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Frédéric Dufaux

Cette personne a quitté l’EPFL

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Publications associées (36)

Page 2 sur 2

Toward a secure JPEG

Touradj Ebrahimi, Frédéric Dufaux

In this paper, we propose a Secure JPEG, an open and flexible standardized framework to secure JPEG images. Its goal is to allow the efficient integration and use of security tools enabling a variety of security services such as confidentiality, integrity ...

2006

Performance evaluation of two state of the art DVC codecs

Touradj Ebrahimi, Frédéric Dufaux

The performance of existing DVC codecs is still lacking relative to that of H.264 and work is being carried out in order to close this gap. The authors of this paper have been and still are involved in the development of two DVC codecs respectively, the pe ...

2009

A subjective study of the influence of color information on visual quality assessment of high resolution pictures

Touradj Ebrahimi, Frédéric Dufaux, Francesca De Simone

This paper presents the design and the results of a psychovisual experiment which aims at understanding how the color information affects the perceived quality of a high resolution still picture. The results of this experiment help to shed light into the i ...

2009

Iterative Multiview Side Information for Enhanced Reconstruction in Distributed Video Coding

Touradj Ebrahimi, Frédéric Dufaux

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). DVC entails low complexity encoders as well as separate encoding of correlated video source ...

2009

Codec-Independent Scalable Distributed Video Coding

Touradj Ebrahimi, Frédéric Dufaux

In this paper, we introduce novel schemes for scalable Distributed Video Coding (DVC), dealing with temporal, spatial and quality scalabilities. More specifically, conventional coding is used to obtain a base layer. DVC is then applied to generate enhancem ...

2007

Improved Side Information Generation for Distributed Video Coding by Exploiting Spatial and Temporal Correlations

Touradj Ebrahimi, Frédéric Dufaux

Distributed Video Coding (DVC) is a new paradigm in video coding, which is receiving a lot of interests nowadays. Side Information (SI) generation is a key function in the DVC decoder, and plays a key-role in determining the performance of the codec. This ...

2009

Towards Generic Detection of Unusual Events in Video Surveillance

Touradj Ebrahimi, Frédéric Dufaux, Ivan Ivanov

In this paper, we consider the challenging problem of unusual event detection in video surveillance systems. The proposed approach makes a step toward generic and automatic detection of unusual events in terms of velocity and acceleration. At first, the mo ...

2009

Multiview Distributed Video Coding with Encoder Driven Fusion

Touradj Ebrahimi, Frédéric Dufaux

In this paper, a scheme based on multiview and Distributed Video Coding (DVC) is introduced. More specifically, a new fusion technique between temporal, homography and Disparity Compensation View Prediction (DCVP) side informations is introduced. For this ...

2007

A comparative study of color image compression standards using perceptually driven quality metrics

Touradj Ebrahimi, Frédéric Dufaux, Francesca De Simone

The task of comparing the performance of different codecs is strictly related to the research in the field of objective quality metrics. Even if several objective quality metrics have been proposed in literature, the lack of standardization in the field of ...

SPIE2008

Hybrid Spatial and Temporal Error Concealment for Distributed Video Coding

Touradj Ebrahimi, Frédéric Dufaux

Distributed Video Coding (DVC) is based on a new paradigm in coding, which has received many interests recently. Among other features, DVC is said to provide better error resiliency. This paper proposes a hybrid spatial and temporal error concealment schem ...

2008

Encoder and Decoder Side Global and Local Motion Estimation for Distributed Video Coding

Touradj Ebrahimi, Frédéric Dufaux

In this paper, we propose a new Distributed Video Coding (DVC) architecture where motion estimation is performed both at the encoder and decoder, effectively combining global and local motion models. We show that the proposed approach improves significantl ...

2010

3D video technologies and services

Touradj Ebrahimi, Frédéric Dufaux

Springer France2013

The VISNET II DVC codec: architecture, tools and performance

Touradj Ebrahimi, Frédéric Dufaux

This paper introduces the VISNET II DVC codec. This co-dec achieves very high RD performance thanks to the efficient combination of many state-of-the-art coding tools into a fully practical video codec. Experimental results show that the proposed DVC codec ...

2010

A comparative study of JPEG 2000, AVC/H.264, and HD Photo

Touradj Ebrahimi, Frédéric Dufaux, Francesca De Simone

In this paper, we report a study evaluating rate-distortion performance between JPEG 2000, AVC/H.264 High 4:4:4 Intra and HD Photo. A set of ten high definition color images with different spatial resolutions has been used. Both the PSNR and the perceptual ...

2007

Overview of JPSearch: a Standard for Image Search and Retrieval

Touradj Ebrahimi, Frédéric Dufaux

In this paper, we review the on-going JPSearch standardization activity. Its goal is to provide a standard for interoperability for image search and retrieval systems. More specifically, JPSearch aims at defining the interfaces and protocols for data excha ...

2007

Smart video surveillance system preserving privacy

Touradj Ebrahimi, Frédéric Dufaux

In this paper, we present a smart video surveillance system based on standard technologies and wired or wireless IP networking. The key novelty of the system is that it protects the privacy of people under surveillance. More specifically, a video analysis ...

2005