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Applied Optics

Applied Optics


  • Vol. 31, Iss. 29 — Oct. 10, 1992
  • pp: 6187–6189

Circular harmonic filters for a rotation-invariant incoherent correlator

Adolf W. Lohmann and David Mendlovic  »View Author Affiliations

Applied Optics, Vol. 31, Issue 29, pp. 6187-6189 (1992)

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The incoherent optical correlator was extended to perform rotation-invariant pattern recognition by using a set of two real-positive filters presenting a single-order circular harmonic function.

© 1992 Optical Society of America

Original Manuscript: February 18, 1992
Published: October 10, 1992

Adolf W. Lohmann and David Mendlovic, "Circular harmonic filters for a rotation-invariant incoherent correlator," Appl. Opt. 31, 6187-6189 (1992)

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  1. A. W. Lohmann, H. W. Werlich, “Incoherent matched filter with Fourier holograms,” Appl. Opt. 7, 561–563 (1968).
  2. H. Bartelt, S. K. Case, R. Hauck, “Incoherent optical processing,” in Applications of Optical Fourier Transforms, H. Stark, ed. (Academic, Orlando, Fla., 1982).
  3. Y.-N. Hsu, H. H. Arsenault, “Optical pattern recognition using circular harmonic expansion,” Appl. Opt. 21, 4016–4019 (1982). [CrossRef] [PubMed]
  4. E. Elizur, A. A. Friesem, “Roatation-invariant correlator with incoherent light,” Appl. Opt. 30, 4175–4178 (1991). [CrossRef] [PubMed]
  5. D. Mendlovic, E. Marom, N. Konforti, “Shift and scale invariant pattern recognition using Mellin radial harmonics,” Opt. Commun. 67, 172–176 (1988). [CrossRef]

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