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Detecting water bodies on Radarsat imagery / G. Kuang in Geomatica, vol 65 n° 1 (March 2011)  

Public [article]  inGeomatica > vol 65 n° 1 (March 2011) . - pp 15 - 25 Titre : Detecting water bodies on Radarsat imagery Type de document : Article/Communication Auteurs : G. Kuang, Auteur ; J. Li, Auteur ; Z. He, Auteur Année de publication : 2011 Article en page(s) : pp 15 - 25 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] détection de contours [Termes IGN] image radar moirée [Termes IGN] image Radarsat [Termes IGN] plan d'eau [Termes IGN] précision des données Résumé : (Auteur) This paper presents a novel geodesic active contour (GAC) model based on an edge detector for rapid detection of water bodies from spaceborne synthetic aperture radar (SAR) imagery with high speckle noise. The original edge indicator function based on gradients is replaced by an edge indicator function based on the ratio of exponentially weighted averages (ROEWA) operator. Thus, the capability of edge detection and the accuracy of locating edges are greatly improved, which makes the model more appropriate for SAR images. In addition, an enhancing term is added to the original model’s energy function in order to boost the strength for the contour’s evolution. An unconditionally stable additive operator splitting (AOS) scheme and a fast algorithm for re-initialization of the level set function are adopted, which not only enhances the model’s stability, but also speeds up the model’s convergence remarkably. The experimental results on simulated and real RADARSAT-1/-2 images show its efficiency and accuracy. Numéro de notice : A2011-537 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.5623/cig2011-005 En ligne : https://cdnsciencepub.com/doi/pdf/10.5623/cig2011-005 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31431 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
035-2011011	RAB	Revue	Centre de documentation	En réserve L003	Disponible