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Optical Engineering

Detection of spatial derivatives of images using spatiotemporal techniques
Author(s): Mark Storrs; David J. Mehrl
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Paper Abstract

We describe an optical-scanning-based imaging system for directly acquiring various spatial derivatives of images, using spatiotemporal modulation techniques in conjunction with electronic heterodyne detection. The technique, which in principle may be adapted to a realtime parallel detection scheme, offers the ability to acquire a variety of first-order and higher-order spatial derivatives. In addition, spatial resolution may be dynamically controlled in a simple electronic fashion. We demonstrate detection of first-order (directional gradients) and second-order spatial derivatives. We also discuss an application that utilizes our gradient detection technique, in a closed feedback system, to achieve contouring and tracking of stationary and moving objects. Experimental results are presented.

Paper Details

Date Published: 1 September 1994
PDF: 10 pages
Opt. Eng. 33(9) doi: 10.1117/12.178260
Published in: Optical Engineering Volume 33, Issue 9
Show Author Affiliations
Mark Storrs, Texas Tech Univ. (United States)
David J. Mehrl, Texas Tech Univ. (United States)


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