Circular harmonic phase filters for efficient rotationinvariant pattern recognition

Joseph Rosen, Joseph Shamir

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


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.

Original languageEnglish
Pages (from-to)2895-2899
Number of pages5
JournalApplied Optics
Issue number14
StatePublished - 1 Jan 1988
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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