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

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

Description

Title: Space-time Reconstruction of Oceanic Sea States via Variational Stereo Methods
Author/s:
  • Gallego Bonet, Guillermo
  • Yezzi, Anthony
  • Fedele, Francesco
  • Benetazzo, Alvise
Item Type: Presentation at Congress or Conference (Speech)
Event Title: The 22nd International Ocean and Polar Engineering Conference
Event Dates: 17/06/2012 - 22/06/2012
Event Location: Rhodes, Greece 17-22 Jun 2012
Title of Book: Proceedings of the ISOPE 22nd International Ocean and Polar Engineering Conference
Date: March 2012
Subjects:
Freetext Keywords: Marine technology, remote sensing, hydrodynamics, stereo vision, image processing, variational methods, multigrid methods.
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Señales, Sistemas y Radiocomunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 10741
DC Identifier: http://oa.upm.es/10741/
OAI Identifier: oai:oa.upm.es:10741
Official URL: http://www.isope.org/
Deposited by: Dr Guillermo Gallego Bonet
Deposited on: 24 Apr 2012 13:51
Last Modified: 20 Apr 2016 18:58
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