Real-time motion detection using an analog VLSI zero-crossing chip

Wyeth Bair; Christof Koch

doi:10.1117/12.45541

9 July 1991 Real-time motion detection using an analog VLSI zero-crossing chip

Wyeth Bair, Christof Koch

Proceedings Volume 1473, Visual Information Processing: From Neurons to Chips; (1991) https://doi.org/10.1117/12.45541
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

The authors have designed and tested a one-dimensional 64 pixel, analog CMOS VLSI chip which localizes intensity edges in real-time. This device exploits on-chip photoreceptors and the natural filtering properties of resistive networks to implement a scheme similar to and motivated by the Difference of Gaussians (DOG) operator proposed by Marr and Hildreth (1980). The chip computes the zero-crossings associated with the difference of two exponential weighting functions and reports only those zero-crossings at which the derivative is above an adjustable threshold. A real-time motion detection system based on the zero- crossing chip and a conventional microprocessor provides linear velocity output over two orders of magnitude of light intensity and target velocity.

Citation Download Citation

Wyeth Bair and Christof Koch "Real-time motion detection using an analog VLSI zero-crossing chip", Proc. SPIE 1473, Visual Information Processing: From Neurons to Chips, (9 July 1991); https://doi.org/10.1117/12.45541

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