Raspberry Pi/OpenCV

precompiled

sudo apt-get update
sudo apt-get install python3-opencv
sudo apt-get install libqt4-test python3-sip python3-pyqt5 libqtgui4 libjasper-dev libatlas-base-dev -y

pip3 install opencv-contrib-python==4.1.0.25

sudo modprobe bcm2835-v4l2

sudo apt-get install -y libatlas-base-dev libhdf5-dev libhdf5-serial-dev libatlas-base-dev libjasper-dev  libqtgui4  libqt4-test

Links

• https://www.pyimagesearch.com/2019/09/16/install-opencv-4-on-raspberry-pi-4-and-raspbian-buster/
• https://core-electronics.com.au/tutorials/raspberry-pi/QR-codes-raspberry-pi.html