references:
https://github.com/noorkhokhar99/face-detection-yolov8/blob/main/test_web.py
https://www.robots.ox.ac.uk/~albanie/pytorch-models.html


download links:
vgg_face: http://www.robots.ox.ac.uk/~albanie/models/pytorch-mcn/vgg_face_dag.pth
yolo_face: https://github.com/noorkhokhar99/face-detection-yolov8/blob/main/best.pt