Search Results - "Bourguignon, Sébastien"

Exact Sparse Approximation Problems via Mixed-Integer Programming: Formulations and Computational Performance by Bourguignon, Sebastien, Ninin, Jordan, Carfantan, Herve, Mongeau, Marcel

“…Sparse approximation addresses the problem of approximately fitting a linear model with a solution having as few non-zero components as possible. While most…”
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An Inverse Approach for Ultrasonic Imaging From Full Matrix Capture Data: Application to Resolution Enhancement in NDT by Laroche, Nans, Bourguignon, Sebastien, Carcreff, Ewen, Idier, Jerome, Duclos, Aroune

“…In the context of nondestructive testing (NDT), this article proposes an inverse problem approach for the reconstruction of high-resolution ultrasonic images…”
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Three-Dimensional Microwave Imaging: Fast and Accurate Computations with Block Resolution Algorithms by Friedrich, Corentin, Bourguignon, Sébastien, Idier, Jérôme, Goussard, Yves

“…This paper considers the microwave imaging reconstruction problem, based on additive penalization and gradient-based optimization. Each evaluation of the cost…”
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Efficiency of BRDF sampling and bias on the average photometric behavior by Schmidt, Frédéric, Bourguignon, Sébastien

“…•Definition of the efficiency of a set of geometries to constrain Hapke photometric parameters.•Best efficiency is principal plane with high incidence.•Study…”
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Techniques for accelerating branch-and-bound algorithms dedicated to sparse optimization by Samain, Gwenaël, Bourguignon, Sébastien, Ninin, Jordan

“…Sparse optimization-fitting data with a low-cardinality linear model-is addressed through the minimization of a cardinality-penalized least-squares function,…”
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Global optimization for sparse solution of least squares problems by Ben Mhenni, Ramzi, Bourguignon, Sébastien, Ninin, Jordan

“…Finding solutions to least-squares problems with low cardinality has found many applications, including portfolio optimization, subset selection in statistics,…”
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Joint inversion of electromagnetic measurements for the determination of water saturation profiles in concrete structures by Alhajj, Marie Antoinette, Bourguignon, Sébastien, Palma-Lopes, Sérgio, Villain, Géraldine

“…Water saturation profiles in concrete are essential to assess its durability and can be determined using non-destructive techniques, especially the electric…”
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Joint Reconstruction Strategy for Structured Illumination Microscopy With Unknown Illuminations by Labouesse, Simon, Negash, Awoke, Idier, Jerome, Bourguignon, Sebastien, Mangeat, Thomas, Penghuan Liu, Sentenac, Anne, Allain, Marc

“…The blind structured illumination microscopy strategy proposed by Mudry et al. is fully re-founded in this paper, unveiling the central role of the sparsity of…”
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A linear model approach for ultrasonic inverse problems with attenuation and dispersion by Carcreff, Ewen, Bourguignon, Sebastien, Idier, Jerome, Simon, Laurent

“…Ultrasonic inverse problems such as spike train deconvolution, synthetic aperture focusing, or tomography attempt to reconstruct spatial properties of an…”
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Detection and Separation of Close Flaws in Coarse-Grained Materials Using Ultrasonic Image Deconvolution by Laroche, Nans, Carcreff, Ewen, Bourguignon, Sébastien, Idier, Jérôme, Duclos, Aroune, Lhuillier, Pierre-Emile

“…Ultrasonic inspection of coarse-grained steels is a common challenge in various industrial fields. This task is often difficult because of acoustic scattering…”
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Fast Non-Stationary Deconvolution of Ultrasonic Beamformed Images for Nondestructive Testing by Laroche, Nans, Bourguignon, Sebastien, Idier, Jerome, Carcreff, Ewen, Duclos, Aroune

“…This paper addresses high-resolution ultrasonic image reconstruction from Full Matrix Capture (FMC) data in the context of nondestructive testing (NDT). In…”
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A Greedy Sparse Approximation Algorithm Based On L1-Norm Selection Rules by Mhenni, Ramzi Ben, Bourguignon, Sebastien, Idier, Jerome

“…We propose a new greedy sparse approximation algorithm, called SLS for Single L1 Selection, that addresses a least squares optimization problem under a…”
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A Sparsity-Based Method for the Estimation of Spectral Lines From Irregularly Sampled Data by Bourguignon, S., Carfantan, H., Idier, J.

“…We address the problem of estimating spectral lines from irregularly sampled data within the framework of sparse representations. Spectral analysis is…”
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Sparse Branch and Bound for Exact Optimization of L0-Norm Penalized Least Squares by Mhenni, Ramzi Ben, Bourguignon, Sebastien, Mongeau, Marcel, Ninin, Jordan, Carfantan, Herve

“…We propose a global optimization approach to solve ℓ 0 -norm penalized least-squares problems, using a dedicated branch-and-bound methodology. A specific tree…”
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Restoration of Astrophysical Spectra With Sparsity Constraints: Models and Algorithms by Bourguignon, S., Mary, D., Slezak, E.

“…We address the problem of joint signal restoration and parameter estimation in the context of the forthcoming MUSE instrument, which will provide spectroscopic…”
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Processing MUSE hyperspectral data: Denoising, deconvolution and detection of astrophysical sources by Bourguignon, Sébastien, Mary, David, Slezak, Éric

“…We address the problem of processing astronomical hyperspectral data cubes in the context of the forthcoming MUSE instrument. MUSE, which is under…”
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Methodological developments for improved bottom detection with the ME70 multibeam echosounder by Bourguignon, Sébastien, Berger, Laurent, Scalabrin, Carla, Fablet, Ronan, Mazauric, Valérie

“…Bourguignon, S., Berger, L., Scalabrin, C., Fablet, R., and Mazauric, V. 2009. Methodological developments for improved bottom detection with the ME70…”
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Fast inverse approach for the deconvolution of ultrasonic TFM images using a spatially varying PSF in NDT by Laroche, Nans, Bourguignon, Sebastien, Carcreff, Ewen, Idier, Jerome, Duclos, Aroune

“…Multi-element probes are widely used in Non-Destructive Testing (NDT) for their ability to produce images. Full Matrix Capture (FMC) is a standard acquisition…”
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Spectral Unmixing with Sparsity and Structuring Constraints by Mhenni, Ramzi Ben, Bourguignon, Sebastien, Ninin, Jordan, Schmidt, Frederic

“…This paper addresses the linear spectral unmixing problem, by incorporating different constraints that may be of interest in order to cope with spectral…”
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An Inverse Approach for Ultrasonic Imaging by Total Focusing Point for Close Reflectors Separation by Laroche, Nans, Carcreff, Ewen, Bourguignon, Sebastien, Idier, Jerome, Duclos, Aroune

“…The total focusing method (TFM) becomes a common approach in order to process full matrix capture data in nondestructive testing. This method consists in…”
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