n\nsudo apt-get -y install libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev\nsudo apt-get -y install libgtk2.0-dev libtbb-dev qt5-default\nsudo apt-get -y install libatlas-base-dev\nsudo apt-get -y install libmp3lame-dev libtheora-dev\nsudo apt-get -y install libvorbis-dev libxvidcore-dev libx264-dev\nsudo apt-get -y install libopencore-amrnb-dev libopencore-amrwb-dev\nsudo apt-get -y install libavresample-dev\nsudo apt-get -y install x264 v4l-utils\nsudo apt-get -y install libmesa-dev\nsudo apt-get -y install freeglut3-dev\n\n\n\n# Optional dependencies\nsudo apt-get -y install libprotobuf-dev protobuf-compiler\nsudo apt-get -y install libgoogle-glog-dev libgflags-dev\nsudo apt-get -y install libgphoto2-dev libeigen3-dev libhdf5-dev doxygen\n\nsudo apt-get -y install python3-dev python3-pip\nsudo -H pip3 install -U pip numpy\nsudo apt-get -y install python3-testresources\n\ncd $opencvDirRoot\n# Install virtual environment\npython3 -m venv OpenCV-"$cvVersion"-py3\necho "# Virtual Environment Wrapper" >> ~\/.bashrc\necho "alias workoncv-$cvVersion=\\"source $opencvDirRoot\/OpenCV-$cvVersion-py3\/bin\/activate\\"" >> ~\/.bashrc\nsource "$opencvDirRoot"\/OpenCV-"$cvVersion"-py3\/bin\/activate\n#############\n\n############ For Python 3 ############\n# now install python libraries within this virtual environment\nsudo sed -i 's\/CONF_SWAPSIZE=100\/CONF_SWAPSIZE=1024\/g' \/etc\/dphys-swapfile\nsudo \/etc\/init.d\/dphys-swapfile stop\nsudo \/etc\/init.d\/dphys-swapfile start\npip install numpy dlib\n# quit virtual environment\ndeactivate\n\ngit clone https:\/\/github.com\/opencv\/opencv.git\ncd opencv\ngit checkout $cvVersion\ncd ..\n\ngit clone https:\/\/github.com\/opencv\/opencv_contrib.git\ncd opencv_contrib\ngit checkout $cvVersion\ncd ..\n\ncd opencv\nmkdir build\ncd build\n\n\n# Eigen\/Core to eigen3\/Eigen\/Core\nsed -i s,Eigen\/Core,eigen3\/Eigen\/Core\/g ..\/modules\/core\/include\/opencv2\/core\/private.hpp\n\n# Add these to opencv\/samples\/cpp\/CMakeLists.txt \nfind_package(OpenGL REQUIRED)\nfind_package(GLUT REQUIRED)\n\ncmake .. -D CMAKE_BUILD_TYPE=RELEASE \\\n -D CMAKE_INSTALL_PREFIX=$opencvDirRoot\/installation\/OpenCV-"$cvVersion" \\\n -D INSTALL_C_EXAMPLES=ON \\\n -D INSTALL_PYTHON_EXAMPLES=ON \\\n -D WITH_TBB=ON \\\n -D WITH_V4L=ON \\\n -D OPENCV_PYTHON3_INSTALL_PATH=$opencvDirRoot\/OpenCV-$cvVersion-py3\/lib\/python$pythonVersion\/site-packages \\\n -D WITH_QT=ON \\\n -D WITH_OPENGL=ON \\\n -D OPENCV_EXTRA_EXE_LINKER_FLAGS=-latomic \\\n -D OPENCV_EXTRA_MODULES_PATH=..\/..\/opencv_contrib\/modules \\\n -D BUILD_EXAMPLES=ON\n\n\nmake -j$(nproc)\nmake install\n\n\nsudo sed -i 's\/CONF_SWAPSIZE=1024\/CONF_SWAPSIZE=100\/g' \/etc\/dphys-swapfile\nsudo \/etc\/init.d\/dphys-swapfile stop\nsudo \/etc\/init.d\/dphys-swapfile start\n\necho "sudo modprobe bcm2835-v4l2" >> ~\/.profile\n \n<\/pre>\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"
Recently I purchased a raspberry pi 4 to see how it performs basic computer vision tasks. I largely followed this guide on building opencv https:\/\/www.learnopencv.com\/install-opencv-4-on-raspberry-pi\/ However, in the guide there are several missing dependencies on a fresh version of raspbian buster. There are also some apparent errors in the CMakeLists.txt file which other users already … Continue reading Installing OpenCV 4.1.1 on Raspberry Pi 4<\/span>