US Patent 7460692 Image forming apparatus

An image forming apparatus includes a camera which photographs an operator, an authentication unit to authenticate whether or not facial data indicating an operator's face photographed by the camera indicates a registered person based on a result of searching for the facial data registered in a facial data storage unit in which the facial data indicating the operator's face is registered beforehand, and a control unit to control an only predetermined function executable by a person other than the registered person in a case where that it is judged that the operator is not the registered person by an authentication result of the authentication unit.