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Proceedings Paper

Two design techiques for 2-D FIR LoG filters
Author(s): Pierre Siohan; Danielle Pele; Valery Ouvrard
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Paper Abstract

One of the most popular technique for edge detection is based on the convolution of the image with a LoG operator namely the Laplacian of Gaussian characterized by a space constant a. We propose an approximation of this operator in the frequency domain by means of a finite impulse response filter with powers-of-two coefficients. According to the space constant value two types of realization are considered the direct form or a Chebyshev structure derived on the McClellan transformation. Both techniques lead to efficient implementation of the filters which do not require actual multipliers. Results on a test image are presented for those multiplierless filters together with those obtained by a direct computation of the LoG operator with infinite precision coefficients and it is concluded there are no significant differences.

Paper Details

Date Published: 1 September 1990
PDF: 12 pages
Proc. SPIE 1360, Visual Communications and Image Processing '90: Fifth in a Series, (1 September 1990); doi: 10.1117/12.24111
Show Author Affiliations
Pierre Siohan, CCETT (France)
Danielle Pele, CCETT (France)
Valery Ouvrard, CCETT (France)


Published in SPIE Proceedings Vol. 1360:
Visual Communications and Image Processing '90: Fifth in a Series
Murat Kunt, Editor(s)

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