Recherche

Afficher tous les résultats pour

Accueil

Personne

Touradj Ebrahimi

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (306)

Error Resiliency of Distributed Video Coding in Wireless Video Communication

Touradj Ebrahimi, Mourad Ouaret, Frédéric Dufaux, Michael Ansorge

Distributed Video Coding (DVC) is a new paradigm in video coding, based on the Slepian-Wolf and Wyner-Ziv theorems. DVC offers a number of potential advantages: flexible partitioning of the complexity between the encoder and decoder, robustness to channel ...

SPIE2008

Face Detection Using Discrete Gabor Jets And Color Information

Touradj Ebrahimi, Ulrich Hoffmann, Ashkan Yazdani

Face detection allows to recognize and detect human faces and provides information about their location in a given image. Many applications such as biometrics, face recognition, and video surveillance employ face detection as one of their main modules. The ...

2008

Hybrid Spatial and Temporal Error Concealment for Distributed Video Coding

Touradj Ebrahimi, Mourad Ouaret, 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

Distributed Video Coding: Selecting the most promising application scenarios

Touradj Ebrahimi

Distributed Video Coding (DVC) is a new video coding paradigm based on two major Information Theory results: the Splepian-Wolf and Wyner-Ziv theorems. Recently, practical DVC solutions have been proposed with promising results; however, there is still a ne ...

2008

Improved Side Information Generation with Iterative Decoding and Frame Interpolation for Distributed Video Coding

Touradj Ebrahimi, Mourad Ouaret, 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 ...

2008

Overview of JPSearch: a Standard for Image Search and Retrieval

Touradj Ebrahimi, Frédéric Dufaux, Michael Ansorge

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

Orientation histogram-based matching for Region Tracking

Touradj Ebrahimi

A region tracking technique with particular emphasis on rotation robustness is presented. It is based on region matching divided in two consecutive steps, gradient orientation histogram matching and template matching through Normalised Cross Correlation (N ...

2007

Combination of video-based camera trackers using a dynamically adapted particle filter

Touradj Ebrahimi

This paper presents a video-based camera tracker that combines marker-based and feature point-based cues in a particle filter framework. The framework relies on their complementary performance. Marker-based trackers can robustly recover camera position and ...

2007

Distributed Monoview and Multiview Video Coding

Touradj Ebrahimi

2007

Multiview Distributed Video Coding with Encoder Driven Fusion

Touradj Ebrahimi, Mourad Ouaret, 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

Studying Error Resilience Performance for a Feedback Channel Based Transform Domain Wyner-Ziv Video Codec

Touradj Ebrahimi, Frédéric Dufaux

Wyner-Ziv (WZ) video coding is an emerging video coding paradigm based on two major Information Theory results: the Slepian-Wolf and Wyner-Ziv theorems. One of the most interesting and used WZ video coding architectures makes use of a feedback channel (FC) ...

2007

Watermarked 3D Mesh Quality Assessment

Touradj Ebrahimi, Elisa Drelie Gelasca

This paper addresses the problem of assessing distortions produced by watermarking 3D meshes. In particular, a new methodology for subjective evaluation of the quality of 3D objects is proposed and implemented. Two objective metrics derived from measures o ...

2007

Efficient rotation-discriminative template matching

Touradj Ebrahimi

This paper presents an efficient approach to rotation discriminative template matching. A hierarchical search divided in three steps is proposed. First, gradient magnitude is compared to rapidly localise points with high probability of match. This result i ...

Springer-Verlag2007

Recent Advances in Multi-view Distributed Video Coding

Touradj Ebrahimi, Mourad Ouaret, Frédéric Dufaux

We consider dense networks of surveillance cameras capturing overlapped images of the same scene from different viewing directions, such a scenario being referred to as multi-view. Data compression is paramount in such a system due to the large amount of c ...

2007

On Comparing Image and Video Compression Algorithms

Touradj Ebrahimi, Mourad Ouaret, Frédéric Dufaux

In this work, a performance evaluation of AVC Intra and JPEG2000 in terms of rate-distortion performance is conducted. A set of High Definition sequences with different spatial resolutions is used for this purpose. Results obtained show quite competitive p ...

2007

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

Touradj Ebrahimi, Mourad Ouaret, 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

Particle filter-based camera tracker fusing marker- and feature point-based cues

Touradj Ebrahimi, Yousri Abdeljaoued, Yannick Maret

This paper presents a video-based camera tracker that combines marker-based and feature point-based cues in a particle filter framework. The framework relies on their complementary performances. Marker-based trackers can robustly recover camera position an ...

2007

Codec-Independent Scalable Distributed Video Coding

Touradj Ebrahimi, Mourad Ouaret, 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

Perceptually driven 3D distance metrics with application to watermarking

Touradj Ebrahimi

2006

Adaptive Image Replica Detection based on Support Vector Classifiers

Touradj Ebrahimi, Yannick Maret, Frédéric Dufaux

In this paper, we present a system for image replica detection. The technique is based on the extraction of 162 features corresponding to texture, colour and grey-level characteristics. These features are then weighted and statistically normalized. To impr ...

2006

Page 15 sur 16