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Touradj Ebrahimi

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Publications associées (306)

Towards the Need Satisfaction in Gaming: A comparison of different gaming platforms

Touradj Ebrahimi, Anne-Flore Nicole Marie Perrin

Recent advances in Virtual Reality (VR) technologies have resulted in a wider availability of Head Mounted Displays (HMDs). However, it is still unclear if VR gaming offers a substantial added value to players. For this reason a comparison of gaming experi ...

2017

JPEG XS call for proposals subjective evaluations

Touradj Ebrahimi, Benoît Macq

Spie-Int Soc Optical Engineering2017

High Dynamic Range Imaging Technology

Touradj Ebrahimi

Institute of Electrical and Electronics Engineers2017

On subjective and objective quality evaluation of point cloud geometry

Touradj Ebrahimi, Evangelos Alexiou

Point clouds have emerged as a promising solution for immersive representation of 3D contents. In this paper an interactive subjective quality assessment for point clouds is proposed. Quality assessment of geometry information in point clouds subject to re ...

2017

Evaluation and Prediction of Evoked Emotions Induced by Image Manipulations

Touradj Ebrahimi, Lin Yuan

Various image editing tools make our pictures more attractive, and at the same time, evoke different emotional responses. With powerful and easy-to-use imaging applications, capturing, editing and then sharing pictures have become daily life for many. This ...

2017

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

Evaluation of JPEG XT for high dynamic range cameras

Touradj Ebrahimi, Philippe Hanhart

Modern cameras can be used to capture high dynamic range (HDR) images by taking multiple low dynamic range (LDR) pictures at different exposure settings. However, DSLR cameras often store the multiple exposure pictures, which increases storage requirements ...

Elsevier Science Bv2017

Image Privacy Protection with Secure JPEG Transmorphing

Touradj Ebrahimi, Lin Yuan

Thanks to advancements in smart mobile devices and social media platforms, sharing photos and experiences has significantly bridged our lives, allowing us to stay connected despite distance and other barriers. However, concern on privacy has also been rais ...

Inst Engineering Technology-Iet2017

Towards an implicit time-continuous assessment of Quality of Experience for immersive multimedia

Touradj Ebrahimi, Anne-Flore Nicole Marie Perrin

Quality of Experience (QoE) is a time-varying perceptual process. Despite its complexity and numerous impacting factors, recent efforts have been made to come up with subjective assessment methodologies of QoE. However, no time-continuous variant of subjec ...

2017

JPEG Privacy and Security framework for social networking and GLAM services

Touradj Ebrahimi

Current image coding standards provide limited support for privacy and security features. An exception is the JPSEC standard, which defines security extensions in JPEG 2000 specifications (part 8). Notwithstanding this shortcoming, the JPEG committee is cu ...

Springer International Publishing Ag2017

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 metrics to predict quality in point cloud representations

Touradj Ebrahimi, Evangelos Alexiou

Point clouds are a promising alternative for immersive representation of visual contents. Recently, an increased interest has been observed in the acquisition, processing and rendering of this modality. Although subjective and objective evaluations are cri ...

Spie-Int Soc Optical Engineering2017

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

Towards subjective quality assessment of point cloud imaging in augmented reality

Touradj Ebrahimi, Evgeniy Upenik, Evangelos Alexiou

Recently, there has been an increased interest in capture, processing and rendering of visual content in form of point clouds. Among other challenges, subjective and objective quality evaluation of point clouds are still open problems. Most proposed subjec ...

2017

Context-Dependent Privacy-Aware Photo Sharing based on Machine Learning

Touradj Ebrahimi, Lin Yuan, Joël Régis Theytaz

Photo privacy has raised a growing concern with the advancements of image analytics, face recognition, and deep learning techniques widely applied on social media. If properly deployed, these powerful techniques can in turn assist people in enhancing their ...

2017

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

JPEG XT: A Compression Standard for HDR and WCG Images [Standards in a Nutshell]

Touradj Ebrahimi, Philippe Hanhart

High bit depth data acquisition and manipulation have been largely studied at the academic level over the last 15 years and are rapidly attracting interest at the industrial level. An example of the increasing interest for high-dynamic range (HDR) imaging ...

Institute of Electrical and Electronics Engineers2016

Food/Non-food Image Classification and Food Categorization using Pre-Trained GoogLeNet Model

Touradj Ebrahimi, Lin Yuan, Ashutosh Singla

Recent past has seen a lot of developments in the field of image-based dietary assessment. Food image classification and recognition are crucial steps for dietary assessment. In the last couple of years, advancements in the deep learning and convolutional ...

Assoc Computing Machinery2016

Evaluation of Color Mapping Algorithms in Different Color Spaces

Touradj Ebrahimi

The color gamut supported by current commercial displays is only a subset of the full spectrum of colors visible by the human eye. In High-Definition (HD) television technology, the scope of the supported colors covers 35.9% of the full visible gamut. For ...

Spie-Int Soc Optical Engineering2016

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

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