Shift and projection invariant pattern recognition using logarithmic harmonics

Research output: Contribution to journalArticlepeer-review

Abstract

Optical correlation schemes based on a matched filter containing a single logarithmic harmonic of an object are described. This correlator can provide shift and projection (tilt) invariant pattern recognition. The logarithmic harmonics, their orthogonality, and their completeness are presented, as well as experimental results using computer simulations and real optical targets. The projection invariance and the discrimination ability of this filter are successfully demonstrated.

Original languageEnglish
Pages (from-to)4784-4789
Number of pages6
JournalApplied Optics
Volume29
Issue number32
DOIs
StatePublished - 10 Nov 1990

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