We propose a novel remote sensing technique that infers the three-dimensional wave form and radiance of oceanic sea states via a variational stereo imagery formulation. In this setting, the shape and radiance of the wave surface are minimizers of a composite cost functional which combines a data fidelity term and smoothness priors on the unknowns. The solution of a system of coupled partial differential equations derived from the cost functional yields the desired ocean surface shape and radiance. The proposed method is naturally extended to study the spatiotemporal dynamics of ocean waves, and applied to three sets of video data. Statistical and spectral analysis are carried out. The results shows evidence of the fact that the omni-directional wavenumber spectrum S(k) of the reconstructed waves decays as k−2.5 in agreement with Zakharov’s theory (1999). Further, the three-dimensional spectrum of the reconstructed wave surface is exploited to estimate wave dispersion and currents.
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ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
June 19–24, 2011
Rotterdam, The Netherlands
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4438-0
PROCEEDINGS PAPER
A Variational Wave Acquisition Stereo System for the 3-D Reconstruction of Oceanic Sea States Available to Purchase
Guillermo Gallego,
Guillermo Gallego
Georgia Institute of Technology, Atlanta, GA
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Anthony Yezzi,
Anthony Yezzi
Georgia Institute of Technology, Atlanta, GA
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Francesco Fedele,
Francesco Fedele
Georgia Institute of Technology, Savannah, GA
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Alvise Benetazzo
Alvise Benetazzo
CNR-ISMAR, Venice, Italy
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Guillermo Gallego
Georgia Institute of Technology, Atlanta, GA
Anthony Yezzi
Georgia Institute of Technology, Atlanta, GA
Francesco Fedele
Georgia Institute of Technology, Savannah, GA
Alvise Benetazzo
CNR-ISMAR, Venice, Italy
Paper No:
OMAE2011-49061, pp. 27-36; 10 pages
Published Online:
October 31, 2011
Citation
Gallego, G, Yezzi, A, Fedele, F, & Benetazzo, A. "A Variational Wave Acquisition Stereo System for the 3-D Reconstruction of Oceanic Sea States." Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. Volume 6: Ocean Engineering. Rotterdam, The Netherlands. June 19–24, 2011. pp. 27-36. ASME. https://doi.org/10.1115/OMAE2011-49061
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