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Sparsity in tensor optimization for optical-interferometric imaging

Type of publication Peer-reviewed
Publikationsform Proceedings (peer-reviewed)
Publication date 2014
Author Auría Rasclosa Anna, Carrillo Rafael, Thiran Jean-Philippe, Wiaux Yves,
Project Advanced signal processing on the sphere for high angular resolution diffusion magnetic resonance imaging
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Proceedings (peer-reviewed)

Title of proceedings IEEE ICIP 2014
DOI 10.1109/ICIP.2014.7026216

Open Access

URL http://infoscience.epfl.ch/record/196611
Type of Open Access Website

Abstract

Image recovery in optical interferometry is an ill-posed nonlinear inverse problem arising from incomplete power spectrum and bispectrum measurements. We review our previous work, which reformulates this nonlinear problem in the framework of tensor recovery and studies two different approaches to solve it: one is nonlinear and nonconvex while the other is linear and convex. We extend the linear convex procedure to account for signal sparsity and we also present numerical simulations that show the improvement in the quality of reconstruction of sparse images when including a sparsity prior.
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