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Abstract:

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.

Registro:

Documento: Artículo
Título:Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
Autor:Ledesma, S.; Iemmi, C.; Campos, J.; Yzuel, M.J.
Filiación:Departamento de Física, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Grupo de Óptica, Univ. Autónoma de Barcelona, E-08193 Bellaterra, Spain
Palabras clave: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
Año:1998
Volumen:151
Número:1-3
Página de inicio:101
Página de fin:109
DOI: http://dx.doi.org/10.1016/S0030-4018(98)00027-3
Título revista:Optics Communications
Título revista abreviado:Opt Commun
ISSN:00304018
CODEN:OPCOB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00304018_v151_n1-3_p101_Ledesma

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Citas:

---------- APA ----------
Ledesma, S., Iemmi, C., Campos, J. & Yzuel, M.J. (1998) . Joint transform correlator architecture with a single LCTV operating in phase-mostly mode. Optics Communications, 151(1-3), 101-109.
http://dx.doi.org/10.1016/S0030-4018(98)00027-3
---------- CHICAGO ----------
Ledesma, S., Iemmi, C., Campos, J., Yzuel, M.J. "Joint transform correlator architecture with a single LCTV operating in phase-mostly mode" . Optics Communications 151, no. 1-3 (1998) : 101-109.
http://dx.doi.org/10.1016/S0030-4018(98)00027-3
---------- MLA ----------
Ledesma, S., Iemmi, C., Campos, J., Yzuel, M.J. "Joint transform correlator architecture with a single LCTV operating in phase-mostly mode" . Optics Communications, vol. 151, no. 1-3, 1998, pp. 101-109.
http://dx.doi.org/10.1016/S0030-4018(98)00027-3
---------- VANCOUVER ----------
Ledesma, S., Iemmi, C., Campos, J., Yzuel, M.J. Joint transform correlator architecture with a single LCTV operating in phase-mostly mode. Opt Commun. 1998;151(1-3):101-109.
http://dx.doi.org/10.1016/S0030-4018(98)00027-3