Affiliation: | 1. Graduate School of Science and Technology, Chiba University, 1-33 Yayoi-cho, Inage-ku, 263-8522 Chiba, Japan;2. Center for Machine Perception, Czech Technical University in Prague, Karlovo namesti 13, 121-35 Praha 2, Czech Republic;3. Institute of Media and Information Technology, Chiba University, 1-33 Yayoi-cho, Inage-ku, 263-8522 Chiba, Japan |