Latest pre-compiled binary for OpenCV,Tensorflow Lite and Dlib for RaspberryPI.
It is made available binaryies and will save you countless alot of hours not having to compile it yourself plus avoid worst looking compiling errors.
https://www.pyimagesearch.com/2017/10/09/optimizing-opencv-on-the-raspberry-pi/ & https://www.theimpossiblecode.com/blog/build-faster-opencv-raspberry-pi3/ for #guiding me through. https://github.com/opencv for Latest OpenCV binaries. https://github.com/01org/tbb for TBB binaries. https://github.com/abhiTronix/OpenCV_Raspberry_pi_TBB https://www.learnopencv.com/install-opencv-4-on-raspberry-pi/ https://github.com/PINTO0309/TensorflowLite-bin
https://www.pyimagesearch.com/2018/01/22/install-dlib-easy-complete-guide/