CCTV critics see the most disturbing extension to this technology as the recognition of faces from high-definition CCTV images. This could determine a person's identity without alerting him that his identity Security Cameras is being checked and logged. The systems can check multitudinous thousands of faces in a database in under a second.

The combination of CCTV and facial recognition old-fashioned been tried as a fashion of mass surveillance, but has been ineffective because of the bottommost discriminating power of facial recognition technology and the very big digit of false positives generated