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Publications associées (306)

Context-dependent JPEG backward-compatible high-dynamic range image compression

Touradj Ebrahimi

High Dynamic Range (HDR) imaging is expected, together with ultra-high definition (UHD) and high frame rate (HFR) video, to become a technology that may change photo, TV, and film industries. Many cameras and displays capable of capturing and rendering bot ...

2013

Objective quality metrics for video scalability

Touradj Ebrahimi, Francesca De Simone, Adrien Georges Jean Besson

Scalable video coding is emerging as an efficient alternative to simulcast encoding to distribute the same video content si- multaneously to many users having different terminals and network conditions. In order to select the best combination of video scal ...

2013

Paired comparison-based subjective quality assessment of stereoscopic images

Touradj Ebrahimi, Jong Seok Lee, Lutz Goldmann

As 3D image and video content has gained significant popularity, subjective 3D quality assessment has become an important issue for the creation, processing, and distribution of high quality 3D content. Reliable subjective quality assessment of 3D content ...

Springer Verlag2013

Benchmarking of quality metrics on ultra-high definition video sequences

Touradj Ebrahimi, Philippe Hanhart

The performance of objective quality metrics for high-definition (HD) video sequences is well studied, but little is known about their performance for ultra-high definition (UHD) video sequences. This paper analyzes the performance of several common object ...

2013

3D video technologies and services

Touradj Ebrahimi, Frédéric Dufaux

Springer France2013

A quality assessment protocol for Free-viewpoint video sequences synthesized from decompressed depth data

Touradj Ebrahimi, Philippe Hanhart

In this paper, the analysis of a subjective quality experiment consisting in assessing the quality of free-viewpoint video sequences generated from decompressed depth data is presented. In the absence of a dedicated subjective assessment protocol for the e ...

2013

MediaEval 2013 Visual Privacy Task: Warping-based Privacy Protection Tool

Touradj Ebrahimi

In this paper, we describe EPFL privacy protection tool submitted to the MediaEval 2013 Visual Privacy task. The goal of the task is to obscure faces and other personal items of people in the provided surveillance clips to preserve their personal privacy. ...

2013

High Dynamic Range Imaging

Touradj Ebrahimi

Spie-Soc Photo-Optical Instrumentation Engineers2013

Networked digital media FOREWORD

Touradj Ebrahimi

Springer France2013

Quality Assessment of a Stereo Pair Formed From Decoded and Synthesized Views Using Objective Metrics

Touradj Ebrahimi, Philippe Hanhart

When a stereo pair is formed from a decoded view and a synthesized view, it is unclear how the overall quality of the stereo pair should be assessed through objective quality metrics. In this paper, this problem is addressed considering a 3D video represen ...

2012

Electroencephalogram Alterations During Perception of Pleasant and Unpleasant Odors

Touradj Ebrahimi, Jean-Marc Vesin, Ashkan Yazdani, Eleni Kroupi

2012

In Tags We Trust: Trust modeling in social tagging of multimedia content

Touradj Ebrahimi, Ivan Ivanov, Péter Vajda, Jong Seok Lee

Tagging in online social networks is very popular these days, as it facilitates search and retrieval of multimedia content. However, noisy and spam annotations often make it difficult to perform an efficient search. Users may make mistakes in tagging and i ...

2012

Comparison of 3D portable display restitution techniques based on stereo and motion parallax

Touradj Ebrahimi, Martin Rerabek

Currently, the large majority of 3D display solutions rely on binocular perception phenomena. Furthermore, while 3D display technologies are already widely available for cinema and home or corporate use, only a few portable devices currently feature 3D dis ...

2012

Evaluation of Visual privacy Filters Impact on Video Surveillance Intelligibility

Touradj Ebrahimi, Francesca De Simone

Since privacy issues are becoming important with growth of the video surveillance, many tools are proposed for protection of personal privacy in the video. However, little is understood regarding the effectiveness of such tools and their effect on the unde ...

2012

A JPEG backward-compatible HDR image compression

Touradj Ebrahimi

High Dynamic Range (HDR) imaging is expected to become one of the technologies that could shape next generation of consumer digital photography. Manufacturers are rolling out cameras and displays capable of capturing and rendering HDR images. The popularit ...

Spie-Int Soc Optical Engineering2012

Assessment of Stereoscopic Crosstalk Perception

Touradj Ebrahimi

Stereoscopic three-dimensional (3-D) services do not always prevail when compared with their two-dimensional (2-D) counterparts, though the former can provide more immersive experience with the help of binocular depth. Various specific 3-D artefacts might ...

2012

Quality of multimedia experience

Touradj Ebrahimi

2012

Geotag Propagation in Social Networks Based on User Trust Model

Touradj Ebrahimi, Ivan Ivanov, Péter Vajda, Jong Seok Lee, Lutz Goldmann

In the past few years sharing photos within social networks has become very popular. In order to make these huge collections easier to explore, images are usually tagged with representative keywords such as persons, events, objects, and locations. In order ...

Springer2012

Towards a Descriptive Depth Index for 3D Content: Measuring Perspective Depth Cues

Touradj Ebrahimi, Lutz Goldmann

2012

MediaEval 2012 Visual Privacy Task: Applying Transform-domain Scrambling to Automatically Detected Faces

Touradj Ebrahimi, Aleksei Triastcyn

In this paper, we describe our approach and discuss evaluation results for the MediaEval 2012 Visual Privacy task. The goal of the task is to obscure faces of people visible in provided surveillance clips to preserve their personal privacy. We also additio ...

2012

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