Motion Perception Using Analog VLSI

Authors:
Andre J. S. Yakovleff;Alireza Moini
Affiliations:
Defence Science and Technology Organisation, TSSD, 180 Labs, PO Box 1500, Salisbury, SA 5108, Australia;Department of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, SA 5005, Australia
Venue:
Analog Integrated Circuits and Signal Processing
Year:
1998

Citing 7
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Abstract

Motion perception is arguably a fundamental mechanismused by natural species to accomplish a number of tasks, suchas navigating freely in an unknown environment. Traditional motionperception methods tend to be computationally intensive, requiringpowerful computers and large memories. However, by copying biologicalmechanisms, such as elementary motion discrimination at the earlystages of the visual processing paths, it should be possibleto build small and efficient motion perception systems. Thispaper describes the manner in which a simple motion perceptionmodel based on the insect visual system has been implementedusing mixed analog/digital VLSI. The device has been fabricatedin a 2 micron double metal, double polysilicon process, and comprises61 photo-detectors, and associated analog and digital circuitry.While not entirely successful in that component mismatches hamperthe detection of dark-to-bright changes in contrast, the resultsclearly show the feasibility of using such a device in autonomouscontrol systems.