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dc.contributor.authorJoseph, Joby
dc.contributor.authorSingh, K
dc.contributor.authorPillai, P K C
dc.date.accessioned2007-02-13T03:29:55Z
dc.date.accessioned2019-02-09T08:23:07Z
dc.date.available2007-02-13T03:29:55Z
dc.date.available2019-02-09T08:23:07Z
dc.date.issued1991
dc.identifier.citationOptics Communications,85(5-6), 389-392p.en
dc.identifier.urihttp://localhost:8080/xmlui/handle/12345678/2498
dc.description.abstractA real-time image processing technique has been described, using a two-beam coupling geometry in photorefractive materials. An erase beam copropagating with the signal beam allows spatial amplification of selected frequency components at the Fourier plane. A single lens Fourier transformation and imaging has been employed here, making the scheme simple and compact. The technique is capable of performing operations such as edge enhancement, band pass filtering and pattern recognition, etc. It has inherent capabilities of real-time operation, cascadability and energy efficiency as compared to the conventional spatial filtering operations. Edge enhancement and band pass filtering operations have been demonstrated using a photorefractive BaTiO3 crystal for two-beam coupling.en
dc.format.extent128020 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.subjectPphotorefractive materialsen
dc.subjectTwo-beam couplingen
dc.subjectSpatial amplificationen
dc.subjectEnergy efficiencyen
dc.titleSpatial amplification via photorefractive two-beam coupling; real-time image processing using controllable erasure of Fourier spectrumen
dc.typeArticleen


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