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A functional framework for sparse, non-gaussian signal processing and bioimaging

Obiettivo

"In recent years, the research focus in signal processing has shifted away from the classical linear paradigm, which is intimately linked with the theory of stationary Gaussian processes. Instead of considering Fourier transforms and performing quadratic optimization, researchers are presently favoring wavelet-like representations and have adopted ”sparsity” as design paradigm.

Our ambition is to develop a unifying operator-based framework for signal processing that would provide the ``sparse"" counterpart of the classical theory, which is currently missing. To that end, we shall specify and investigate sparse stochastic processes that are continuously-defined and ruled by differential equations, and construct corresponding wavelet-like sparsifying transforms. Our hope is to be able to rigorously connect non-quadratic regularization and sparsity-constrained optimization to well-defined continuous-domain statistical models. We also want to develop a novel Lie-group formalism for the design of steerable, signal-adapted wavelet transforms with improved invariance and sparsifying properties, both in 2-D and 3-D.

We shall use these tools to define new reversible image representations in terms of singular points (contours and keypoints) and to develop novel algorithms for 3-D biomedical image analysis. In close collaboration with imaging scientists, we shall apply our framework to the development of new 3-D reconstruction algorithms for emerging bioimaging modalities such as fluorescence deconvolution microscopy, digital holography microscopy, X-ray phase-contrast microscopy, and advanced MRI."

Invito a presentare proposte

ERC-2010-AdG_20100224
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Meccanismo di finanziamento

ERC-AG - ERC Advanced Grant

Istituzione ospitante

ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE
Contributo UE
€ 2 106 994,00
Indirizzo
BATIMENT CE 3316 STATION 1
1015 Lausanne
Svizzera

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Regione
Schweiz/Suisse/Svizzera Région lémanique Vaud
Tipo di attività
Higher or Secondary Education Establishments
Contatto amministrativo
Caroline Vandevyver (Ms.)
Ricercatore principale
Michael Unser (Prof.)
Collegamenti
Costo totale
Nessun dato

Beneficiari (1)