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Proceedings Paper

Two-dimensional two-step Fourier spectrum analysis for similar-image identification
Author(s): Vladimir B. Markov; Yobani Mejia
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Paper Abstract

In this report the method of the analysis of two similar structures is discussed. The structures to be compared are considered as two dimensional, amplitude only and are composed by identical apertures. The difference between theses structures is connected with spatial position of the one or several apertures. This difference can be found by: (1) comparison of the two secondary Fourier spectra (auto- correlation signals) of corresponding transmittance functions, and (2) comparison of the cross-correlation signal and the first auto-correlation signal. In that case, we can describe directly the second structure. So, the knowledge of the structures is possible even though we do not know apriory the structures. Some experimental and computer simulated results applied to pattern recognition are presented.

Paper Details

Date Published: 1 April 1998
PDF: 9 pages
Proc. SPIE 3314, Optical Security and Counterfeit Deterrence Techniques II, (1 April 1998); doi: 10.1117/12.304681
Show Author Affiliations
Vladimir B. Markov, Institute of Applied Optics (Ukraine) and Ctr. Internacional de Fisica (United States)
Yobani Mejia, Institute of Applied Optics (Ukraine) and Ctr. Internacional de Fisica (Columbia) (Colombia)


Published in SPIE Proceedings Vol. 3314:
Optical Security and Counterfeit Deterrence Techniques II
Rudolf L. van Renesse, Editor(s)

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