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	Provedor de dados ArchiMer (2) Autor Brandou, Vincent (1) Espiau, Francois-xavier (1) Palavra-chave Computer vision (2) Vision par ordinateur (2) 3D metrology (1) 3D reconstruction (1) Appariement robuste (1) Approche multi échelles (1) Asservissement visuel (1) Camera trajectory (1) Images sous marines (1) Interest points (1) Multi scale approach (1) Métrologie 3D (1) Points d'intérêt (1) Projective reconstruction (1) Reconstruction 3D (1) Reconstruction projective (1) Robust matching (1) Stereovision system (1) Stéréovision (1) Trajectoire d'acquisition (1) Mais... Tipo do documento Text (2) Ano 2008 (1) 2002 (1) País France (2) Idioma Francês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Stéréovision Locale et Reconstruction 3D/4D ArchiMer Brandou, Vincent. The aim of this study is to propose a complete 3-dimension reconstruction method of natural submarine objects improved by a new acquisition method for quantitative measures, which can be used in operational conditions. First, it was necessary to take into account the various problems connected with the deep sea environment; the main constraint is that the system used to collect images must be manipulated at very important depths, up to 6000 meters by an underwater vehicle positioned on the sea floor. Thus, a method allowing the automatic acquisition of images was developed, adapted to any type of small-scale submarine object (approximately 1m3). The image acquisition is performed with a stereovision system operated by a manipulator arm. The method that we... Tipo: Text Palavras-chave: 3D reconstruction; Camera trajectory; Visual servoing; Stereovision system; Computer vision; 3D metrology; Reconstruction 3D; Trajectoire d'acquisition; Asservissement visuel; Stéréovision; Vision par ordinateur; Métrologie 3D. Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-6478.pdf Métrologie 3D par vision active sur des objets naturels sous-marins ArchiMer Espiau, Francois-xavier. This PhD Thesis concerns the application of computer vision techniques to natural underwater images. Recently, advances in projective geometry have given a strong formalism to computer vision reconstruction algorithms and has allowed real improvements. Nevertheless, many algorithms may have problems with natural scenes. We present here a complete methodology to make a projective reconstruction of natural scenes from underwater images taken with one uncalibrated camera. In the first step, we are interested in extracting robust features which is a necessary step of image processing. Due to the particular scenes we observe (no geometric simple forms, high noise, no knowledge of the environment), we choose a robust implementation of a point detector based... Tipo: Text Palavras-chave: Underwater images; Robust matching; Multi scale approach; Interest points; Projective reconstruction; Computer vision; Images sous marines; Appariement robuste; Approche multi échelles; Points d'intérêt; Reconstruction projective; Vision par ordinateur. Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/these-302.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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