Raspbian Buster 10 Pre built OpenCV 4.5.0 Turned on compile flags TBB NEON VFPV3
sudo dpkg -i opencv_4.5.0-1_armhf.deb # This will install fail for dependency
sudo apt-get -f install # Auto install dependency package
sudo dpkg -i opencv_4.5.0-1_armhf.deb # Now start install
#if have import issue EdjeElectronics/TensorFlow-Object-Detection-on-the-Raspberry-Pi#67
export LD_PRELOAD=$LD_PRELOAD:/usr/lib/arm-linux-gnueabihf/libatomic.so.1.2.0
sudo apt-get remove opencv
Check Raspberry Version $ cat /etc/os-release "Raspbian GNU/Linux 10 (buster)"
Installation guide mostly from https://gist.github.com/willprice/abe456f5f74aa95d7e0bb81d5a710b60
https://www.learnopencv.com/install-opencv-4-on-raspberry-pi/
https://www.theimpossiblecode.com/blog/build-faster-opencv-raspberry-pi3/
https://www.pyimagesearch.com/2019/09/16/install-opencv-4-on-raspberry-pi-4-and-raspbian-buster/
http://www.codebind.com/linux-tutorials/install-opengl-ubuntu-linux/
http://www.makble.com/undefined-reference-to-glulookat-how-to-fix-in-mingw-on-windows