Publications associées à Radiotélescope

A Fourier dimensionality reduction model for big data interferometric imaging

Jean-Philippe Thiran, Yves Wiaux, Rafael Eduardo Carrillo Rangel, Vijay Kartik

Data dimensionality reduction in radio interferometry can provide savings of computational resources for image reconstruction through reduced memory footprints and lighter computations per iteration, which is important for the scalability of imaging method ...

Oxford Univ Press2017

Imaging in radio interferometry by iterative subset scanning using a modified amp algorithm

Paul Hurley, Matthieu Martin Jean-André Simeoni, Giovanni Cherubini, Sanaz Kazemi

Imaging techniques in radio interferometry often face a significant challenge posed by the large number of antenna signals received, from which the image information needs to be extracted. Beam- forming is envisaged to reduce the rate required for transpor ...

2016

On Flexibeam for radio interferometry

Paul Hurley, Matthieu Martin Jean-André Simeoni

Beamforming in radio astronomy focuses at and around a direction using matched beamforming or a derivative, to both maximise the energy coming from this point and reduce the data rate to the central processor. Such beamformers often result in large side-lo ...

2016

A randomised primal-dual algorithm for distributed radio-interferometric imaging

Yves Wiaux, Rafael Eduardo Carrillo Rangel, Jason Douglas McEwen

Next generation radio telescopes, like the Square Kilometre Array, will acquire an unprecedented amount of data for radio astronomy. The development of fast, parallelisable or distributed algorithms for handling such large-scale data sets is of prime impor ...

Ieee2016

Robust sparse image reconstruction of radio interferometric observations with PURIFY

Yves Wiaux, Rafael Eduardo Carrillo Rangel, Jason Douglas McEwen

Next-generation radio interferometers, such as the Square Kilometre Array (SKA), will revolutionise our understanding of the universe through their unprecedented sensitivity and resolution. However, to realise these goals significant challenges in image an ...

Wiley-Blackwell2016

Morphological component analysis for sparse regularization in plane wave imaging

Jean-Philippe Thiran, Yves Wiaux, Dimitris Perdios, Eric Bezzam, Rafael Eduardo Carrillo Rangel, Marcel Arditi, Adrien Georges Jean Besson

Classical ultrasound image reconstruction mainly relies on the well-known delay-and-sum (DAS) beamforming for its simplicity and real-time capability. Sparse regularization methods propose an alternative to DAS which lead to a better inversion of the ill-p ...

Ieee2016

Iterative image subset scanning for image reconstruction from sensor signals

Paul Hurley, Matthieu Martin Jean-André Simeoni, Giovanni Cherubini, Sanaz Kazemi

Image reconstruction techniques from signals received by sensors find application in several fields, including radio interferometry for astronomical investigations and magnetic resonance imaging for medical applications. This paper presents a novel method ...

2015

Dimension embedding for big data in radio interferometry

Yves Wiaux, Rafael Eduardo Carrillo Rangel, Vijay Kartik

As radio telescope data is now increasingly high-dimensional, data reduction has become essential to reduce computational load while preserving accurate signal reconstruction. Gridding the continuous Fourier visibilities represents the standard approach to ...

2015

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Radiotélescope

A Fourier dimensionality reduction model for big data interferometric imaging

Imaging in radio interferometry by iterative subset scanning using a modified amp algorithm

On Flexibeam for radio interferometry

A randomised primal-dual algorithm for distributed radio-interferometric imaging

Robust sparse image reconstruction of radio interferometric observations with PURIFY

The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula

Morphological component analysis for sparse regularization in plane wave imaging

Iterative image subset scanning for image reconstruction from sensor signals

Dimension embedding for big data in radio interferometry

Towards More Accurate and Efficient Beamformed Radio Interferometry Imaging

Graph Chatbot

Chattez avec Graph Search

Towards More Accurate and Efficient Beamformed Radio Interferometry Imaging

A Fourier dimensionality reduction model for big data interferometric imaging

Imaging in radio interferometry by iterative subset scanning using a modified amp algorithm

On Flexibeam for radio interferometry

A randomised primal-dual algorithm for distributed radio-interferometric imaging

Robust sparse image reconstruction of radio interferometric observations with PURIFY

The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula

Morphological component analysis for sparse regularization in plane wave imaging

Iterative image subset scanning for image reconstruction from sensor signals

Dimension embedding for big data in radio interferometry