Space-time Reconstruction of Oceanic Sea States via Variational Stereo Methods

Gallego Bonet, Guillermo; Yezzi, Anthony; Fedele, Francesco y Benetazzo, Alvise (2012). Space-time Reconstruction of Oceanic Sea States via Variational Stereo Methods. En: "The 22nd International Ocean and Polar Engineering Conference", 17/06/2012 - 22/06/2012, Rhodes, Greece 17-22 Jun 2012.

Descripción

Título: Space-time Reconstruction of Oceanic Sea States via Variational Stereo Methods
Autor/es:
  • Gallego Bonet, Guillermo
  • Yezzi, Anthony
  • Fedele, Francesco
  • Benetazzo, Alvise
Tipo de Documento: Ponencia en Congreso o Jornada (Charla)
Título del Evento: The 22nd International Ocean and Polar Engineering Conference
Fechas del Evento: 17/06/2012 - 22/06/2012
Lugar del Evento: Rhodes, Greece 17-22 Jun 2012
Título del Libro: Proceedings of the ISOPE 22nd International Ocean and Polar Engineering Conference
Fecha: Marzo 2012
Materias:
Palabras Clave Informales: Marine technology, remote sensing, hydrodynamics, stereo vision, image processing, variational methods, multigrid methods.
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Señales, Sistemas y Radiocomunicaciones
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

We present a remote sensing observational method for the measurement of the spatio-temporal dynamics of ocean waves. Variational techniques are used to recover a coherent space-time reconstruction of oceanic sea states given stereo video imagery. The stereoscopic reconstruction problem is expressed in a variational optimization framework. There, we design an energy functional whose minimizer is the desired temporal sequence of wave heights. The functional combines photometric observations as well as spatial and temporal regularizers. A nested iterative scheme is devised to numerically solve, via 3-D multigrid methods, the system of partial differential equations resulting from the optimality condition of the energy functional. The output of our method is the coherent, simultaneous estimation of the wave surface height and radiance at multiple snapshots. We demonstrate our algorithm on real data collected off-shore. Statistical and spectral analysis are performed. Comparison with respect to an existing sequential method is analyzed.

Más información

ID de Registro: 10741
Identificador DC: http://oa.upm.es/10741/
Identificador OAI: oai:oa.upm.es:10741
URL Oficial: http://www.isope.org/
Depositado por: Dr Guillermo Gallego Bonet
Depositado el: 24 Abr 2012 13:51
Ultima Modificación: 20 Abr 2016 18:58
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