Pattern recognition with an adaptive phase-input joint transform correlator

被引：0

作者：

Diaz-Ramirez, Victor H. ^{[1
]}

Kober, Vitaly ^{[1
]}

Alvarez-Borrego, Josue ^{[2
]}

机构：

[1] CICESE, Dept Comp Sci, Km 107 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico

[2] CICESE, Dept Opt, Ensenada 22860, Baja California, Mexico

来源：

OPTICAL INFORMATION SYSTEMS IV | 2006年 / 6311卷

关键词：

joint transform correlator; adaptive correlation filters; synthetic discriminant functions; intensity to phase mapping; spatial light modulators;

D O I：

10.1117/12.678546

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An adaptive phase-input joint transform correlator for real-time pattern recognition is presented. A reference image for the correlator is generated with a new iterative algorithm based on synthetic discriminant functions. The obtained reference image contains the information needed to discriminate reliably a target against known false objects and a cluttered background. Calibration look-up tables of all used opto-electronic elements are included in the design of the adaptive phase-input joint transform correlator. The resulting joint input image for the correlator is a real-valued bipolar image, which cannot be directly displayed with a conventional amplitude-only spatial light modulator. Commonly two optical correlations and post-processing are used. We utilize a phase-only spatial light modulator in the input plane. A new phase-only joint input image is obtained by a monotonic mapping the intensity to phase information. The phase-only image is easily introduced into an optical setup. In this case we need just one correlation and no post-processing. Experimental results are provided and compared with those obtained with computer simulations.

引用

页数：11

共 29 条

[11] ROTATION-INVARIANT DIGITAL PATTERN-RECOGNITION USING CIRCULAR HARMONIC EXPANSION
HSU, YN
ARSENAULT, HH
APRIL, G
[J]. APPLIED OPTICS, 1982, 21 (22): : 4012 - 4015
[12] DESIGN OF FILTERS TO DETECT A NOISY TARGET IN NONOVERLAPPING BACKGROUND-NOISE
JAVIDI, B
WANG, J
[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1994, 11 (10): : 2604 - 2612
[13] OPTIMUM FILTER FOR DETECTION OF A TARGET IN NONOVERLAPPING SCENE NOISE
JAVIDI, B
WANG, J
[J]. APPLIED OPTICS, 1994, 33 (20): : 4454 - 4458
[14] JAVIDI B, 1994, REAL TIME OPTICAL IN
[15] Unique measurement of the parameters of a twisted-nematic liquid-crystal display
Kim, H
Lee, YH
[J]. APPLIED OPTICS, 2005, 44 (09) : 1642 - 1649
[16] OPTIMAL FILTER APPROXIMATION BY MEANS OF A PHASE-ONLY FILTER WITH QUANTIZATION
KOBER, V
YAROSLAVSKY, LP
CAMPOS, J
YZUEL, MJ
[J]. OPTICS LETTERS, 1994, 19 (13) : 978 - 980
[17] Accuracy of location measurement of a noisy target in a nonoverlapping background
Kober, V
Campos, J
[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1996, 13 (08): : 1653 - 1666
[18] TUTORIAL SURVEY OF COMPOSITE FILTER DESIGNS FOR OPTICAL CORRELATORS
KUMAR, BVKV
[J]. APPLIED OPTICS, 1992, 31 (23) : 4773 - 4801
[19] PERFORMANCE-MEASURES FOR CORRELATION FILTERS
KUMAR, BVKV
HASSEBROOK, L
[J]. APPLIED OPTICS, 1990, 29 (20) : 2997 - 3006
[20] Joint transform correlator architecture with a single LCTV operating in phase-mostly mode
Ledesma, S
Iemmi, C
Campos, J
Yzuel, MJ
[J]. OPTICS COMMUNICATIONS, 1998, 151 (1-3) : 101 - 109

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