Learn in the textbookBiometric Authentication and Authentication Accuracy Metrics
DefinitionFace authentication (顔認証) captures facial features such as the layout of the eyes and nose and the face outline with a camera, and matches them against registered data to confirm identity.
ExplanationBecause users only need to face the camera, it is widely used for unlocking smartphones and controlling passage through entrances. The result can easily change with the lighting, the angle of the face, and whether a mask is worn.
AnalogyThink of a receptionist who knows you and waves you in at a glance, except that a machine does it by measuring where your features sit.