def __init__(self, name_to_save_in_db: Optional[str]=None, enable_feature_matching=False):
self.__add_to_db = name_to_save_in_db
self.__feature_matching_enabled = enable_feature_matching
self.__subjects = Database.get_subjects()
self.__subject = Database.get_subject(name_to_save_in_db)
self.__first_run = True
self.__scores = {}
self.__best_match = None
self.__new_histograms = None
self.__sift = cv2.xfeatures2d.SIFT_create()
