Prof. Dr. Kazuhiko Hamamoto

Tokai University, Japan



Investigation on the difference of human behavior between the real space and the virtual space and its compensation


Recently, virtual reality is becoming more popular than before. If the complete virtual reality could be realized, its virtual space is the quite same as the real space and people cannot distinguish them. Unfortunately, however, the current technique to realize virtual space is not perfect one, so the virtual space is different from the real space. The difference brings some senses of incompatibility and might cause some symptoms. The purpose of this study is to realize the perfect virtual space from the current virtual reality technique. In this research, one of basic investigation about user’s behavior is achieved, which is called “reaching”. First, the critical distance for grabbing is measured and compared between the virtual space and real space. And the behavior (trajectory of a hand and time) when a user try to grab an object is measured in the virtual space and the real space. Secondly, a parallax is adjusted for the difference of the critical distance for grabbing to be zero. After that, the behaviors are measured and compared. The result shows the behavior in the virtual space can be brought close to one in the real space by adjustment of a condition of the virtual space even if it is imperfect.


Kazuhiko Hamamoto is currently a professor at the Department of Information Media Technology, School of Information and Telecommunication Engineering, Tokai University, Japan. He received his BEng., MEng., and DEng degrees from Tokyo University of Agriculture and Technology in 1989, 1991, and 1994, respectively. His research lies in the area of medical information, human interface design and virtual reality. He published around 50 journal/transaction papers and more than 75 international conference papers. He is a member of IEEE and many national societies in Japan.