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Documents Associated With Scientific Events Year : 2012

Underwater acoustic imaging: sparse models and implementation issues

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Abstract

We present recent work on sparse models for underwater acoustic imaging and on implementation of imaging methods with real data. By considering physical issues like non-isotropic scattering and non-optimal calibration, we have designed several structured sparse models. Greedy algorithms are used to estimate the sparse representations. Our work includes the design of real experiments in a tank. Several series of data have been collected and processed. For such a realistic scenario, data and representations live in high-dimensional spaces. We introduce algorithmic adaptations to deal with the resulting computational issues. The imaging results obtained by our methods are finally compared to standard beamforming imaging.
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Dates and versions

hal-00677287 , version 1 (04-06-2012)

Identifiers

  • HAL Id : hal-00677287 , version 1

Cite

Valentin Emiya, Nikolaos Stefanakis, Jacques Marchal, Nancy Bertin, Rémi Gribonval, et al.. Underwater acoustic imaging: sparse models and implementation issues. International Travelling Workshop for Interacting Sparse Models and Technology, May 2012, Marseille, France. 2012. ⟨hal-00677287⟩
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