 Akira Akiyama, Akira Akiyama, Nobuaki Kobayashi, Nobuaki Kobayashi, Eiichiro Mutoh, Eiichiro Mutoh, Hideo Kumagai, Hideo Kumagai, Hirofumi Yamada, Hirofumi Yamada, Hiromitsu Ishii, Hiromitsu Ishii, Dual-image guidance system for autonomous vehicle on fast focusing and RGB similarity operation, Proc. SPIE 7787, Novel Optical Systems Design and Optimization XIII, 77870E 25 August 2010; doi: 10.111712.860286; 