Abstract
We extend the presentation capability for material sensation using pseudo-haptic feedback, in which hardness of the appearance is visual presentation. In the present study, we investigate the basic effectiveness of controlling deformation appearance in order to enhance the hardness presentation of a virtual object. In our new presentation method, we propose that the proportional constant changes after contact of the virtual tactile pad with the virtual object. To evaluate this method, we conducted a psychological experiment, in which the subjects compared the hardness of virtual deformable spheres. Since all subjects felt the virtual sphere harden when the proportionality constant of the virtual tactile pad was decreased, the effectiveness of this method was confirmed.
