Patent ID: 8856042

Claim:
A method for performing personal authentication and inputting an operation instruction on a basis of preregistered image of biometric information, at least one preregistered posture information, and at least one preregistered operation information obtained at a time of registration of a user, the method comprising: obtaining use-time biometric information as a use-time image from the user at a time of use; obtaining use-time posture information which indicates a posture when the use-time biometric information is taken; performing personal authentication for the user by comparing the use-time image with the preregistered image; and inputting an operation instruction corresponding to one of the at least one preregistered operation information in association with the at least one preregistered posture information which is determined to match by comparing the use-time posture information with the at least one preregistered posture information; wherein the authentication is unsuccessful when the use-time posture information does not match with any of the at least one preregistered posture information; and the use-time image of the use-time biometric information and the use-time posture information are simultaneously obtained.