1 | Laurent Jacques

Compressive Schlieren Deflectometry

Abstract: Schlieren deflectometry aims at characterizing the deflections undergone by refracted incident light rays at any surface point of a transparent object. For smooth surfaces, each surface location is actually associated with a sparse deflection map (or spectrum).

Prasad Sudhakara Murthy, Laurent Jacques, Xavier Dubois, Philippe Antoine, Luc Joannes

2013 Proceedings of ICASSP 2013

Consistent Iterative Hard Thresholding for Signal Declipping

Abstract: Clipping or saturation in audio signals is a very common problem in signal processing, for which, in the severe case, there is still no satisfactory solution. In such case, there is a tremendous loss of information, and traditional methods fail to appropriately recover the signal.

Srdjan Kitic, Laurent Jacques, Nilesh Madhu, Michael Peter Hopwood, Ann Spriet, Christophe De Vleeschouwer

2013 Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International Conference on

Quantized Iterative Hard Thresholding: Bridging 1-bit and High-Resolution Quantized Compressed Sensing

Abstract: In this work, we show that reconstructing a sparse signal from quantized compressive measurement can be achieved in an unified formalism whatever the (scalar) quantization resolution, i.e., from 1-bit to high resolution assumption.

Laurent Jacques, Kévin Degraux, Christophe De Vleeschouwer

2013 Proceedings of International Conference on Sampling Theory and Applications 2013, Bremen, Germany

Iterative Hypothesis Testing for Multi-object Tracking with Noisy/Missing Appearance Features

Abstract: This paper assumes prior detections of multiple targets at each time instant, and uses a graph-based approach to connect those de- tections across time, based on their position and appearance estimates.

Damien Delannay, Laurent Jacques, Christophe De Vleeschouwer

2012 11th Asian Conference on Computer Vision, Detection and Tracking in Challenging Environments Workshop, Daejeon, Korea, Lecture Notes in Computer Science, Vol. 7724-7727

Sparsity-driven optical deflection tomography with non-linear light ray propagation

Abstract: Optical deflection tomography based on phase-shifting Schlieren is well adapted for three-dimensional imaging of objects with large refractive index variations. We propose a reconstruction algorithm that takes into account light refraction and spatial sparsity of the sample.

Philippe Antoine, Emmanuel Foumouo, Jean-Luc Dewandel, Didier Beghuin, Adriana Gonzalez Gonzalez, Laurent Jacques

2012 Optimess 2012

TV-$\ell_{2}$ Refractive Index Map Reconstruction from Polar Domain Deflectometry

Adriana Gonzalez Gonzalez, Laurent Jacques, Philippe Antoine

2012 Proc. 1st international Traveling Workshop for Interacting Sparse models and Technology (iTWIST'12), Marseille, France

Compact Rotation Invariant Image Descriptors By Spectral Trimming

Abstract: Image descriptors are widely used in applications such as object recognition, pattern classification and image registration. The descriptors encode the local visual content of the image to provide a compact, robust and distinctive representation of objects.

Maxime Taquet, Laurent Jacques, Benoît Macq, Sylvain Jaume

2011 Image Processing (ICIP), 2011 18th IEEE International Conference on

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