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Titolo:
OPTICAL IMPLEMENTATION OF A WAVELET TRANSFORM BY THE USE OF DYNAMIC HOLOGRAPHIC RECORDING IN A PHOTOREFRACTIVE MATERIAL
Autore:
JOSEPH J; OURA T; MINEMOTO T;
Indirizzi:
KOBE UNIV,FAC ENGN,DEPT INSTRUMENTAT ENGN,NADA KU KOBE 657 JAPAN
Titolo Testata:
Applied optics
fascicolo: 20, volume: 34, anno: 1995,
pagine: 3997 - 4003
SICI:
0003-6935(1995)34:20<3997:OIOAWT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
BI12SIO20 CRYSTALS; MATCHED-FILTERS; SIGNAL; REALIZATION; IMAGE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
J. Joseph et al., "OPTICAL IMPLEMENTATION OF A WAVELET TRANSFORM BY THE USE OF DYNAMIC HOLOGRAPHIC RECORDING IN A PHOTOREFRACTIVE MATERIAL", Applied optics, 34(20), 1995, pp. 3997-4003

Abstract

An optical system that employs holographic recording in a photorefractive material is proposed and experimentally demonstrated for the implementation of a wavelet transform of two-dimensional images. A scalingoperation, to derive the family of wavelet filters from a mother wavelet filter, is performed by the use of an optical feedback loop. The selection of a desired wavelet filter from the family and the correlation for a wavelet transformation are made by the use of a holographic recording in a photorefractive material. The principle of operation of the system relies on the frequency detuning introduced inside the loopand the subsequent variation in the holographic grating diffraction. Experimental results on wavelet-filter selection and wavelet transformation are presented. This nonlinear optical wavelet-transform system is advantageous for pattern recognition applications.

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Documento generato il 28/11/20 alle ore 20:41:25