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Applied Optics

Applied Optics


  • Vol. 27, Iss. 14 — Jul. 15, 1988
  • pp: 2895–2899

Circular harmonic phase filters for efficient rotation-invariant pattern recognition

Joseph Rosen and Joseph Shamir  »View Author Affiliations

Applied Optics, Vol. 27, Issue 14, pp. 2895-2899 (1988)

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A generalized approach for pattern recognition using spatial filters with reduced tolerance requirements was described in some recent publications. This approach leads to various possible implementations such as the composite matched filter, the circular harmonic matched filter, or the composite circular harmonic matched filter. The present work describes new examples leading to very high selectivity filters retaining rotation invariance and reduced requirements on device resolution. Computer simulations and laboratory experiments show the advantages of this approach.

© 1988 Optical Society of America

Original Manuscript: August 4, 1987
Published: July 15, 1988

Joseph Rosen and Joseph Shamir, "Circular harmonic phase filters for efficient rotation-invariant pattern recognition," Appl. Opt. 27, 2895-2899 (1988)

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