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researResearch
IEM
Interpretation for marine environments
Aims and objectives throughout the project
Project Leader :
Didier Guériot
and
Christophe Sintes
Department:
• Image and Information
Processing
• Signal and communications
Project team:
Thierry Chonavel,
Didier Guériot,
Jean-Marc Le Caillec,
Grégoire Mercier,
Christophe Sintes,
Gérard Llort Pujol,
Xavier Lurton (IFRE MER),
Thierry Schmit (CIDCO),
Benoît Zerr (GESMA).
Up until the 1980s, seabed exploration was limited by the speed and precision
of sensors. Recent technological innovations make it possible to imagine
access to centimetre-level information in frequencies ranging from 10kHz to
500 kHz. The IEM project is concerned with the totality of processing, from
the sensor level up to the representation of an underwater scene and the
simulation of acoustic signals.
Our current research is concerned specifically with sensor processing (or
antenna processing) and simulation.
The difficulties associated with sensor processing concern the reduction of
noise level on (side scan or multi-faceted) interferometers by methods relying
on wave front modelling and on more extensive antenna use. The idea is to
proceed, by multifaceted interferometry, to the analysis of the phase statistics
and to performance production, to finalize the extraction of high resolution
relief, and to reduce noise level by auto-calibration of the antenna. Because
we are using side scan sonar interferometry, the next step is interferometry
and image fusion (bathymetry improvement) based on Kalman regularization.
Concerning simulation, the goal is to fusion together exact methods and rays
methods. Thanks to the installation of a new core based on energetic tube
launching. We also must handle the issue of bi-statism, as well as the passage
to dynamic charging of DTMs (Digital Terrain Models).
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