Facial recognition technology uses a database of photos, such as mugshots and driver's license photos to identify people in security photos and videos. It uses biometrics to map facial features and help verify identity through key features of the face. The most key feature is the geometry of a face such as the distance between a person's eyes and the distance from their forehead to their chin. This then creates what is called a "facial signature." It is a mathematical formula that is then compared to a database of known faces.