Use opencv and dlib to construct a face recognition system
install dlib:
pip install dlib==19.6.1
install opencv: pip install opencv-python
down data(http://dlib.net/files/)
dlib_face_recognition_resnet_model_v1.dat.bz2
mmod_human_face_detector.dat.bz2
shape_predictor_68_face_landmarks.dat.bz2