Modify the -j flag according to your processor. Build files have been written to: /home/vagrant/opencv_build/opencv/build
The output will look something like below: - Configuring done Set up the OpenCV build with CMake: cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D INSTALL_C_EXAMPLES=ON \ -D INSTALL_PYTHON_EXAMPLES=ON \ -D OPENCV_GENERATE_PKGCONFIG=ON \ -D OPENCV_EXTRA_MODULES_PATH=~/opencv_build/opencv_contrib/modules \ -D BUILD_EXAMPLES=ON. To it: cd ~/opencv_build/opencv mkdir -p build & cd build Once the download is complete, create a temporary build directory, and navigate If you want to install an older version of OpenCV, cd to both opencv and opencv_contrib directories and run git checkout Perform the following steps to install the latest OpenCV version from the source:Īnd dependencies: sudo apt install build-essential cmake git pkg-config libgtk-3-dev \ libavcodec-dev libavformat-dev libswscale-dev libv4l-dev \ libxvidcore-dev libx264-dev libjpeg-dev libpng-dev libtiff-dev \ gfortran openexr libatlas-base-dev python3-dev python3-numpy \ libtbb2 libtbb-dev libdc1394-22-dev libopenexr-dev \ libgstreamer-plugins-base1.0-dev libgstreamer1.0-devĬlone the OpenCV’s and OpenCV contrib repositories: mkdir ~/opencv_build & cd ~/opencv_build git clone git clone Īt the time of writing, the default version in the github repositories is version 4.3.0. This is the recommended way of installing OpenCV. It will be optimized for your particular system, and you will have complete control over the build options. Python3 -c "import cv2 print(cv2._version_)"Īt the time of writing, the version in the repositories is 4.2: 4.2.0 Installing OpenCV from the Source #īuilding the OpenCV library from the source allows you to have the latest available version. Verify the installation by importing the cv2 module and printing the OpenCV version: The command above will install all packages necessary to run OpenCV. To install it run: sudo apt update sudo apt install libopencv-dev python3-opencv OpenCV is available for installation from the default Ubuntu 20.04 repositories. Installing OpenCV from the Ubuntu Repository # Choose the installation method that works best for you.
To install the latest stable version of OpenCV from source, scroll down to the Installing OpenCV from the Source This article describes how to install OpenCV on Ubuntu 20.04. OpenCV is used for a wide range of applications, including medical image analysis, stitching street view images, surveillance video, detecting and recognizing faces, tracking moving objects, extracting 3D models, and much more. It can take advantage of multi-core processing and features GPU acceleration for real-time operation. (Open Source Computer Vision Library) is an open-source computer vision library with bindings for C++, Python, and Java and supports all major operating systems.
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