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Advances in top-down and bottom-up approaches to video-based camera tracking

Publications associées (147)

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Multi-Person Tracking in Meetings: A Comparative Study

Daniel Gatica-Perez, Kevin Smith

In this paper, we present the findings of the Augmented Multiparty Interaction (AMI) project investigation on the localization and tracking of 2D head positions in meetings. The focus of the study was to test and evaluate various multi-person tracking meth ...

2006

Multi-Person Tracking in Meetings: A Comparative Study

Daniel Gatica-Perez, Kevin Smith

IDIAP2006

An all-in-one solution to geometric and photometric calibration

Pascal Fua, Vincent Lepetit, Julien Pilet, Pascal Lagger, Andreas Geiger

We propose a fully automated approach to calibrating multiple cameras whose fields of view may not all overlap. Our technique only requires waving an arbitrary textured planar pattern in front of the cameras, which is the only manual intervention that is r ...

2006

Getting Real with Ubiquitous Computing: the Impact of Discrepancies on Collaboration

Nicolas Nova

Ubiquitous computing is still a maturing field of investigation. The vision of the seamless integration of computers to people’s life has yet to happen, if it ever has to become a reality. Nowadays, most mobile, distributed systems and sensor technologies ...

2006

Robust Feature Point Extraction and Tracking for Augmented Reality

Touradj Ebrahimi

For augmented reality applications, accurate estimation of the camera pose is required. An existing video-based markerless tracking system, developed at the ITS, presents several weaknesses towards this goal. In order to improve the video tracker, several ...

2005

Hybrid Tracking for Augmented Reality

Touradj Ebrahimi

Accurate registration between real and virtual objects is critical for Augmented Reality (AR) applications. State of the art shows that no tracking device is individually adequate. We present a data fusion framework that combines orientation measurements o ...

2005

Tracking and User Interface for Mixed Reality

Touradj Ebrahimi, Yousri Abdeljaoued

This chapter introduces the field of Mixed Reality that merges the real and virtual worlds seamlessly. To develop a Mixed Reality system, two fundamental problems should be addressed: tracking and user interface. Tracking in Mixed Reality is defined as the ...

John Wiley and Sons Ltd2005

Online Registration Tool and Markerless Tracking for Augmented Reality

Touradj Ebrahimi, Yousri Abdeljaoued

This paper presents a markerless tracking algorithm for augmented reality with no constraints in the geometry of the scene. Users pose is estimated using natural feature point extraction and tracking, and the epipolar geometry constraint between camera vi ...

2005

Browsing the environment with the SNAP&TELL wearable computer system

Ali H. Sayed

This paper provides an overview of a multi-modal wearable computer system, SNAP&TELL. The system performs real-time gesture tracking, combined with audio-based control commands, in order to recognize objects in an environment, including outdoor landmarks. ...

Springer-Verlag2005

Tracking Video Objects in Cluttered Background

Touradj Ebrahimi

We present an algorithm for tracking video object which is based on an hybrid strategy. This strategy uses both object and region information to solve the correspondence problem. Low level descriptors are exploited to track objects regions and to cope wit ...

2005