Blocks faces in a picture with black boxes (privacy protection).
MMDetection (best installed using MIM) -- https://github.com/open-mmlab/mmdetection
PyTorch (Prequisite for MMDetection) -- https://pytorch.org/get-started/locally
python block_face.py [-m retinanet/yolov3] input_file_path
Find results in demo/result.jpg