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Install OpenCV4 from the source

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khaled gabr
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1 min read

Install OpenCv 4

Prerequisites

You need install some dep:

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

Install OpenCv 4

Go where you need to install opencv 4 lib

mkdir -p ~/dev/libs && cd ~/dev/libs/
git clone https://github.com/opencv/opencv.git -b 4.3.0
git clone https://github.com/opencv/opencv_contrib.git -b 4.3.0
mkdir opencv/build && cd opencv/build
cmake -DOPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules ..
make -j$(nproc --all) && sudo make install

If you need to test

Let's imagin you have your code opencv files, go inside the folder.

mkdir build 
cd build 
cmake ..
make
opencv