Publications de Martin Rerabek

ICtCp Versus Y'CbCr

Touradj Ebrahimi, Martin Rerabek, Anne-Flore Nicole Marie Perrin

2018

Evaluation of ICtCp color space and an Adaptive Reshaper for HDR and WCG

Touradj Ebrahimi, Martin Rerabek, Anne-Flore Nicole Marie Perrin

New emerging technologies in the field of multimedia, such as high dynamic range and wide color gamut, challenge the performance of existing image and video data processing algorithms, especially in terms of visual data compression and its faithful represe ...

2018

Quality assessment of an HDR dual-layer backward-compatible codec compared to uncompromised SDR and HDR solutions

Touradj Ebrahimi, Martin Rerabek, Anne-Flore Nicole Marie Perrin

Broadcasting high dynamic range (HDR) video has been demonstrated as largely preferred when compared to standard dynamic range (SDR), mainly due to its capability of representing more details in dark and bright regions. Additionally, progress over the last ...

2018

Impact of interactivity on the assessment of quality of experience for light field content

Touradj Ebrahimi, Martin Rerabek, Irene Viola

The recent advances in light field imaging are changing the way in which visual content is captured, processed and consumed. Storage and delivery systems for light field images rely on efficient compression algorithms. Such algorithms must additionally tak ...

2017

Comparison and evaluation of light field image coding approaches

Touradj Ebrahimi, Martin Rerabek, Irene Viola

The recent advances in light field imaging, supported among others by the introduction of commercially available cameras e.g. Lytro or Raytrix, are changing the ways in which visual content is captured and processed. Efficient storage and delivery systems ...

Ieee-Inst Electrical Electronics Engineers Inc2017

On the performance of objective metrics for omnidirectional visual content

Touradj Ebrahimi, Martin Rerabek, Evgeniy Upenik

Omnidirectional image and video have gained popularity thanks to availability of capture and display devices for this type of content. Recent studies have assessed performance of objective metrics in predicting visual quality of omnidirectional content. Th ...

IEEE2017

Modeling Immersive Media Experiences by Sensing Impact on Subjects

Touradj Ebrahimi, Philippe Hanhart, Jong Seok Lee, Eleni Kroupi, Martin Rerabek

As immersive technologies target to provide higher quality of multimedia experiences, it is important to understand the quality of experience (QoE) perceived by users from various multimedia rendering schemes, in order to design and optimize human-centric ...

Springer Verlag2016

Testbed for subjective evaluation of omnidirectional visual content

Touradj Ebrahimi, Martin Rerabek, Evgeniy Upenik

Omnidirectional visual content is a form of representing graphical and cinematic media content which provides subjects with the ability to freely change the direction of view. Along with virtual reality, omnidirectional imaging is becoming a very important ...

IEEE2016

New Light Field Image Dataset

Touradj Ebrahimi, Martin Rerabek

Recently, an emerging light field imaging technology, which enables capturing full light information in a scene, has gained a lot of interest. To design, develop, implement, and test novel algorithms in light field image processing and compression, the ava ...

2016

Objective and subjective evaluation of light field image compression algorithms

Touradj Ebrahimi, Martin Rerabek, Irene Viola

This paper reports results of subjective and objective quality assessments of responses to a grand challenge on light field image compression. The goal of the challenge was to collect and evaluate new compression algorithms for light field images. In total ...

2016

Subjective and Objective Evaluation of HDR Video Coding Technologies

Touradj Ebrahimi, Philippe Hanhart, Martin Rerabek

This paper reports the details and results of a subjective and objective quality evaluation assessing responses to an MPEG call for evidence (CfE) on high dynamic range (HDR) and wide color gamut video coding. Five HDR video contents, compressed at four bi ...

Ieee2016

Quality Evaluation of HEVC and VP9 Video Compression in Real-Time Applications

Touradj Ebrahimi, Philippe Hanhart, Martin Rerabek

Video consumption over Internet has increased significantly over the recent years and occupies the majority of the overall data traffic. To decrease the load on the Internet infrastructure and reduce bandwidth taken by video, higher efficiency video codecs ...

2015

Multimodal Dataset for Assessment of Quality of Experience in Immersive Multimedia

Touradj Ebrahimi, Eleni Kroupi, Martin Rerabek, He Xu, Anne-Flore Nicole Marie Perrin

This paper presents a novel multimodal dataset for the analysis of Quality of Experience (QoE) in emerging immersive multimedia technologies. In particular, the perceived Sense of Presence (SoP) induced by one-minute long video stimuli is explored with res ...

2015

Subjective and objective evaluation of HDR video compression

Touradj Ebrahimi, Philippe Hanhart, Martin Rerabek

Recent efforts by MPEG and research community to standardize high dynamic range (HDR) video compression require efficient objective metrics. This paper investigates how well the currently available metrics measure perceptual quality of HDR video. For this ...

2015

User-independent classification of 2D versus 3D multimedia experiences through EEG and physiological signals

Touradj Ebrahimi, Philippe Hanhart, Jong Seok Lee, Eleni Kroupi, Martin Rerabek

3D image and video have become popular since they can enhance the Quality of Experience (QoE) by adding the depth dimension to the traditional 2D media. In order to design and optimize the human-centric 3D multimedia processing techniques, it is important ...

2014

Subjective evaluation of an active crosstalk reduction system for mobile autostereoscopic displays

Touradj Ebrahimi, Philippe Hanhart, Alexandre Chappuis, Martin Rerabek

The Quality of Experience (QoE) provided by autostereoscopic 3D displays strongly depends on the user position. For an optimal image quality, the observer should be located at one of the relevant positions, called sweet spots, where artifacts reducing the ...

Spie-Int Soc Optical Engineering2014

Predicting Subjective Sensation of Reality During Multimedia Consumption Based on EEG and Peripheral Physiological Signals

Touradj Ebrahimi, Philippe Hanhart, Jong Seok Lee, Eleni Kroupi, Martin Rerabek

Sensation of reality refers to the ability of users to feel present in a multimedia experience. As 3D technologies target to provide more immersive and higher quality multimedia experiences, it is important to understand Quality of Experience (QoE) and sen ...

2014

EEG correlates during video quality perception

Touradj Ebrahimi, Philippe Hanhart, Jong Seok Lee, Eleni Kroupi, Martin Rerabek

Understanding Quality of Experience (QoE) in various multimedia contents is still challenging. In this paper, we investigate the way QoE affects brain oscillations captured by electroencephalography (EEG). In particular, sixteen subjects watched 2D and 3D ...

2014

JPEG backward compatible format for 3D content representation

Touradj Ebrahimi, Philippe Hanhart, Martin Rerabek

Different formats and compression algorithms have been proposed for 3D video content, but 3D images are still mostly represented as a stereo pair only. However, for enhanced 3D rendering capabilities, such as depth perception adjustment or display size ada ...

2013

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