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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 28 — Oct. 1, 1990
  • pp: 4087–4091

Multimatched filtering using a microlens array for an optical–neural pattern recognition system

Masahiro Agu, Atsushi Akiba, Teruhisa Mochizuki, and Shun-ichi Kamemaru  »View Author Affiliations


Applied Optics, Vol. 29, Issue 28, pp. 4087-4091 (1990)
http://dx.doi.org/10.1364/AO.29.004087


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Abstract

In the optical–neural recognition system proposed for flexible parallel information processing, a planar microlens array is used to form simultaneously many identical Fourier transforms of an input pattern; from each transform the feature extraction of the input pattern is performed in parallel through optical correlations with memorized standard spatial filters. In this paper, it is experimentally shown that the multimatched filtering system, as the optical feature extracting part of the proposed system, can be composed of a planar array of graded index microlenses of 1.05-mm diameter and 2.6-mm focal length.

© 1990 Optical Society of America

History
Original Manuscript: November 15, 1989
Published: October 1, 1990

Citation
Masahiro Agu, Atsushi Akiba, Teruhisa Mochizuki, and Shun-ichi Kamemaru, "Multimatched filtering using a microlens array for an optical–neural pattern recognition system," Appl. Opt. 29, 4087-4091 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-28-4087


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References

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  13. J. R. Leger, S. H. Lee, “Hybrid Optical Processor for Pattern Recognition and Classification Using a Generalized Set of Pattern Functions,” Appl. Opt. 21, 274–287 (1982). [CrossRef] [PubMed]
  14. P. Asthana, A. Akiba, T. Yamaki, K. Nishizawa, M. Oikawa, “Graded-Index Lens Matched Filtering,” Opt. Lett. 13, 84–86 (1988). [CrossRef] [PubMed]
  15. M. Agu, A. Akiba, S. Kamemaru, “A Parallel-Processing Optical-Digital Recognition System as a Model of Biological Visual Perception,” Opt. Commun. 66, 69 (1988). [CrossRef]
  16. A. Akiba, M. Agu, S. Kamemaru, T. Yamaki, “A Miniaturization of an Optical Matched Filter,” Kogaku 17, 306–000 (1988).
  17. M. Agu, A. Akiba, S. Kamemaru, “Multimatched Filtering System as a Model of Biological Visual System,” Proc. Soc. Photo-Opt. Instrum. Eng. 1014, 144 (1988).
  18. K. Hamanaka, H. Nemoto, M. Oikawa, E. Okuda,“Multiple Imaging and Mutiple Fourier Transformation Using the PlanarMicrolens Array,” in Technical Digest, MicroopticsConference/Topical Meeting on Graded-Index Optical Imaging System,Tokyo (1989), paper L2.

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