| Wavelength-compensated time-sequential multiplexed color joint transform correlator. | |
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MedLine Citation:
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PMID: 20830174 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We report a wavelength-compensated three-channel (RGB) joint transform correlator (JTC) for color pattern recognition using a ferroelectric liquid-crystal spatial light modulator (SLM) operating in binary pure phase modulation. We apply a previously reported time-multiplexing technique useful in creating wavelength-compensated diffraction patterns, based on the synchronization of properly scaled diffraction masks with the input wavelength selection obtained by applying a rotating RGB color-filter wheel to an Ar-Kr laser. The application of this technique to a JTC architecture permits real-time color object detection. In order to achieve a high light efficiency for the correlation process, we combine the design of zero-order joint power spectra in all color channels with the selection of a certain polarization configuration of the SLM, producing a broadband phase-only modulation. Excellent experimental results demonstrating color-object detection are provided. |
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Authors:
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P García-Martínez; J L Martínez; M M Sánchez-López; I Moreno |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Applied optics Volume: 49 ISSN: 1539-4522 ISO Abbreviation: Appl Opt Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-10 Completed Date: 2010-12-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0247660 Medline TA: Appl Opt Country: United States |
Other Details:
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Languages: eng Pagination: 4866-73 Citation Subset: IM |
Affiliation:
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Departamento de Optica, Universitat de València, C/Doctor Moliner 50, 46100 Burjassot, Spain. pascuala.garcia@uv.es |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Color* Computer Simulation Image Processing, Computer-Assisted / instrumentation* Lasers Liquid Crystals / chemistry Pattern Recognition, Automated* Spectrum Analysis / instrumentation* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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