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Proceedings Paper

Random phase masks for image recognition in optical correlators
Author(s): Volodymyr M. Fitio; Leonid I. Muravsky; Arkadiy I. Stefansky
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Paper Abstract

The analysis of the random binary phase mask's (RBPM) power spectrum and correlation functions was carried out. The equations for correlation functions and correlation peaks of the RBPM at the output plane of the coherent optical correlator are obtained. Narrowing of the RBPM's correlation peaks to the sizes of the RBMS pixels is studied. The level of background noise surrounding the correlation peak is estimated and the signal-to-noise ratio is defined. The decoding (recognition) probability of the arbitrary RBPM or the phase-encoded image in the coherent optical correlator is evaluated. The joint transform correlator (JTC) with a liquid crystal spatial light modulator placed in the spectral plane of the JTC was created for experimental proving of obtained results. The sufficient increase of the phase-encoded images correlation peaks in this JTC was observed and explained. Supposition about phase encoding of images in retina of a biological vision system for explanation of high recognition ability of vital organisms is proposed.

Paper Details

Date Published: 10 November 1995
PDF: 11 pages
Proc. SPIE 2647, International Conference on Holography and Correlation Optics, (10 November 1995); doi: 10.1117/12.226700
Show Author Affiliations
Volodymyr M. Fitio, Institute of Physics and Mechanics (Ukraine)
Leonid I. Muravsky, Institute of Physics and Mechanics (Ukraine)
Arkadiy I. Stefansky, Institute of Physics and Mechanics (Ukraine)

Published in SPIE Proceedings Vol. 2647:
International Conference on Holography and Correlation Optics
Oleg V. Angelsky, Editor(s)

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