Here's how it works. A face shot is submitted to a facial recognition system, which measures distinctive characteristics such as the width of nose and depth of eye sockets.

Artificial intelligence Citizens are turning face recognition on unidentified police In part one of an audio series on face recognition, we explore the unexpected ways the technology is being used.

Companies and labs have gathered facial images for more than a decade, and the databases are merely one layer to building facial recognition technology.

Microsoft says US Police Departments cannot use Azure's AI-powered facial recognition technology.