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	Provedor de dados ArchiMer (3) Autor Augustin, Jean-marie (2) Boucher, J.m. (1) Boucher, Jean-marc (1) Fablet, R (1) Fablet, Ronan (1) Karoui, I (1) Karoui, Imen (1) Leblond, Isabelle (1) Legris, M (1) Solaiman, B (1) Mais... Palavra-chave Segmentation (3) Sonar images (3) Active regions (2) Angular backscattering (2) Feature selection (2) Level sets (2) Texture (2) Classification (1) Filtres de Gabor (1) Gabor filters (1) Images sonar (1) MMP (1) Recalage (1) Registration (1) Mais... Tipo do documento Text (3) Ano 2009 (1) 2008 (2) País France (3) Idioma Inglês (2) Francês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Region based variational approach for the segmentation textured sonar images ArchiMer Karoui, Imen; Fablet, Ronan; Boucher, Jean-marc; Augustin, Jean-marie. 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... Tipo: Text Palavras-chave: Level sets; Active regions; Segmentation; Angular backscattering; Feature selection; Sonar images; Texture. Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6120.pdf Contribution of automatic classification of sonar images for long term registration ArchiMer Leblond, Isabelle; Legris, M; Solaiman, B. This issue handles the ability of using segmentation results of sidescan sonar images for long term registration. This study take a part of AUV (Autonomous Underwater Vehicle) navigation problems, particularly to correct the drift of navigation sensors. Principle of images formation with this type of engines and the main properties are first reminded. Some images are shown, which allows us to understand difficulties of this type of data to realise AUV positioning. Then, we decide that segmentation results of sidescan images provide us landscapes on which registration will be able. Segmentation is then explained. It is supervised type on five classes, rocks, ripples, sand, mud and shadow. Using Gabor filters provides classifying parameters and... Tipo: Text Palavras-chave: Gabor filters; Classification; Segmentation; Registration; Sonar images; Filtres de Gabor; Classification; Segmentation; Recalage; Images sonar. Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-5291.pdf Seabed segmentation using optimized statistics of sonar textures ArchiMer Karoui, I; Fablet, R; Boucher, J.m.; Augustin, Jean-marie. We propose and compare two supervised algorithms of the segmentation of textured sonar images with respect to seafloor types. We characterize sea-floors by a set of empirical distributions estimated on texture responses for a wide set of different filters with various parameterizations and we introduce a novel similarity measure between sonar textures in this feature space. Our similarity measure is defined as a weighted sum of Kullback-Leibler divergences between texture features. The weight setting is twofold. First each filter is weighted according to its discrimination power: the computation of these weights are issued from a margin maximization criterion. Second, an additional weight, evaluated as an angular distance between the incidence angles of... Tipo: Text Palavras-chave: Level sets; Active regions; MMP; Segmentation; Angular backscattering; Feature selection; Sonar images; Texture. Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6101.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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