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Jean-Marc Odobez

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Publications associées (77)

Recognizing the Visual Focus of Attention for Human Robot Interaction

Jean-Marc Odobez, Samira Sheikhi

We address the recognition of people’s visual focus of attention (VFOA), the discrete version of gaze that indicates who is looking at whom or what. As a good indicator of addressee-hood (who speaks to whom, and in particular is a person speaking to the ro ...

Springer Berlin Heidelberg2012

Assessing Sparse Coding Methods for Contextual Shape Indexing of Maya Hieroglyphs

Jean-Marc Odobez, Daniel Gatica-Perez, Edgar Roman Rangel

Bag-of-visual-words or bag-of-visterms (bov) is a common technique used to index Multimedia information with the purposes of retrieval and classification. In this work we address the problem of constructing efficient bov representations of complex shapes a ...

2012

A Bimodal Sound Source Model for Vehicle Tracking in Traffic Monitoring

Xavier Falourd, Hervé Lissek, Jean-Marc Odobez, Patrick Marmaroli

The paper addresses road traffic monitoring using a compact microphone array. More precisely, estimation of both speed and wheelbase distance of detected vehicles is performed. The detection algorithm is based on the comparison between theoretical and meas ...

2011

3D human pose recovery from image by efficient visual feature selection

Jean-Marc Odobez, Cheng Chen

2011

Fast human detection from joint appearance and foreground feature subset covariances

Jean-Marc Odobez

We present a fast method to detect humans from stationary surveillance videos. It is based on a cascade of LogitBoost classifiers which use covariance matrices as object descriptors. We have made several contributions. First, our method learns the correlat ...

2011

Analyzing ancient Maya glyph collections with Contextual Shape Descriptors

Jean-Marc Odobez, Daniel Gatica-Perez, Edgar Roman Rangel

This paper presents an original approach for shape-based analysis of ancient Maya hieroglyphs based on an interdisciplinary collaboration between computer vision and archaeology. Our work is guided by realistic needs of archaeologists and scholars who crit ...

Springer US2011

Multiperson Visual Focus of Attention from Head Pose and Meeting Contextual Cues

Jean-Marc Odobez, Silèye Oumar Ba

2011

Contextual classification of image patches with latent aspect models

Florent Monay Michaud, Jean-Marc Odobez, Pedro Manuel Da Silva Quelhas, Daniel Gatica-Perez

We present a novel approach for contextual classification of image patches in complex visual scenes, based on the use of histograms of quantized features and probabilistic aspect models. Our approach uses context in two ways: (1) by using the fact that spe ...

2009

Recognizing Human Visual Focus of Attention from Head Pose in Meetings

Jean-Marc Odobez, Silèye Oumar Ba

We address the problem of recognizing the visual focus of attention (VFOA) of meeting participants based on their head pose. To this end, the head pose observations are modeled using a Gaussian Mixture Model (GMM) or a Hidden Markov Model (HMM) whose hidde ...

2009

Tracking the visual focus of attention for a varying number of wandering people

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

In this article, we define and address the problem of finding the visual focus of attention for a varying number of wandering people (VFOA-W) -- determining where a person is looking when their movement is unconstrained. VFOA-W estimation is a new and impo ...

2008

Short-Term Spatio-Temporal Clustering Applied to Multiple Moving Speakers

Guillaume Lathoud, Jean-Marc Odobez

Distant microphones permit to process spontaneous multi-party speech with very little constraints on speakers, as opposed to close-talking microphones. Minimizing the constraints on speakers permits a large diversity of applications, including meeting summ ...

2007

A Thousand Words in a Scene

Jean-Marc Odobez, Pedro Manuel Da Silva Quelhas, Daniel Gatica-Perez

This paper presents a novel approach for visual scene modeling and classification, investigating the combined use of text modeling methods and local invariant features. Our work attempts to elucidate (1) whether a text-like \emph{bag-of-visterms} represent ...

2007

Audio-visual probabilistic tracking of multiple speakers in meetings

Guillaume Lathoud, Jean-Marc Odobez, Daniel Gatica-Perez

Tracking speakers in multiparty conversations constitutes a fundamental task for automatic meeting analysis. In this paper, we present a probabilistic approach to jointly track the location and speaking activity of multiple speakers in a multisensor meetin ...

2006

Embedding Motion in Model-Based Stochastic Tracking

Jean-Marc Odobez, Silèye Oumar Ba, Daniel Gatica-Perez

Particle filtering (PF) is now established as one of the most popular methods for visual tracking. Within this framework, two assumptions are generally made. The first is that the data are temporally independent given the sequence of object states, and the ...

2006

Application of Information Retrieval Technologies to Presentation Slides

Alessandro Vinciarelli, Jean-Marc Odobez

Presentations are becoming an increasingly more common means of communication in working environments, and slides are often the necessary supporting material on which the presentations rely. In this paper, we describe a slide indexing and retrieval system ...

2006

Video Text Recognition using Sequential Monte Carlo and Error Voting Methods

Datong Chen, Jean-Marc Odobez

This paper addresses the issue of segmentation and recognition of text embedded in video sequences from their associated text image sequence extracted by a text detection module. To this end, we propose a probabilistic algorithm based on Bayesian adaptive ...

2005

Monte Carlo Video Text Segmentation

Jean-Philippe Thiran, Datong Chen, Jean-Marc Odobez

This paper presents a probabilistic algorithm for segmenting and recognizing text embedded in video sequences based on adaptive thresholding using a Bayes filtering method. The algorithm approximates the posterior distribution of segmentation thresholds of ...

2005

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