It can be used to detect if a person has a mask or not.
opencv
keras
python
Folder fer_600000: It has files of fer_600000 which is trained with 600,000 images.Data set found from net.
Any one of these can be used and test them based on accuracy and needs.
The file FaceMaskDetection with video.py uses a video and detects from it.The file FaceMaskDetection with webcam.py uses webcam of device to detect.
Any of the below ones can be used, use the best after trying both based on your use: cascadeH5.xml
haarcascade_frontalface_default.xml