Título: U-array: Extensão da U-matrix para Mapas Auto-Organizáveis com Espaço de Saída 3-D
Autores: Costa, José Alfredo Ferreira; Andrade Netto, Márcio Luiz de
Resumo: The self-organizing map (SOM) has been widely used as a software tool for visualization of highdimensional data. Important SOM features include information compression while trying to preserve topological and metric relationship of the primary data items. As the SOM networks are used extensively for data display, usually the output grid is 2-D. The assumption of topological preservation in SOM is not true for many data mappings involving dimension reduction. With the automation of cluster detection in SOM, higher output dimensions can be used in problems involving discovery of classes in multidimensional data. This paper presents the U-array as an extension of the U-matrix for 3-D SOM output grids. The algorithm uses the watershed transform as well as a heuristic approach for determining the image markers to perform volume segmentation. Examples of automatic class discovery using U-arrays are also presented.
Código DOI: 10.21528/CBRN2005-214
Artigo em PDF: CBRN2005_214.pdf
Arquivo BibTex: CBRN2005_214.bib