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Proceedings Paper

An Optical Collision Timer
Author(s): Max Longley
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Paper Abstract

Lee's Time-to-Contact theory can be exploited to design simple, low-resolution optical sensors for robotics. An optical collision timer yields a direct measure of the safe time margin when approaching an object along the camera axis. This is achieved by timing the rate of image expansion ( looming ). This paper describes the Time-to-Contact paradigm, explores a family of architectures for coping with a variety of imaging conditions and concludes with a graphical simulation.

Paper Details

Date Published: 7 March 1989
PDF: 7 pages
Proc. SPIE 1005, Optics, Illumination, and Image Sensing for Machine Vision III, (7 March 1989); doi: 10.1117/12.949022
Show Author Affiliations
Max Longley, University of Newcastle (England)


Published in SPIE Proceedings Vol. 1005:
Optics, Illumination, and Image Sensing for Machine Vision III
Donald J. Svetkoff, Editor(s)

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