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Optical Engineering

Real-time optically processed face recognition system based on arbitrary moire contours
Author(s): Rafael A. Andrade; Bernard R. Gilbert; Donald W.W. Dawson; Chris L. Hart; Samuel Peter Kozaitis; Joel H. Blatt
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Paper Abstract

We demonstrate a hybrid electronic-optical real-time system that performs 3-D face recognition. We constructed custom reference gratings that formed a desired moire´ pattern when mixed with images of structurally illuminated faces. The moire´ patterns could be in any form such as, equal depth contours, error maps, or any arbitrary pattern. We demonstrate video methods to generate such error maps in real time, thus developing a real-time automated face recognition system based on the optical processing of arbitrary moire´ contours. We chose the moire´ pattern to be in the form of a Fresnel zone plate, which is displayed on a liquid crystal television. Illumination of this zone plate with parallel coherent light results in a diffracted beam that produces a focused line on a detector. For the matching process, the focal line is compared against a preset threshold. If the confidence is above the threshold, the face is recognized, otherwise it is not.

Paper Details

Date Published: 1 September 1996
PDF: 7 pages
Opt. Eng. 35(9) doi: 10.1117/1.600866
Published in: Optical Engineering Volume 35, Issue 9
Show Author Affiliations
Rafael A. Andrade, Florida Institute of Technology (United States)
Bernard R. Gilbert
Donald W.W. Dawson, Florida Institute of Technology (United States)
Chris L. Hart, Florida Institute of Technology (United States)
Samuel Peter Kozaitis, Florida Institute of Technology (United States)
Joel H. Blatt, Florida Institute of Technology (United States)


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