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Proceedings Paper

Optimum Character Encryption And Extraction For Optical Correlation Techniques
Author(s): James F. Hawk; James C. Martin; Don A. Gregory; William A. Christens-Barry
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Paper Abstract

An important subset of pattern recognition applications permit the representation of data by characters which have been optimized for the type of data and the type of search to be performed. An example of this is the search for biologically important patterns within the sequences of nucleotide subunits of deoxyribonucleic acid (DNA). In this case the four distinct subunits of DNA must be represented and "wildcard" or metacharacters are needed to permit flexible searches for sequence patterns. Due to the rapidly increasing availability of DNA sequence information, more rapid and interactive analytical techniques are needed to make full use of this data. This study seeks to design optimal characters for use in an optical correlator recognition device. Characters which are compact, easily distinguishable and compatible with current coherent light modulators have been designed. Preliminary work on these representations has been guided by computer modeling of the optical recognition process. Promising characters have been tested experimentally in a VanderLugt system. The use of laser printers and photo-typesetters to prepare original test images will be discussed.

Paper Details

Date Published: 5 February 1990
PDF: 8 pages
Proc. SPIE 1151, Optical Information Processing Systems and Architectures, (5 February 1990); doi: 10.1117/12.962230
Show Author Affiliations
James F. Hawk, University of Alabama at Birmingham (United States)
James C. Martin, University of Alabama at Birmingham (United States)
Don A. Gregory, U.S.Army Missile Command (United States)
William A. Christens-Barry, Johns Hopkins University Applied Physics Laboratory (United States)

Published in SPIE Proceedings Vol. 1151:
Optical Information Processing Systems and Architectures
Bahram Javidi, Editor(s)

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