Data/hora: 09/06/2024 01:24:45

Provedor de dados: 	5	
País: 	France	
Título: 	Region based variational approach for the segmentation textured sonar images	
Autores: 	Karoui, Imen; Fablet, Ronan; Boucher, Jean-marc; Augustin, Jean-marie.	
Data: 	2008-12	
Ano: 	2008	
Palavras-chave: 	Level sets; Active regions; Segmentation; Angular backscattering; Feature selection; Sonar images; Texture.	
Resumo: 	We propose a new region-based segmentation of textured sonar images with respect to seafloor types. We characterize sea-floor types by a set of empirical distributions estimated on texture responses to a set of different filters and we introduce a novel similarity measure between sonar textures in this attribute space. Our similarity measure is defined as a weighted sum of Kullback-Leibler divergences between texture features. The texture similarity measure weight setting is twofold: first we weight each filter, according to its discrimination power, the computation of these weights are issued from the margin maximization criterion, Second, we add an additional weighting, evaluated as an angular distance between the incidence angles of the compared texture samples, to cope with the problem related to the sonar image acquisition process that leads to a variability of the backscattered (BS) value and the texture aspect with the incidence angle range, Our segmentation method is stated as the minimization of a region-based functional that involves the similarity between region texture based statistics and prototype ones and a regularization term that imposes smoothness and regularity on region boundaries. The proposed approach is implemented using level-set methods, and the functional minimization is done using shape derivative tools.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2008/publication-6120.pdf	
Editor: 	GRETSI	
Relação: 	http://archimer.ifremer.fr/doc/00000/6120/	
Formato: 	application/pdf	
Fonte: 	Traitement du signal (0765-0019) (GRETSI), 2008-12 , Vol. 25 , N. 1-2 , P. 73-85	
Fonte: 	2008 GRETSI, Saint Martin d'Hères, France