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Proceedings Paper

Decision-directed entropy-based adaptive filtering
Author(s): Harley R. Myler; Arthur Robert Weeks; Michelle Van Dyke-Lewis
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Paper Abstract

A recurring problem in adaptive filtering is selection of control measures for parameter modification. A number of methods reported thus far have used localized order statistics to adaptively adjust filter parameters. The most effective techniques are based on edge detection as a decision mechanism to allow the preservation of edge information while noise is filtered. In general, decision-directed adaptive filters operate on a localized area within an image by using statistics of the area as a discrimination parameter. Typically, adaptive filters are based on pixel to pixel variations within a localized area that are due to either edges or additive noise. In homogeneous areas within the image where variances are due to additive noise, the filter should operate to reduce the noise. Using an edge detection technique, a decision directed adaptive filter can vary the filtering proportional to the amount of edge information detected. We show an approach using an entropy measure on edges to differentiate between variations in the image due to edge information as compared against noise. The method uses entropy calculated against the spatial contour variations of edges in the window.

Paper Details

Date Published: 1 December 1991
PDF: 12 pages
Proc. SPIE 1565, Adaptive Signal Processing, (1 December 1991); doi: 10.1117/12.49765
Show Author Affiliations
Harley R. Myler, Univ. of Central Florida (United States)
Arthur Robert Weeks, Univ. of Central Florida (United States)
Michelle Van Dyke-Lewis, Univ. of Central Florida (United States)

Published in SPIE Proceedings Vol. 1565:
Adaptive Signal Processing
Simon Haykin, Editor(s)

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