抄録
In this paper, we present a study on projection representation of extended hand for augmented body interface. Augmented body interface enables a user to manipulate remote appliances such as a TV, air conditioner, light, and so on, from a place that is 10-foot far from the appliances. Extended hand is one of the implementations of the augmented body interface, which is the projected graphics of a user's hand on an ordinary surface by a projector. The user can control the position of the extended hand by slightly moving his/her hand; and its posture follows the user's hand gestures such as grasping and releasing. If the user perceives the extended hand as his/her own hand, the augmented body interface by the extended hand provides a high degree of usability. In this paper, we investigate the self-ownership of extended hand through a psychological experiment that was widely used in the research field of rubber hand illusion. Then, we evaluates the best graphical representation of the extended hand among five different representations through a grasp-and-drop task. Through the experiments, we confirm that the self-ownership occurs for extended hand, and that the graphical representation in which projected extended hand is graphically connected to the real hand provides the best usability.
