title: Fuzzy two-step filter for impulse noise reduction from color images.
abstract: A new framework for reducing impulse noise from digital color images is presented, in which a fuzzy detection phase is followed by an iterative fuzzy filtering technique. We call this filter the fuzzy two-step color filter. The fuzzy detection method is mainly based on the calculation of fuzzy gradient values and on fuzzy reasoning. This phase determines three separate membership functions that are passed to the filtering step. These membership functions will be used as a representation of the fuzzy set impulse noise (one function for each color component). Our proposed new fuzzy method is especially developed for reducing impulse noise from color images while preserving details and texture. Experiments show that the proposed filter can be used for efficient removal of impulse noise from color images without distorting the useful information in the image.
authors.affiliation: Fuzziness and Uncertainty Modelling Research Unit, Department of Applied Mathematics and Computer Science, Ghent University, B-9000 Ghent, Belgium. stefan.schulte@ugent.be
authors.forename: Stefan
authors.initials: S
authors.lastname: Schulte
authors.forename: Valérie
authors.initials: V
authors.lastname: De Witte
authors.forename: Mike
authors.initials: M
authors.lastname: Nachtegael
authors.forename: Dietrich
authors.initials: D
authors.lastname: Van der Weken
authors.forename: Etienne E
authors.initials: EE
authors.lastname: Kerre
mesh_terms: D000465:Algorithms; D016477:Artifacts; D003116:Color; D003124:Colorimetry / Q000379:methods*; D017143:Fuzzy Logic; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods; D012815:Signal Processing, Computer-Assisted; D013269:Stochastic Processes