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Applied Optics

Applied Optics


  • Vol. 24, Iss. 14 — Jul. 15, 1985
  • pp: 2072–2075

Contrast-invariant pattern recognition using circular harmonic components

Henri H. Arsenault and Claude Delisle  »View Author Affiliations

Applied Optics, Vol. 24, Issue 14, pp. 2072-2075 (1985)

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A method has been devised to accomplish contrast-invariant pattern recognition using multiple circular harmonic components. In addition to detecting targets with various contrasts in the presence of high-contrast objects, the method is shift- and rotation-invariant. A vector f is formed from the autocorrelation values for each member of a set of circular harmonic components corresponding to the target of interest. The unit vector f/f is a feature vector whose direction characterizes the target. Target detection is accomplished by comparing the corresponding cross-correlation unit vector to the vector f/f. Experimental results are shown.

© 1985 Optical Society of America

Original Manuscript: December 27, 1984
Published: July 15, 1985

Henri H. Arsenault and Claude Delisle, "Contrast-invariant pattern recognition using circular harmonic components," Appl. Opt. 24, 2072-2075 (1985)

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