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Torsten Butz

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A multimodal approach to extract optimized audio features for speaker detection

Jean-Philippe Thiran, Murat Kunt, Torsten Butz, Patricia Besson

We present a method that exploits an information theoretic framework to extract optimal audio features with respect to the video features. A simple measure of mutual information between the resulting audio features and the video ones allows to detect the a ...

IEEE2005

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This paper presents a validation study on statistical non-supervised brain tissue classification techniques in MR images. Several image models assuming different hypotheses regarding the intensity distribution model, the spatial model and the number of cla ...

2005

From Error Probability to Information Theoretic (Multi-Modal) Signal Processing

Jean-Philippe Thiran, Torsten Butz

We propose an information theoretic model that unifies a wide range of existing information theoretic signal processing algorithms in a compact mathematical framework. It is mainly based on stochastic processes, Markov chains and error probabilities. The p ...

2005

Validation of Tissue Modelization and Classification Techniques in T1-weighted MR Brain Images

Jean-Philippe Thiran, Meritxell Bach Cuadra, Leila Cammoun, Olivier Cuisenaire, Torsten Butz

We propose a deep study on tissue modelization and classification techniques on T1-weighted MR images. Six approaches have been taken into account to perform this validation study. We consider first the Finite Gaussian Mixture model (A-FGMM) and a Bayes cl ...

2004

The signal processing community is increasingly interested in using information theoretic concepts to build signal processing algorithms for a variety of applications. A general theory on how to apply the mathematical concepts of information theory to the ...

EPFL2003

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Intra-operative MR imaging is an emerging tool for image guided (neuro)surgery. Due to the small size of the magnets and the short acquisition time, the images produced by such devices are often subject to distortions. In this work, we show the particular ...

SPIE2003

Neuronavigation systems are usually subject to inaccuracy due to intraoperative changes like brain shift or tumor resection. In order to correct for these deformations a biomechanical model of the brain is proposed. Not only elastic tissues, but also fluid ...

EPFL2003

MIP: The ITS-EPFL Medical Image Processing Library

Jean-Philippe Thiran, Meritxell Bach Cuadra, Olivier Cuisenaire, Torsten Butz

This document presents a brief description of the Medical Image Processing (MIP) library developed by the Brain Group of the Signal Processing Institute (ITS) at Swiss Federal Institute of Technology (EPFL). This library is a result of more than three year ...

2002

Validation of Tissue Modelization and Classification Techniques in T1-Weighted MR Brain Images

Jean-Philippe Thiran, Meritxell Bach Cuadra, Torsten Butz, Bram Platel

We propose a deep study on tissue modelization and classification Techniques on T1-weighted MR images. Three approaches have been taken into account to perform this validation study. Two of them are based on Finite Gaussian Mixture (FGM) model. The first o ...

EUSIPCO2002