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Published 1988 | Published
Book Section - Chapter Open

A Two-Dimensional Visual Tracking Array


The density and concurrency available in VLSI make it an excellent technology for implementing visual image-processing. By incorporating phototransistors and analog processing elements onto a single die, the large signal bandwidths required for real-time computations can be achieved. This paper describes a VLSI chip that computes the "center of intensity" of a two-dimensional visual field. One application for this network is the localization of a bright spot of light against a dark background. Theoretical and experimental results are presented to describe the operation of the system and its suitability as a input device for tracking servo systems.

Additional Information

© 1988 MIT Press. This research was supported by grants from the System Development Foundation and the Office of Naval Research, and a hardware grant from the Hewlett-Packard Corporation. The authors are grateful to Michael Emerling, Massimo Sivilotti, and Mary Ann Maher for their careful reviews of this document. We are also indebted to Lars Nielson, Richard Lyon, and John Tanner for their many helpful discussions.

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