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Proceedings Paper

Influence Of The Choice Of Expansion Center On The Rotationally Invariant Correlation Filters Performance
Author(s): S Bosch; J Campos; I Juvells; S Vallmitjana
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Paper Abstract

During the past few years new techniques based on circular harmonic expansion have been introduced in the field of pattern recognition and some important advances have been achie-ved recently. Whether using single circular harmonic filters or using multimode filters it is necessary to choose a geometrical center for the harmonic expansion. We show that this choice results in different performances when the designed filter is used, both with respect to the height of the correlation peak and also with respect to the discrimination capability between simi-lar inputs. For the single harmonic filter, we study the influence on the performance of the method of the following factors: the choice of the harmonic order and the choice of expansion cen-ter used. For multimode filters, a possible real time method for rotationally invariant pattern recognition can be developed on the basis of the detection of N correlation plane intensity matrix at the same time the filter spins a whole turn. In this case, the dependence on the choice of expansion center and the minimum number N of correlations for a good detection is shown.

Paper Details

Date Published: 11 April 1988
PDF: 7 pages
Proc. SPIE 0860, Real-Time Image Processing: Concepts and Technologies, (11 April 1988); doi: 10.1117/12.943384
Show Author Affiliations
S Bosch, Universitat de Barcelona (Spain)
J Campos, Universitat de Barcelona (Spain)
I Juvells, Universitat de Barcelona (Spain)
S Vallmitjana, Universitat de Barcelona (Spain)

Published in SPIE Proceedings Vol. 0860:
Real-Time Image Processing: Concepts and Technologies
Jean Besson, Editor(s)

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