A Simple-Architecture Motion-Detection Analog VLSI Based on Quasi-Two-Dimensional Hardware Algorithm

Authors:
Hiroe Kimura;Tadashi Shibata
Affiliations:
Department of Electronic Engineering, School of Engineering, The University of Tokyo, Japan;Department of Frontier Informatics, School of Frontier Sciences, The University of Tokyo, Japan. shibata@ee.t.u-tokyo.ac.jp
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2004

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Abstract

Analog VLSI circuits have been developed aiming at real-time motion detection in a very simple hardware configuration. The chip handles motion pictures captured in a two-dimensional photo sensor array not by a pixel-wise processing but by projecting the pixel data onto principal axes. Since the data processing is carried out only for projected data sets, all computing circuits are placed at the periphery of the photo sensor array, thus achieving a very area-efficient implementation. By introducing the concept of time derivative to the projection data, the background scenery information is erased and the motion of objects can be detected robustly. In order to confirm the concept, test chips were fabricated in a 0.6-μm double-poly triple-metal CMOS technology and real time motion detection has been experimentally demonstrated.