Joint transform correlator architecture with a single LCTV operating in phase-mostly mode

We propose three different methods for pattern recognition that use a joint transform correlator architecture. They are based on the use of a liquid crystal television operating in a phase-mostly mode along all the process. This feature makes these methods suitable to work with low levels of illumin...

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Autores principales: Ledesma, S., Iemmi, C., Campos, J., Yzuel, M.J.
Formato: JOUR
Materias:
Joint transform correlator
Liquid crystal TV
Pattern recognition
Computer simulation
Encoding (symbols)
Optical design
Spectrum analysis
Television
Joint transform correlators (JTC)
Liquid crystal television (LCTV)
Phase extraction method
Optical correlation
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00304018_v151_n1-3_p101_Ledesma
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00304018_v151_n1-3_p101_Ledesma
record_format dspace
spelling todo:paper_00304018_v151_n1-3_p101_Ledesma2023-10-03T14:40:04Z Joint transform correlator architecture with a single LCTV operating in phase-mostly mode Ledesma, S. Iemmi, C. Campos, J. Yzuel, M.J. Joint transform correlator Liquid crystal TV Pattern recognition Computer simulation Encoding (symbols) Optical design Pattern recognition Spectrum analysis Television Joint transform correlators (JTC) Liquid crystal television (LCTV) Phase extraction method Optical correlation We propose three different methods for pattern recognition that use a joint transform correlator architecture. They are based on the use of a liquid crystal television operating in a phase-mostly mode along all the process. This feature makes these methods suitable to work with low levels of illumination. In the first step of the joint transform correlation the scene and the reference are phase encoded. In the second step we obtain the correlation function by three different ways. The first one is based on the phase encoding of the joint transform spectrum. In the second one the interference term of the joint spectrum is binarized, and in the third one we extract the phase distribution of the joint transform spectrum. The last method allows us to obtain the pure phase correlation. These methods are experimentally implemented and the results are compared with those obtained with the amplitude binarization method. Effects of quantization and saturation are numerically simulated for the phase extraction method. © 1998 Elsevier Science B.V. All rights reserved. Fil:Ledesma, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Iemmi, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00304018_v151_n1-3_p101_Ledesma
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Joint transform correlator
Liquid crystal TV
Pattern recognition
Computer simulation
Encoding (symbols)
Optical design
Pattern recognition
Spectrum analysis
Television
Joint transform correlators (JTC)
Liquid crystal television (LCTV)
Phase extraction method
Optical correlation
spellingShingle Joint transform correlator
Liquid crystal TV
Pattern recognition
Computer simulation
Encoding (symbols)
Optical design
Pattern recognition
Spectrum analysis
Television
Joint transform correlators (JTC)
Liquid crystal television (LCTV)
Phase extraction method
Optical correlation
Ledesma, S.
Iemmi, C.
Campos, J.
Yzuel, M.J.
Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
topic_facet Joint transform correlator
Liquid crystal TV
Pattern recognition
Computer simulation
Encoding (symbols)
Optical design
Pattern recognition
Spectrum analysis
Television
Joint transform correlators (JTC)
Liquid crystal television (LCTV)
Phase extraction method
Optical correlation
description We propose three different methods for pattern recognition that use a joint transform correlator architecture. They are based on the use of a liquid crystal television operating in a phase-mostly mode along all the process. This feature makes these methods suitable to work with low levels of illumination. In the first step of the joint transform correlation the scene and the reference are phase encoded. In the second step we obtain the correlation function by three different ways. The first one is based on the phase encoding of the joint transform spectrum. In the second one the interference term of the joint spectrum is binarized, and in the third one we extract the phase distribution of the joint transform spectrum. The last method allows us to obtain the pure phase correlation. These methods are experimentally implemented and the results are compared with those obtained with the amplitude binarization method. Effects of quantization and saturation are numerically simulated for the phase extraction method. © 1998 Elsevier Science B.V. All rights reserved.
format JOUR
author Ledesma, S.
Iemmi, C.
Campos, J.
Yzuel, M.J.
author_facet Ledesma, S.
Iemmi, C.
Campos, J.
Yzuel, M.J.
author_sort Ledesma, S.
title Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
title_short Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
title_full Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
title_fullStr Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
title_full_unstemmed Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
title_sort joint transform correlator architecture with a single lctv operating in phase-mostly mode
url http://hdl.handle.net/20.500.12110/paper_00304018_v151_n1-3_p101_Ledesma
work_keys_str_mv AT ledesmas jointtransformcorrelatorarchitecturewithasinglelctvoperatinginphasemostlymode
AT iemmic jointtransformcorrelatorarchitecturewithasinglelctvoperatinginphasemostlymode
AT camposj jointtransformcorrelatorarchitecturewithasinglelctvoperatinginphasemostlymode
AT yzuelmj jointtransformcorrelatorarchitecturewithasinglelctvoperatinginphasemostlymode
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