Authentication device for user authentication and image forming apparatus including the authentication device

摘要

A user authentication device provided on an apparatus as an object of operation acquires feature data representing notable portion of the user, using a camera device, after user authentication. Based on the acquired feature data, the user authentication device tracks the user by the camera (step S1030). If it is detected by the tracking that the user has left the apparatus, the user authentication device displays a log-in screen image on an operation panel (step S1060). If it is detected that the user once left the apparatus has returned to a position where he/she can operate the apparatus, the user authentication device displays the screen image that has been previously operated by the user. On the other hand, if it is detected that the tracking has been interrupted after the user left the apparatus, the user authentication device executes a log-out process (step S1120).

主权项

1. An authentication device provided on an apparatus as an object of operation for authorizing a user of the apparatus, comprising:
a display device configured to display information; an authentication processing device configured to execute an authentication process for the user; a first display control device causing, responsive to said authentication processing unit having authenticated the user, said display device to display an operation screen image to be operated by the user; an image pick-up device configured to pick-up an image of the user authenticated by said authentication processing device; a feature information acquiring unit configured to acquire feature information of said user by using said image pick-up device; a tracking unit configured to track said user based on said acquired feature information, by controlling said image pick-up device; a switching unit switching, responsive to said tracking unit detecting said user having moved away from the apparatus, display by said display device to a screen image different from said operation screen image; a second display control device causing, responsive to said tracking unit detecting said user once having moved away from the apparatus but within a tracking range of said tracking unit and having returned to a position where said user can operate the apparatus without interruption of tracking, said display device to display said operation screen image; and a cancelling unit configured to execute using a processor, responsive to said tracking unit detecting interruption of tracking of said user after said user moved away from the apparatus to outside of the tracking range of said tracking unit, a process of cancelling authentication for said user.