title: The effect of median filtering on edge estimation and detection.
abstract: In this paper we consider the effect of median prefiltering on the subsequent estimation and detection of edges in digital images. Where possible, a quantitative statistical comparison is made for a number of filters defined with two-dimensional geometries; in some cases one-dimensional analyses are required to illustrate certain points. Noise images prefiltered by median filters defined with a variety of windowing geometries are used to support the analysis, and it is found that median prefiltering improves the performance of both thresholding and zero-crossing based edge detectors.
authors.affiliation: Coordinated Science Laboratory, Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL 61801; Department of Electrical and Computer Engineering, Univ.
authors.forename: A C
authors.initials: AC
authors.lastname: Bovik
authors.forename: T S
authors.initials: TS
authors.lastname: Huang
authors.forename: D C
authors.initials: DC
authors.lastname: Munson