Constrained optimization on the nonzero-order joint transform correlator constructed with the Mach–Zehnder configuration

Chen, Chihung; Chen, Chulung; Lee, Chung-Cheng; Chen, Chi‐Wen

doi:10.1016/j.optcom.2003.12.041

Cited by 10 publications

(2 citation statements)

References 13 publications

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“…The minimum average correlation energy (MACE) [10] approach is also utilized to design the reference functions in the input spatial domain of the MZJTC proposed by Chen et al [11]. The technique can yield sharp correlation peaks.…”

Section: Introductionmentioning

confidence: 99%

A Mach-Zehnder nonzero order joint transform correlator based on the YIQ color space for polychromatic pattern recognition

Lee

Chen

et al. 2007

SPIE Proceedings

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A novel nonzero-order joint transform correlator system with the Mach-Zehnder configuration for polychromatic pattern recognition is presented. To remove zero order term is a very important thing for optical pattern recognition. We cleverly utilize the Stokes relations to remove the large zero order term directly in only one step in this structure. In the proposed technique, we investigate color pattern recognition with YIQ channels involving in-plane distortion such as rotations. Furthermore, the utilization of minimum average correlation energy to generate the composite reference image for enhancing the correlation output is also studied. The computer simulation results are presented to show the validity of the proposed technique.

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Section: Introductionmentioning

confidence: 99%

A Mach-Zehnder nonzero order joint transform correlator based on the YIQ color space for polychromatic pattern recognition

Lee

Chen

et al. 2007

SPIE Proceedings

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“…The desired cross-correlation peaks were almost overshadowed and the output detector was often saturated by the zero order. Accordingly, several research groups have investigated to improve the performance of JTC [3][4][5]. To reduce or to eliminate the zero order diffraction and to enhance the recognition ability, Lu et al [6] applied a phaseshifting technique to the CJTC and Li et al [7] proposed the JTPS subtraction strategy to accomplish the nonzero order JTC (NOJTC).…”

Section: Introductionmentioning

confidence: 99%

Color pattern recognition using image encoding joint transform correlator

Lee

Chen

2007

Micro & Optical Tech Letters

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A color pattern recognition scheme with encoding technique based on the nonzero order joint transform correlator is proposed. Each color target image is organized as a new grayscale encoded image. A Lagrange multipliers approach is also used to design an optimized synthetic reference function. A joint transform power spectrum subtraction method is applied to remove the zero order terms in addition. Simulation results verify the performance of the proposed technique. This correlator can reduce the channel number in the input and still maintain good ability in color image recognition. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1665–1669, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22554

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Distortion Tolerant Color Pattern Recognition by Using Mach-Zehnder Joint Transform Correlator with Image Encoding Technique

Lee¹,

Chen²

2008

Lecture Notes in Electrical Engineering

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Constrained optimization on the nonzero-order joint transform correlator constructed with the Mach–Zehnder configuration

Cited by 10 publications

References 13 publications

A Mach-Zehnder nonzero order joint transform correlator based on the YIQ color space for polychromatic pattern recognition

A Mach-Zehnder nonzero order joint transform correlator based on the YIQ color space for polychromatic pattern recognition

Color pattern recognition using image encoding joint transform correlator

Distortion Tolerant Color Pattern Recognition by Using Mach-Zehnder Joint Transform Correlator with Image Encoding Technique

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