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Applied Optics

Applied Optics


  • Vol. 42, Iss. 8 — Mar. 10, 2003
  • pp: 1434–1440

Rotation invariant color pattern recognition by use of a three-dimensional Fourier transform

Oscar Gualdrón, Josep Nicolás, Juan Campos, and Maria J. Yzuel  »View Author Affiliations

Applied Optics, Vol. 42, Issue 8, pp. 1434-1440 (2003)

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Recently, the use of three-dimensional correlation for multichannel pattern recognition has been introduced. In this work we propose the use of circular harmonic components with this new technique to obtain invariance under target rotations. The differences between this method and the previous use of circular harmonic filters for multichannel images are discussed. Also the problem of determining the proper center is studied and, to our knowledge, a new and more understandable criterion to locate it is introduced. Some simulation results to verify the successful operation of the method are included.

© 2003 Optical Society of America

OCIS Codes
(070.5010) Fourier optics and signal processing : Pattern recognition
(100.4550) Image processing : Correlators
(100.5760) Image processing : Rotation-invariant pattern recognition
(100.6890) Image processing : Three-dimensional image processing

Original Manuscript: June 5, 2002
Revised Manuscript: October 22, 2002
Published: March 10, 2003

Oscar Gualdrón, Josep Nicolás, Juan Campos, and Maria J. Yzuel, "Rotation invariant color pattern recognition by use of a three-dimensional Fourier transform," Appl. Opt. 42, 1434-1440 (2003)

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