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	Provedor de dados ArchiMer (2) Autor Bertino, L. (2) Andersen, O. (1) Bandeiras, J. (1) Camps, A. (1) Cardellach, E. (1) Catarino, N. (1) Chapron, Bertrand (1) Chauris, H. (1) Craneguy, Philippe (1) Foti, G. (1) Garreau, Pierre (1) Gommenginger, C. (1) Hatton, J. (1) Hoeg, P. (1) Jaeggi, A. (1) Karoui, Imen (1) Kern, M. (1) Lee, T. (1) Martin-neira, M. (1) Park, H. (1) Mais... Palavra-chave Circle detection (1) Circlet transform (1) Computer vision (1) GNSS (1) ISS (1) Image processing (1) Multi-scale representation (1) Oceanography (1) Reflectometry (1) Sea Surface Height (1) Mais... Tipo do documento Text (2) Ano 2016 (1) 2011 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última The circlet transform: A robust tool for detecting features with circular shapes ArchiMer Chauris, H.; Karoui, Imen; Garreau, Pierre; Wackernagel, H.; Craneguy, Philippe; Bertino, L.. We present a novel method for detecting circles on digital images. This transform is called the circlet transform and can be seen as an extension of classical 1D wavelets to 2D; each basic element is a circle convolved by a 1D oscillating function. In comparison with other circle-detector methods, mainly the Hough transform, the circlet transform takes into account the finite frequency aspect of the data; a circular shape is not restricted to a circle but has a certain width. The transform operates directly on image gradient and does not need further binary segmentation. The implementation is efficient as it consists of a few fast Fourier transforms. The circlet transform is coupled with a soft-thresholding process and applied to a series of real images... Tipo: Text Palavras-chave: Circlet transform; Circle detection; Image processing; Multi-scale representation; Computer vision. Ano: 2011 URL: http://archimer.ifremer.fr/doc/00033/14451/11752.pdf Innovative sea surface monitoring with GNSS-REflectometry aboard ISS: Overview and recent results from GEROS-ISS ArchiMer Wickert, Jens; Andersen, O.; Bandeiras, J.; Bertino, L.; Cardellach, E.; Camps, A.; Catarino, N.; Chapron, Bertrand; Foti, G.; Gommenginger, C.; Hatton, J.; Hoeg, P.; Jaeggi, A.; Kern, M.; Lee, T.; Martin-neira, M.; Park, H.; Pierdicca, N.; Rosello, J.; Semmling, M.; Shum, C. K.; Zuffada, C.; Soulat, F.; Sousa, A.; Xi, J.. GEROS-ISS (GEROS hereafter) stands for GNSS REflectometry, Radio Occultation and Scatterometry onboard the International Space Station. It is a scientific experiment, proposed to the European Space Agency (ESA) in 2011 for installation aboard the ISS. The main focus of GEROS is the dedicated use of signals from the currently available Global Navigation Satellite Systems (GNSS) for remote sensing of the System Earth with focus to Climate Change characterisation. The GEROS mission idea and the current status are briefly reviewed. Tipo: Text Palavras-chave: GNSS; Reflectometry; ISS; Sea Surface Height; Oceanography. Ano: 2016 URL: http://archimer.ifremer.fr/doc/00377/48799/49606.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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