Triple joint transform correlator

Hui Zhang; Colin M. Cartwright; Meisong Ding; G. A. Gillespie

doi:10.1117/12.341300

Triple joint transform correlator

Hui Zhang, Colin M. Cartwright, Meisong Ding, G. A. Gillespie

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The joint transform correlator (JTC) is a robust architecture for optical object recognition or verification and has been investigated intensively for a number of years. In order to improve its performance digital processing, such as binarization to an appropriate threshold, has been proposed at the recording stage of the joint power spectrum (JPS), this of course to some extent negates the benefits of an optical system. We propose to employ a third beam which is coherent to the beams forming the JPS and is the Fourier transform of an appropriate third input image and thus can be used to modify the JPS so as to implement a phase only filtering action for example. The triple joint transform correlator thus consists of three Fourier spectra incident simultaneously on a photorefractive crystal and can exhibit improved discrimination over the conventional JTC without an intermediate digital processing stage. Computer simulations and experimental results are presented.

Original language	English
Title of host publication	SPIE proceedings
Subtitle of host publication	Optical pattern recognition X
Editors	David P. Casasent, Tien-Hsin Chao
Place of Publication	Orlando, FL
Pages	185-196
Number of pages	12
Volume	3715
DOIs	https://doi.org/10.1117/12.341300
Publication status	Published - 9 Mar 1999
Event	SPIE's 13th Annual International Symposium on Aerospace/Defense Sensing,Simulation and Controls - Orlando, United States Duration: 5 Apr 1999 → 9 Apr 1999 Conference number: 13

Publication series

Name	SPIE Proceedings
Volume	3715

Conference

Conference	SPIE's 13th Annual International Symposium on Aerospace/Defense Sensing,Simulation and Controls
Country/Territory	United States
City	Orlando
Period	5/04/99 → 9/04/99

Keywords

Joint transform correlator
Optical object recognition
Digital signal processing
Fourier transforms
Computer simulations
Crystals
Optical systems

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10.1117/12.341300

Cite this

@inproceedings{88efea74dff24c27970e89e54911201f,

title = "Triple joint transform correlator",

abstract = "The joint transform correlator (JTC) is a robust architecture for optical object recognition or verification and has been investigated intensively for a number of years. In order to improve its performance digital processing, such as binarization to an appropriate threshold, has been proposed at the recording stage of the joint power spectrum (JPS), this of course to some extent negates the benefits of an optical system. We propose to employ a third beam which is coherent to the beams forming the JPS and is the Fourier transform of an appropriate third input image and thus can be used to modify the JPS so as to implement a phase only filtering action for example. The triple joint transform correlator thus consists of three Fourier spectra incident simultaneously on a photorefractive crystal and can exhibit improved discrimination over the conventional JTC without an intermediate digital processing stage. Computer simulations and experimental results are presented.",

author = "Hui Zhang and Cartwright, {Colin M.} and Meisong Ding and Gillespie, {G. A.}",

year = "1999",

month = mar,

day = "9",

doi = "10.1117/12.341300",

language = "English",

volume = "3715",

series = "SPIE Proceedings",

pages = "185--196",

editor = "Casasent, {David P.} and Tien-Hsin Chao",

booktitle = "SPIE proceedings",

note = "SPIE's 13th Annual International Symposium on Aerospace/Defense Sensing,Simulation and Controls ; Conference date: 05-04-1999 Through 09-04-1999",

}

Zhang, H, Cartwright, CM, Ding, M & Gillespie, GA 1999, Triple joint transform correlator. in DP Casasent & T-H Chao (eds), SPIE proceedings: Optical pattern recognition X. vol. 3715, SPIE Proceedings, vol. 3715, Orlando, FL, pp. 185-196, SPIE's 13th Annual International Symposium on Aerospace/Defense Sensing,Simulation and Controls, Orlando, Florida, United States, 5/04/99. https://doi.org/10.1117/12.341300

TY - GEN

T1 - Triple joint transform correlator

AU - Zhang, Hui

AU - Cartwright, Colin M.

AU - Ding, Meisong

AU - Gillespie, G. A.

N1 - Conference code: 13

PY - 1999/3/9

Y1 - 1999/3/9

N2 - The joint transform correlator (JTC) is a robust architecture for optical object recognition or verification and has been investigated intensively for a number of years. In order to improve its performance digital processing, such as binarization to an appropriate threshold, has been proposed at the recording stage of the joint power spectrum (JPS), this of course to some extent negates the benefits of an optical system. We propose to employ a third beam which is coherent to the beams forming the JPS and is the Fourier transform of an appropriate third input image and thus can be used to modify the JPS so as to implement a phase only filtering action for example. The triple joint transform correlator thus consists of three Fourier spectra incident simultaneously on a photorefractive crystal and can exhibit improved discrimination over the conventional JTC without an intermediate digital processing stage. Computer simulations and experimental results are presented.

AB - The joint transform correlator (JTC) is a robust architecture for optical object recognition or verification and has been investigated intensively for a number of years. In order to improve its performance digital processing, such as binarization to an appropriate threshold, has been proposed at the recording stage of the joint power spectrum (JPS), this of course to some extent negates the benefits of an optical system. We propose to employ a third beam which is coherent to the beams forming the JPS and is the Fourier transform of an appropriate third input image and thus can be used to modify the JPS so as to implement a phase only filtering action for example. The triple joint transform correlator thus consists of three Fourier spectra incident simultaneously on a photorefractive crystal and can exhibit improved discrimination over the conventional JTC without an intermediate digital processing stage. Computer simulations and experimental results are presented.

U2 - 10.1117/12.341300

DO - 10.1117/12.341300

M3 - Conference contribution

VL - 3715

T3 - SPIE Proceedings

SP - 185

EP - 196

BT - SPIE proceedings

A2 - Casasent, David P.

A2 - Chao, Tien-Hsin

CY - Orlando, FL

T2 - SPIE's 13th Annual International Symposium on Aerospace/Defense Sensing,Simulation and Controls

Y2 - 5 April 1999 through 9 April 1999

ER -

Triple joint transform correlator

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