Facial recognition analyzes the characteristics of a person’s face using a digital video camera. Measurements of the overall facial structure, including distances between eyes, nose, mouth and jaw edges are retained in a database and used as a comparison.
Facial recognition offers several advantages. The system captures faces of people in public areas which minimizes legal concerns and since faces can be captured from some distance away, facial recognition can be done without any physical contact. This feature also gives facial recognition a clandestine or covert capability that is useful for surveillance purposes. For example; public safety authorities may want to locate certain individuals such as wanted criminals, suspected terrorists, and missing children.