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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 26 — Sep. 10, 2003
  • pp: 5290–5301

Hybrid nonlinear joint transform correlator that operates at a high frame rate

Taketsugu Yao and Takumi Minemoto  »View Author Affiliations


Applied Optics, Vol. 42, Issue 26, pp. 5290-5301 (2003)
http://dx.doi.org/10.1364/AO.42.005290


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Abstract

A joint transform correlator has been constructed by a spatial light modulator that uses the electroabsorption effect of GaAs crystal and operates at a high frame rate a TV camera with logarithmic response and a personal computer. In the system, logarithmic values of joint power spectra generated in an optical system were electrically digitized and inverse-Fourier transformed. The system has accomplished the operation of correlation with a throughput time smaller than 10 ms per an input image.

© 2003 Optical Society of America

OCIS Codes
(100.1160) Image processing : Analog optical image processing
(100.2000) Image processing : Digital image processing
(100.4550) Image processing : Correlators
(100.5010) Image processing : Pattern recognition
(230.6120) Optical devices : Spatial light modulators

History
Original Manuscript: December 25, 2002
Revised Manuscript: May 26, 2003
Published: September 10, 2003

Citation
Taketsugu Yao and Takumi Minemoto, "Hybrid nonlinear joint transform correlator that operates at a high frame rate," Appl. Opt. 42, 5290-5301 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-26-5290


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References

  1. Y. Osugi, H. Mizukawa, T. Minemoto, “Quantization and truncation conditions of Fourier power spectrum for good performance in binary subtracted joint transform correlator,” Opt. Rev. 3, 161–170 (1996). [CrossRef]
  2. Y. Bitou, H. Ohta, T. Minemoto, “High-speed and high-contrast spatial light modulator that uses electroabsorption in a GaAs single crystal,” Appl. Opt. 37, 1377–1385 (1998). [CrossRef]
  3. Y. Bitou, T. Minemoto, “High-contrast spatial light modulator by use of the electroabsorption and electro-optic effects in a GaAs single crystal,” Appl. Opt. 37, 4347–4356 (1998). [CrossRef]
  4. Y. Bitou, Y. Osugi, T. Minemoto, “High-speed and high-contrast incoherent-to-coherent converter that uses a GaAs single crystal,” Opt. Eng. 38, 710–716 (1999). [CrossRef]
  5. Y. Iwamoto, T. Minemoto, “Comparisons of performance under brightness changes of target scenes between nonlinear joint transform correlators that use input images with pure-amplitude, pure-phase, and complex data,” Opt. Eng. 41, 41–49 (2002). [CrossRef]
  6. The TV camera system was made by Institute for Microelectronics Stuttgart, Germany.
  7. L. P. Yaroslavsky, “Nonlinear optical correlators with improved discrimination capability for object location and recognition,” in Optical Pattern Recognition, F. T. S. Yu, ed. (Cambridge University, Cambridge, U.K., 1998), Ch. 6, pp. 159–164.
  8. T. Yao, T. Minemoto, “Pattern recognition by quantization of modulated function to complexes of a quadrupole in matched filtering,” Opt. Eng. (to be published).

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