Catégorie

Surveillance

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Selected topics on distributed video coding

Mourad Ouaret

Distributed Video Coding (DVC) is a new paradigm for video compression based on the information theoretical results of Slepian and Wolf (SW), and Wyner and Ziv (WZ). While conventional coding has a rigid complexity allocation as most of the complex tasks a ...

EPFL2008

Illuminant retrieval for fixed location cameras

Sabine Süsstrunk, Joanna Marguier

Fixed location cameras, such as panoramic cameras or surveillance cameras, are very common. In images taken with these cameras, there will be changes in lighting and dynamic image content, but there will also be constant objects in the background. We propo ...

2008

Multiscale video applied to surveillance and video conferencing systems

David Leroux

In the following study is presented two research works: the first is concerned with the elaboration of an intelligent meeting room while the second is about the development of a real time high definition video server capable of advanced accessibility optio ...

EPFL2008

Multi-camera 3d person tracking with particle filter in a surveillance environment

Jean-Marc Odobez

In this work we present and evaluate a novel 3D approach to track single people in surveillance scenarios, using multiple cameras. The problem is formulated in a Bayesian filtering framework, and solved through sampling approximations (i.e. using a particl ...

2008

Plasma: A Scripting Language for Processing Media Streams

Bing Liu

Media streaming has found applications in many domains such as education, entertainment, communication and video surveillance. Many of these applications require non-trivial manipulations of media streams, beyond the usual capture/playback operations suppo ...

SPIE2007

Detecting Abandoned Luggage Items in a Public Space

Daniel Gatica-Perez, Kevin Smith, Pedro Manuel Da Silva Quelhas

Visual surveillance is an important computer vision research problem. As more and more surveillance cameras appear around us, the demand for automatic methods for video analysis is increasing. Such methods have broad applications including surveillance for ...

2006

Detecting Abandoned Luggage Items in a Public Space

Daniel Gatica-Perez, Kevin Smith, Pedro Manuel Da Silva Quelhas

IDIAP2006

Fusion-based Multiview Distributed Video Coding

Touradj Ebrahimi, Frédéric Dufaux, Mourad Ouaret

In this paper, we introduce a scheme for coding video surveillance camera networks. It is based on multiview and Distributed Video Coding (DVC). DVC is known for its low complexity encoders. This makes it very interesting for a wide range of applications, ...

IEEE2006

Scrambling for Video Surveillance with Privacy

Touradj Ebrahimi

In this paper, we address the problem of scrambling regions of interest in a video sequence for the purpose of preserving privacy in video surveillance. We propose an efficient solution based on transform-domain scrambling. More specifically, the sign of s ...

IEEE2006

Application Dependent Video Segmentation Evaluation - A Case Study for Video Surveillance

Touradj Ebrahimi, Elisa Drelie Gelasca

Evaluation of the performance of video segmentation algorithms is important in both theoretical and practical considerations. This paper addresses the problem of video segmentation assessment, through both subjective and objective approaches, for the speci ...

2006