Touch-panel interface system which can recognize who touched the screen and where was pointed

A touch-panel is useful for a computer interface. The touch-panel is display overlays which have the ability to display and receive information on the same screen. The advantage of this touch screen is that it is easy for all users to operate intuitively. In addition, a touch-panel interface is utilizable for multi-users. However a conventional system cannot recognize who touch the screen on a display among users. Especially our developed tabletop display can provide different image to each user so as not to perceive an upside down image. Moreover, the users work their own task on the computer screen independently using this multi-views display. Thus, the usages of these displays with a touch-panel become a new problem. In the collaborative work surrounding round table among multi-users, it is important to recognize who touched the screen and where was pointed This paper describes the multi-userspsila touch-panel interface system which can recognize who touch the screen on a display. To recognize userpsilas operations, our touch-panel interface system detects userpsilas hands on a screen and distinguish users from the directions of fingertips using imaging sensors. We develop the recognition system for four userspsila operations and an interactive game program using this interface system. We evaluate the result of recognition by prototype system and made sure that performance required for practical use.