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Wavelet analysis has been found to be a powerful tool for the nonparametric estimation of spatially-variable objects. We discuss in detail wavelet methods in nonparametric regression, where the data are modelled as observations of a signal contaminated with additive Gaussian noise, and provide an extensive review of the vast literature of wavelet shrinkage… (More)

- Claire Boyer, Jérémie Bigot, Pierre Weiss
- ArXiv
- 2015

Compressed Sensing (CS) is an appealing framework for applications such as Magnetic Resonance Imaging (MRI). However, up-to-date, the sensing schemes suggested by CS theories are made of random isolated measurements, which are usually incompatible with the physics of acquisition. To reflect the physical constraints of the imaging device, we introduce the… (More)

The goal of this paper is to review existing methods for protein mass spectrometry data analysis, and to present a new methodology for automatic extraction of significant peaks (biomarkers). For the pre-processing step required for data from MALDI-TOF or SELDITOF spectra, we use a purely nonparametric approach that combines stationary invariant wavelet… (More)

- Jérémie Bigot, Marieke Longcamp, Fabien Dal Maso, David Amarantini
- NeuroImage
- 2011

The study of the correlations that may exist between neurophysiological signals is at the heart of modern techniques for data analysis in neuroscience. Wavelet coherence is a popular method to construct a time-frequency map that can be used to analyze the time-frequency correlations between two time series. Coherence is a normalized measure of dependence,… (More)

- Jérémie Bigot, Sébastien Gadat, Jean-Michel Loubes
- Journal of Mathematical Imaging and Vision
- 2009

The problem of defining appropriate distances between shapes or images and modeling the variability of natural images by group transformations is at the heart of modern image analysis. A current trend is the study of probabilistic and statistical aspects of deformation models, and the development of consistent statistical procedure for the estimation of… (More)

Anestis Antoniadis∗ , Sophie Lambert-Lacroix and Frédérique Letué, Laboratoire IMAG-LMC, University Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France and Jérémie Bigot University Paul Sabatier, Toulouse, France. Abstract The objective of this paper is to contribute to the methodology available for extracting and analyzing signal content from protein… (More)

- Jérémie Bigot
- 2005

This paper is concerned with the problem of determining the typical features of a curve when it is observed with noise. It has been shown that one can characterize the Lipschitz singularities of a signal by following the propagation across scales of the modulus maxima of its continuous wavelet transform. A nonparametric approach, based on appropriate… (More)

- Jérémie Bigot
- 2013

To cite this version: Bigot, Jérémie Landmark-Based Registration of Curves via the Continuous Wavelet Transform. (2006) Journal of Computational and Graphical Statistics, vol. 15 (n° 3). pp. 542-564. ISSN 1061-8600 Open Archive Toulouse Archive Ouverte (OATAO) OATAO is an open access repository that collects the work of Toulouse researchers and makes it… (More)

- Jérémie Bigot, Rolando J. Biscay, Jean-Michel Loubes, Lilian Muñiz-Alvarez
- Journal of Machine Learning Research
- 2011

In this paper, we consider the Group Lasso estimator of the covariance matrix of a stochastic process corrupted by an additive noise. We propose to estimate the covariance matrix in a highdimensional setting under the assumption that the process has a sparse representation in a large dictionary of basis functions. Using a matrix regression model, we propose… (More)

We define a notion of barycenter for random probability measures in the Wasserstein space. We study the population barycenter in terms of existence and uniqueness. Using a duality argument, we give a precise characterization of the population barycenter for compactly supported measures, and we make a connection between averaging in the Wasserstein space and… (More)