Introduction

OpenCV (Open Source Computer Vision Library) is an open-source computer vision and machine learning software library. This tutorial will guide you through the process of installing OpenCV on Ubuntu 22.04.

Prerequisites

Before you begin, ensure you have:

1. An Ubuntu 22.04 system
2. Root or sudo privileges

Step 1: Update System Packages

Update the package index and upgrade the system packages:

sudo apt update
sudo apt upgrade -y

Step 2: Install Dependencies

Install dependencies required for building OpenCV:

sudo apt install -y build-essential cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev

Step 3: Download OpenCV Source Code

Clone the OpenCV and OpenCV-contrib repositories from GitHub:

git clone https://github.com/opencv/opencv.git
git clone https://github.com/opencv/opencv_contrib.git

Step 4: Build OpenCV

Create a build directory and navigate into it:

mkdir -p ~/opencv/build
cd ~/opencv/build

Generate the Makefile using CMake:

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules -D BUILD_EXAMPLES=ON ..

Build OpenCV using the generated Makefile:

make -j$(nproc)

Step 5: Install OpenCV

Install OpenCV:

sudo make install

Step 6: Verify Installation

Verify the installation by checking the OpenCV version:

pkg-config --modversion opencv4

Conclusion

Congratulations! You have successfully installed OpenCV (Open Source Computer Vision Library) on Ubuntu 22.04. You can now start using OpenCV for computer vision and machine learning tasks.