title: An improved median filter.
abstract: A modified median filtering technique offering improved smoothing performance while maintaining the edge-preserving ability of the conventional median filter is presented. It is shown how a mean filter outperforms a median filter in noise reduction except on or near the image boundaries. Along with the edge-preserving ability of the median filter, this observation forms the basis of the three-stage filtering algorithm which is described.
authors.affiliation: Dept. of Eng., Reading Univ.
authors.forename: P K
authors.initials: PK
authors.lastname: Sinha
authors.forename: Q H
authors.initials: QH
authors.lastname: Hong