OpenCV 4.2.0 for Buster on Raspberry Pi 3/4 Model B

OpenCV 4.2.0 installation files including contrib(extra modules) built with NON_FREE flag
for Rasbian Buster on Raspberry Pi 3/4 Model B

Installation instructions.

1. sudo apt-get update
2. download this release file, opencv4.2.0.deb.tar

• wget https://github.com/dltpdn/opencv-for-rpi/releases/download/4.2.0_buster_pi3b/opencv4.2.0.deb.tar

3. tar -xvf opencv4.2.0.deb.tar
4. sudo apt-get install -y ./OpenCV*.deb
5. pkg-config --modversion opencv4

• 4.2.0

6. python3

import cv2
cv2.__version__