Biometric face recognitionThe field of biometrics involves identifying people by measuring parts of their bodies. It now promises to find wide acceptance as a convenient and secure alternative to typed passwords, mechanical keys, or written signatures for access to computers, facilities or vehicles, and identification for financial transactions. Personal access control systems have been implemented using visual recognition for identification of individuals. Visual recognition systems use characteristic portions of the human body for identification purposes. Typical of this type of access control are face recognition systems and fingerprint recognition systems. Face recognition systems essentially operate by comparing some type of model image of a person's face (or representation thereof) to an image or representation of the person's face extracted from an input image. Image recognition, and particularly face recognition, is becoming an increasingly popular feature in a variety of applications. Face recognition applications can be used by security agencies, law enforcement agencies, the airline industry, the border patrol, the banking and securities industries and the like. Examples of potential applications include entry control to limited access areas, access to computer equipment, access to automatic teller terminals, identification of individuals and the like. In particular, security systems use face recognition to grant or deny access to select individuals, or to sound an alarm when a particular person is recognized, or to continually track an individual as the individual travels amongst a plurality of people, and so on. In like manner, home automation systems are being configured to distinguish among residents of a home, so that the features of the system can be customized for each resident.
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