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An elevation of fractal methods for characterizing image complexity / Nina S.N. Lam in Cartography and Geographic Information Science, vol 29 n° 1 (January 2002)  

Public [article]  inCartography and Geographic Information Science > vol 29 n° 1 (January 2002) . - pp 25 - 35 Titre : An elevation of fractal methods for characterizing image complexity Type de document : Article/Communication Auteurs : Nina S.N. Lam, Auteur ; H.L. Qiu, Auteur ; et al., Auteur Année de publication : 2002 Article en page(s) : pp 25 - 35 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] autocorrélation spatiale [Termes IGN] complexité [Termes IGN] dimension fractale [Termes IGN] exploration de données [Termes IGN] objet fractal [Termes IGN] simulation de surface Résumé : (Auteur) Previously, we developed an integrated software package called ICAMS (Image Characterization and Modeling System) to provide specialized spatial analytical functions for interpreting remote sensing data. This paper evaluates three fractal dimension measurement methods that have been implemented in ICAMS: isarithm, variogram, and a modified version of triangular prism. To provide insights into how the fractal methods compare with conventional spatial techniques in measuring landscape complexity, the performance of two spatial autocorrelation methods, Moran's 1 and Geary's C, is also evaluated. Results from analyzing 25 simulated surfaces having known fractal dimensions show that both the isarithm and triangular prism methods can accurately measure a range of fractal surfaces. The triangular prism method is most accurate at estimating the fractal dimension of surfaces having higher spatial complexity, but it is sensitive to contrast stretching. The variogram method is a comparatively poor estimator for all surfaces, particularly those with high tractor dimensions. As with the fractal techniques, spatial autocorrelation techniques have been found to be useful for measuring complex images, but not images with low dimensionality. Fractal measurement methods, as well as spatial autocorrelation techniques, can be applied directly to unclassified images and could serve as a tool for change detection and data mining. Numéro de notice : A2002-048 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1559/152304002782064600 En ligne : https://doi.org/10.1559/152304002782064600 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21965 [article]

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