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dc.contributor.authorChamorro Martínez, Jesús
dc.contributor.authorSánchez Fernández, Daniel
dc.contributor.authorPrados Suárez, Belen
dc.contributor.authorGalán Perales, Elena
dc.contributor.authorVila Miranda, María Amparo
dc.date.accessioned2006-05-31T16:19:05Z
dc.date.available2006-05-31T16:19:05Z
dc.date.issued2003
dc.identifier.issn1134-5632
dc.identifier.urihttp://hdl.handle.net/2099/1740
dc.description.abstractIn this paper we deal with two problems related to imprecision in colour image segmentation processes: to decide whether a set of pixels verify the property "to be homogeneously coloured", and to represent the set of possible segmentations of an image at different precision levels. In order to solve the first problem we introduce a measure of distance between colours in the CIE L*a*b* space, that allows us to measure the degree of homogeneity of two pixels p and q on the basis of the maximum distance between the colours of consecutive pairs of pixels in any path linking p and q . Since homogeneity is a matter of degree, we define a (fuzzy) segmentation of an image as a set of fuzzy regions, each of them being a fuzzy subset of pixels, that we obtain by using a region growing technique. The membership degree of each pixel to each region is calculated on the basis of our homogeneity measure. The second problem is solved by introducing a fuzzy similarity relation between the fuzzy regions in this initial segmentation. The different α-cuts of the similarity relation define the set of precision levels, from which a nested hierarchy of fuzzy segmentations is finally obtained.
dc.format.extent101-115
dc.language.isoeng
dc.publisherUniversitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica.
dc.relation.ispartofMathware & soft computing, 2003, vol. 10, núm. 2 [ -3 ]
dc.rightsReconeixement-NoComercial-CompartirIgual 3.0 Espanya
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.otherColour image segmentation
dc.subject.otherFuzzy segmentation
dc.subject.otherHierarchical segmentation
dc.subject.otherColour distance
dc.titleSegmenting colour images on the basis of a fuzzy hierarchical approach
dc.typeArticle
dc.subject.lemacImatges -- Processament -- Tècniques digitals -- Models matemàtics
dc.subject.lemacVisió artificial (Robòtica)
dc.subject.lemacLògica difusa
dc.subject.lemacColor -- Processament de dades
dc.subject.amsClassificació AMS::68 Computer science::68U Computing methodologies and applications
dc.rights.accessOpen Access


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