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Publications associées (98)

Tracking People in Meetings with Particles

Daniel Gatica-Perez, Jean-Marc Odobez, Guillaume Lathoud, Silèye Oumar Ba, Kevin Smith

Automatic meeting analysis is an emerging research field. In this paper, we present stochastic algorithms for tracking people in multi-sensor meeting rooms, for a number of relevant tasks, including tracking multiple people, tracking head pose towards anal ...

2005

Sparse Approximation by Linear Programming using an L1 Data-Fidelity Term

Pierre Vandergheynst, Lorenzo Granai

This paper studies the problem of sparse signal approximation over redundant dictionaries. Our attention is focused on the minimization of a cost function where the error is measured by using the L1 norm, giving thus less importance to outliers. We show a ...

IEEE2005

Sparse Approximation by Linear Programming: Measuring the Error with the $ell_1$ Norm

Pierre Vandergheynst, Lorenzo Granai

In this report we study the problem of sparse signal approximation over redundant dictionaries. We focus our attention on the minimization of a cost function where the error is measured using a l1 norm. We show a constructive equivalence between this minim ...

2005

Spreadsheet Framework for Visual Exploration of Biomedical Datasets

Daniel Thalmann, Ronan Boulic, Sofiane Sarni, Anderson Maciel

In this paper, we present our spreadsheet framework, which uses a spreadsheet-likeinterface for exploring biomedical datasets. The principles and advantages of this classof visualization systems are illustrated, and a case study for the analysis of hip joi ...

2005

Comparing Distributed Cognition and Course of Action: An application to car driving

Distributed Cognition and Course of Action theories offer frameworks for micro-analysis of activity. The former leads to an abstract level of description of the propagation of information in a socio-technical system. The latter embeds conclusions from the ...

2005

Dot trajectories in the superposition of random screens: Analysis and synthesis

Isaac Amidror

Moire effects that occur in the superposition of aperiodic layers such as correlated random dot screens are known as Glass patterns. One of the most interesting properties of such moire effects, which clearly distinguish them from their periodic counterpar ...

Optical Society of America, Washington, United States2004

Tracking People in Meetings with Particles

Daniel Gatica-Perez, Jean-Marc Odobez, Guillaume Lathoud, Silèye Oumar Ba, Kevin Smith

IDIAP2004

Implementing a State Space Analyzer for Synchronous Java

Claude Petitpierre

In this paper we present a toolset aimed at the analysis of programs written in Java and a new kind of active objects. The toolset detects if the program contains deadlocks and may provide a CCS description along with a labeled transition system of the pro ...

2004

Teaching Image-Processing Programming in Java

Michaël Unser, Daniel Sage

Image processing (IP) can be taught very effectively by complementing the basic lectures with computer laboratories where the participants can actively manipulate and process images. This offering can be made even more attractive by allowing the students t ...

IEEE2003

The "Liquid Computer": A Novel Strategy for Real-Time Computing on Time Series

Henry Markram

We will discuss in this survey article a new framework for analysing computations on time series and in particular on spike trains, introduced in (Maass et. al. 2002). In contrast to common computational models this new framework does not require that info ...

2002

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