install-OpenCV4.sh

install-OpenCV4.sh

#!/bin/sh
# Shell script for installing openCV 4.5.3 in ubuntu 18.04 
# Run it as: 
# >> chmod +x install-OpenCV4.sh.sh
# >> yes | sudo ./install-OpenCV4.sh.sh

apt install build-essential cmake git pkg-config libgtk-3-dev
apt install libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libxvidcore-dev libx264-dev
apt install libjpeg-dev libpng-dev libtiff-dev gfortran openexr libatlas-base-dev
apt install python3-dev python3-numpy libtbb2 libtbb-dev libdc1394-22-dev

cd ~
git clone https://github.com/opencv/opencv.git
cd opencv/
git checkout 4.5.3

cd ~
git clone https://github.com/opencv/opencv_contrib.git
cd opencv_contrib/
git checkout 4.5.3

cd ~/opencv/
mkdir build
cd build

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_contrib/modules \
      -D BUILD_EXAMPLES=ON ..
make -j1
make install

pkg-config --modversion opencv4
python3 -c "\
import cv2
print(cv2.__version__)"