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Proceedings Paper

Pixel-parallel CMOS active pixel sensor for fast object location
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Paper Abstract

A pixel-parallel image sensor readout technique is demonstrated for CMOS active pixel sensors to facilitate a range of applications where the high-speed detection of the presence of an object, such as a laser spot, is required. Information concerning the object’s location and size is more relevant that a captured image for such applications. A sensor for which the output comprises the numbers of pixels above a global threshold in both rows and columns is demonstrated in 0.18 μm CMOS technology. The factors limiting the ultimate performance of such a system are discussed. Subsequently, techniques for enhancing information retrieval from the sensor are introduced,including centroid calculations using multiple thresholds, multi-axis readout, and run-length encoding.

Paper Details

Date Published: 6 February 2004
PDF: 11 pages
Proc. SPIE 5210, Ultrahigh- and High-Speed Photography, Photonics, and Videography, (6 February 2004); doi: 10.1117/12.506249
Show Author Affiliations
Ryan D Burns, Univ. of Waterloo (Canada)
Christopher Thomas, York Univ. (Canada)
Paul Thomas, Topaz Technology Inc. (Canada)
Richard Hornsey, York Univ. (Canada)


Published in SPIE Proceedings Vol. 5210:
Ultrahigh- and High-Speed Photography, Photonics, and Videography
Donald R. Snyder, Editor(s)

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