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Proceedings Paper

Pattern recognition with incoherent light and rotation invariance
Author(s): Eran Elizur; Asher A. Friesem
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Paper Abstract

An algorithm based on circular harmonic expansion has been incorporated into a pattern recognition system using spatially incoherent light. In this algorithm the model used for recording the necessary recognition filter is derived from the absolute value of one of the circular harmonic components of the desired pattern so that both rotation and shift invariances are obtained. Computer simulations reveal that the algorithm can indeed provide adequate peak to background ratios regardless of the input rotation and lateral shift. The details of the algorithm along with results of computer simulations are presented.

Paper Details

Date Published: 1 April 1991
PDF: 5 pages
Proc. SPIE 1442, 7th Mtg in Israel on Optical Engineering, (1 April 1991); doi: 10.1117/12.49040
Show Author Affiliations
Eran Elizur, Weizmann Institute of Science (Israel)
Asher A. Friesem, Weizmann Institute of Science (Israel)

Published in SPIE Proceedings Vol. 1442:
7th Mtg in Israel on Optical Engineering

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