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Communication Dans Un Congrès Année : 2012

Sparse reconstruction techniques for near-field underwater acoustic imaging

Résumé

The use of sparse priors has shown interesting potential in various acoustic or radar imaging applications. In this paper, sparse reconstruction is applied for underwater acoustic imaging using a newly built flexible sonar device. We investigate several models concerning the linear mapping between the image domain and the observation domain. In particular, we define a point-scatterer model in which the apparent back-scatter coefficient of a given reflector varies with respect to the specific emitter and receiver locations. To handle this problem, we adapt a multi-channel version of the orthogonal matching pursuit and we apply it on real data in order to obtain images of an underwater target placed at a small distance from the sonar. The techniques are shown to overcome bottlenecks that are apparent with more standard approaches that assume far-field conditions when building the image.
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Dates et versions

hal-00810911 , version 1 (23-04-2012)

Identifiants

  • HAL Id : hal-00810911 , version 1

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Nikolaos Stefanakis, Jacques Marchal, Valentin Emiya, Nancy Bertin, Rémi Gribonval, et al.. Sparse reconstruction techniques for near-field underwater acoustic imaging. Acoustics 2012, Apr 2012, Nantes, France. pp.1617. ⟨hal-00810911⟩
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