Parallel classification of multiple objects using a phase-only multichannel optical correlator
We present a technique that allows us to increment the number of objects to be detected and classified simultaneously in an optical patterns recognition process. It basically consists of the multiplexing of several phase-only filters. The elimination of the convolution signal at the final correlatio...
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00913286_v42_n8_p2354_Villareal |
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todo:paper_00913286_v42_n8_p2354_Villareal2023-10-03T14:55:02Z Parallel classification of multiple objects using a phase-only multichannel optical correlator Villareal, M. Iemmi, C. Campos, J. Liquid crystal displays Pattern recognition Phase-only filters Computer simulation Convolution Correlators Fourier transforms Liquid crystal displays Multiplexing Optical correlation Optical filters Optical correlators Optical pattern recognition Phase only filters Vander Lugt correlator Object recognition We present a technique that allows us to increment the number of objects to be detected and classified simultaneously in an optical patterns recognition process. It basically consists of the multiplexing of several phase-only filters. The elimination of the convolution signal at the final correlation plane, by means of the direct implementation of phase-only filters, allows an increase in the number of channels to be used in a Vander Lugt correlator. The difference among these composed filters and others proposed before lies in the way they are synthesized. Usually filters are physically implemented by using amplitude media, and it is necessary to perform an encoding of the phase information. In the proposed method, no encoding technique is used to convert the phase values into amplitude ones. The implementation of this kind of filter is carried out by using liquid crystal displays working in phase-only mode. We present in this work numerical simulations and experimental results obtained from the implementation of two different kinds of phase-only filters. Impulse responses and correlation signals are analyzed. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00913286_v42_n8_p2354_Villareal |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Liquid crystal displays Pattern recognition Phase-only filters Computer simulation Convolution Correlators Fourier transforms Liquid crystal displays Multiplexing Optical correlation Optical filters Optical correlators Optical pattern recognition Phase only filters Vander Lugt correlator Object recognition |
| spellingShingle |
Liquid crystal displays Pattern recognition Phase-only filters Computer simulation Convolution Correlators Fourier transforms Liquid crystal displays Multiplexing Optical correlation Optical filters Optical correlators Optical pattern recognition Phase only filters Vander Lugt correlator Object recognition Villareal, M. Iemmi, C. Campos, J. Parallel classification of multiple objects using a phase-only multichannel optical correlator |
| topic_facet |
Liquid crystal displays Pattern recognition Phase-only filters Computer simulation Convolution Correlators Fourier transforms Liquid crystal displays Multiplexing Optical correlation Optical filters Optical correlators Optical pattern recognition Phase only filters Vander Lugt correlator Object recognition |
| description |
We present a technique that allows us to increment the number of objects to be detected and classified simultaneously in an optical patterns recognition process. It basically consists of the multiplexing of several phase-only filters. The elimination of the convolution signal at the final correlation plane, by means of the direct implementation of phase-only filters, allows an increase in the number of channels to be used in a Vander Lugt correlator. The difference among these composed filters and others proposed before lies in the way they are synthesized. Usually filters are physically implemented by using amplitude media, and it is necessary to perform an encoding of the phase information. In the proposed method, no encoding technique is used to convert the phase values into amplitude ones. The implementation of this kind of filter is carried out by using liquid crystal displays working in phase-only mode. We present in this work numerical simulations and experimental results obtained from the implementation of two different kinds of phase-only filters. Impulse responses and correlation signals are analyzed. |
| format |
JOUR |
| author |
Villareal, M. Iemmi, C. Campos, J. |
| author_facet |
Villareal, M. Iemmi, C. Campos, J. |
| author_sort |
Villareal, M. |
| title |
Parallel classification of multiple objects using a phase-only multichannel optical correlator |
| title_short |
Parallel classification of multiple objects using a phase-only multichannel optical correlator |
| title_full |
Parallel classification of multiple objects using a phase-only multichannel optical correlator |
| title_fullStr |
Parallel classification of multiple objects using a phase-only multichannel optical correlator |
| title_full_unstemmed |
Parallel classification of multiple objects using a phase-only multichannel optical correlator |
| title_sort |
parallel classification of multiple objects using a phase-only multichannel optical correlator |
| url |
http://hdl.handle.net/20.500.12110/paper_00913286_v42_n8_p2354_Villareal |
| work_keys_str_mv |
AT villarealm parallelclassificationofmultipleobjectsusingaphaseonlymultichannelopticalcorrelator AT iemmic parallelclassificationofmultipleobjectsusingaphaseonlymultichannelopticalcorrelator AT camposj parallelclassificationofmultipleobjectsusingaphaseonlymultichannelopticalcorrelator |
| _version_ |
1782023588487888896 |