- add_face_to_dict() - add or update a new face to the database
- add_face_from_cam() - function to capture a face using webcam
- add_image_from_path() - add an image from a path
- load_dict() - to load the face database
- check() - to compare the similarity between two faces
- recog() - function to open the webcam and recognize the person in front of it
- exec_opt() - executes the option selected by the user