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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 22, Iss. 1 — Jan. 1, 1983
  • pp: 130–132

Rotation-invariant discrimination between almost similar objects

H. H. Arsenault and Yuan-Neng Hsu  »View Author Affiliations


Applied Optics, Vol. 22, Issue 1, pp. 130-132 (1983)
http://dx.doi.org/10.1364/AO.22.000130


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Abstract

A modified circular harmonic filter may be used for the rotation-invariant discrimination of a target from another object which contains the same pattern as the target. The method is illustrated by the experimental rotation-invariant detection of the letter F in the presence of the letter E.

© 1983 Optical Society of America

History
Original Manuscript: July 7, 1982
Published: January 1, 1983

Citation
H. H. Arsenault and Yuan-Neng Hsu, "Rotation-invariant discrimination between almost similar objects," Appl. Opt. 22, 130-132 (1983)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-22-1-130


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References

  1. E. G. Paek, S. S. Lee, Can. J. Phys. 57, 1335 (1979). [CrossRef]
  2. Y.-N. Hsu, H. H. Arsenault, G. April, “Rotation Invariant Digital Pattern Recognition Using the Circular Harmonic Expansion,” Appl. Opt. (in press).
  3. Y.-N. Hsu, H. H. Arsenault, “Optical Pattern Recognition Using the Circular Harmonic Expansion,” Appl. Opt. (in press).

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