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An Ad Hoc Information Retrieval Perspective on PLSI through language model identification

Publications associées (42)

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Online statistical estimation for vehicle control

Christos Dimitrakakis

This tutorial examines simple physical models of vehicle dynamics and overviews methods for parameter estimation and control. Firstly, techniques for the estimation of parameters that deal with constraints are detailed. Secondly, methods for controlling th ...

IDIAP2006

Finding groups of people in Google news

Daniel Gatica-Perez

In this paper, we study the problem of content-based social network discovery among people who frequently appear in world news. Google news is used as the source of data. We describe a probabilistic framework for associating people with groups. A low-dimen ...

2006

A Discriminative Approach for the Retrieval of Images from Text Queries

Samy Bengio, David Grangier, Florent Monay Michaud

This work proposes a new approach to the retrieval of images from text queries. Contrasting with previous work, this method relies on a discriminative approach: the parameters are selected in order to minimize a loss related to the ranking performance of t ...

IDIAP2006

Modeling Interactions from Email Communication

Daniel Gatica-Perez, Samy Bengio, Dong Zhang

Email plays an important role as a medium for the spread of information, ideas, and influence among its users. We present a framework to learn topic-based interactions between pairs of email users, i.e., the extent to which the email topic dynamics of one ...

2006

Modeling semantic aspects for cross-media image indexing

Daniel Gatica-Perez, Florent Monay Michaud

To go beyond the query-by-example paradigm in image retrieval, there is a need for semantic indexing of large image collections for intuitive text-based image search. Different models have been proposed to learn the dependencies between the visual content ...

IDIAP2005

Finding groups of people in Google news

Daniel Gatica-Perez

IDIAP2005

Modeling Interactions from Email Communication

Daniel Gatica-Perez, Samy Bengio, Dong Zhang

IDIAP2005

PLSA-based Image Auto-Annotation: Constraining the Latent Space

Daniel Gatica-Perez, Florent Monay Michaud

We address the problem of unsupervised image auto-annotation with probabilistic latent space models. Unlike most previous works, which build latent space representations assuming equal relevance for the text and visual modalities, we propose a new way of m ...

2004

PLSA-based Image Auto-Annotation: Constraining the Latent Space

Daniel Gatica-Perez, Florent Monay Michaud

IDIAP2004

Offline Cursive Handwriting: From Word To Text Recognition

Alessandro Vinciarelli

This thesis presents a PhD work on offline cursive handwriting recognition, the automatic transcription of cursive data when only its image is available. Two main approaches were used in the literature to solve the problem. The first one attempts to segmen ...

IDIAP2003