Publications related to Very-long-baseline interferometry

The varying w spread spectrum effect for radio interferometric imaging

Yves Wiaux, Rafael Eduardo Carrillo Rangel, Jason Douglas McEwen

We study the impact of the spread spectrum effect in radio interferometry on the quality of image reconstruction. This spread spectrum effect will be induced by the wide ﬁeld-of-view of forthcoming radio interferometric telescopes. The resulting chirp modu ...

2013

Sparsity Averaging Reweighted Analysis (SARA): a novel algorithm for radio-interferometric imaging

Yves Wiaux, Rafael Eduardo Carrillo Rangel, Jason Douglas McEwen

We propose a novel algorithm for image reconstruction in radio interferometry. The ill-posed inverse problem associated with the incomplete Fourier sampling identified by the visibility measurements is regularized by the assumption of average signal sparsi ...

Wiley-Blackwell2012

About the performance of multi-dimensional radial self-navigation incorporating compressed sensing for free-breathing coronary MRI

Yves Wiaux, Gilles Puy, Ruud van Heeswijk, Gabriele Vincenzo Bonanno

Respiratory motion is a major challenge in cardiac magnetic resonance imaging (MRI) and contemporary state-of-the-art motion compensation strategies like diaphragmatic navigators still suffer from sub-optimal time efficiency. In response, k-space- based on ...

2012

Compressed sensing for radio interferometric imaging: review and future

Yves Wiaux, Jason Douglas McEwen

Radio interferometry is a powerful technique for astronomical imaging. The theory of compressed sensing (CS) has been applied recently to the ill-posed inverse problem of recovering images from the measurements taken by radio interferometric telescopes. We ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2011

COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses

Frédéric Courbin, Georges Meylan, Yves Revaz, Malte Tewes

We present accurate time delays for the quadruply imaged quasar HE 0435-1223. The delays were measured from 575 independent photometric points obtained in the R-band between January 2004 and March 2010. With seven years of data, we clearly show that quasar ...

2011

Spread spectrum for interferometric and magnetic resonance imaging

Jean-Philippe Thiran, Rolf Gruetter, Pierre Vandergheynst, Dimitri Nestor Alice Van De Ville, Yves Wiaux, Gilles Puy

We consider images probed through incomplete and noisy Fourier coverages, both in the context of radio interferometry (RI) and of magnetic resonance imaging (MRI). We show that the quality of signal reconstruction can be signiﬁcantly enhanced by the introd ...

IEEE Signal Process. Soc.2010

Compressed sensing reconstruction of a string signal from interferometric observations of the cosmic microwave background

Pierre Vandergheynst, Yves Wiaux, Gilles Puy

We propose an algorithm for the reconstruction of the signal induced by cosmic strings in the cosmic microwave background (CMB), from radio-interferometric data at arcminute resolution. Radio interferometry provides incomplete and noisy Fourier measurement ...

Wiley-Blackwell2010

Compressed sensing for radio interferometry: prior-enhanced Basis Pursuit imaging techniques

Pierre Vandergheynst, Yves Wiaux, Gilles Puy, Laurent Jacques

We propose and assess the performance of new imaging techniques for radio interferometry that rely on the versatility of the compressed sensing framework to account for prior information on the signals. The present manuscript represents a summary of recent ...

2009

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Very-long-baseline interferometry

The varying w spread spectrum effect for radio interferometric imaging

Sparsity Averaging Reweighted Analysis (SARA): a novel algorithm for radio-interferometric imaging

About the performance of multi-dimensional radial self-navigation incorporating compressed sensing for free-breathing coronary MRI

Compressed sensing for radio interferometric imaging: review and future

COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses

Exploiting Long-Term Observations for Track Creation and Deletion in Online Multi-Face Tracking

Exploiting Long-Term Observations for Track Creation and Deletion in Online Multi-Face Tracking

Spread spectrum for interferometric and magnetic resonance imaging

Compressed sensing reconstruction of a string signal from interferometric observations of the cosmic microwave background

Compressed sensing for radio interferometry: prior-enhanced Basis Pursuit imaging techniques

Graph Chatbot

Chat with Graph Search

COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses

Spread spectrum for interferometric and magnetic resonance imaging

Exploiting Long-Term Observations for Track Creation and Deletion in Online Multi-Face Tracking

Sparsity Averaging Reweighted Analysis (SARA): a novel algorithm for radio-interferometric imaging

Exploiting Long-Term Observations for Track Creation and Deletion in Online Multi-Face Tracking

The varying w spread spectrum effect for radio interferometric imaging

About the performance of multi-dimensional radial self-navigation incorporating compressed sensing for free-breathing coronary MRI

Compressed sensing for radio interferometric imaging: review and future

Compressed sensing reconstruction of a string signal from interferometric observations of the cosmic microwave background

Compressed sensing for radio interferometry: prior-enhanced Basis Pursuit imaging techniques