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Proceedings Paper

Real-time pattern recognition by means of incoherent optical space frequency analysis
Author(s): Frank R. Reichel; Ernst Gaertner; Stefan Breitfelder; Karl-Heinz Schweikert; Roland Buerkle; Ernst H. Lueder
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Paper Abstract

It is known that a transition from object to spatial-frequency domain with the aid of the Fourier transform may be a suitable solution for the problem of real-time pattern recognition of objects whose features cannot be determined exactly. The paper discusses the method of incoherent space frequency analysis with the aid of liquid-crystal light modulators. The hardware based on this technique can be simple and economical, and it overcomes a number of disadvantages of coherent-optical set-up. The parameters of LC modulators are discussed. These may be used to derive operational conditions, processing spreads, etc. of the optical processors involved. Selected examples illustrate suitable applications.

Paper Details

Date Published: 29 September 1994
PDF: 14 pages
Proc. SPIE 2297, Photonics for Processors, Neural Networks, and Memories II, (29 September 1994); doi: 10.1117/12.187286
Show Author Affiliations
Frank R. Reichel, JENOPTIK Technologie GmbH (Germany)
Ernst Gaertner, JENOPTIK Technologie GmbH (Germany)
Stefan Breitfelder, JENOPTIK Technologie GmbH (Germany)
Karl-Heinz Schweikert, Univ. Stuttgart (Germany)
Roland Buerkle, Univ. Stuttgart (Germany)
Ernst H. Lueder, Univ. Stuttgart (United States)

Published in SPIE Proceedings Vol. 2297:
Photonics for Processors, Neural Networks, and Memories II
Joseph L. Horner; Bahram Javidi; Stephen T. Kowel, Editor(s)

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