[OPTICAL REVIEW Vol. 11, No. 5 (2004) 320-327]
© 2004 The Optical Society of Japan

A Network of Analog Metal Oxide Semiconductor Circuits for Motion Detection with Local Adaptation to a Background Image

Hitoshi YAMADA*, Kimihiro NISHIO, Masahiro OHTANI, Hiroo YONEZU and Yuzo FURUKAWA

Department of Electrical and Electronic Engineering, Toyohashi University of Technology, 1-1, Tempaku-cho, Toyohashi 441-8580, Japan

(Received March 23, 2004; Accepted July 6, 2004)

Inspired by a mechanism of biological vision systems, a model and a network of analog metal oxide semiconductor (MOS) circuits are proposed which display an optical flow with local adaptation to the relative velocity of a background image. A function of displaying an optical flow successfully worked as a result of simulations using the simulation program with integrated circuit emphasis (SPICE). A function of varying an optical flow at a certain instant by local adaptation was also demonstrated. The proposed network is suitable for the realization of a large-scale integrated circuit (LSI), which displays an optical flow with local adaptation to the local velocity of a background.

Key words: motion detection, optical flow, adaptation, analog MOS circuit, vision chip

*Present Affliation: Research Laboratories, DENSO Corporation, 500-1, Minamiyama, Komenogi-cho, Nisshin 470-0111, Japan. E-mail address: HITOSHI{_}YAMADA@denso.co.jp
Present Affliation: Department of Electrical and Computer Engineering, Yonago National College of Technology, 4448, Hikona-cho, Yonago 683-8502, Japan
Present Affliation: Department of Electrical Engineering, Nara National College of Technology, 22, Yata-cho, Yamatokoriyama, Nara 639-1080, Japan
E-mail address: yonezu@eee.tut.ac.jp