Prof. Touradj Ebrahimi Profile

Prof. Touradj Ebrahimi

Professor at Ecole Polytechnique Fédérale de Lausanne

SPIE Involvement:

Conference Program Committee | Conference Chair | Editor | Author | Instructor

Area of Expertise:

Image compression , Video compression , Imaging security , Artificial intelligence , Computer vision , Man machine interface

Websites:

Company Website

Publications (130)

Proceedings Article | 4 October 2023 Presentation + Paper

Improving deepfake detectors against real-world perturbations with amplitude-phase switch augmentation

Yuhang Lu, Ruizhi Luo, Touradj Ebrahimi

Proceedings Volume 12674, 1267402 (2023) https://doi.org/10.1117/12.2676400

KEYWORDS: Education and training, Counterfeit detection, Video, Video compression, Switches, Facial recognition systems, Data modeling, Image processing, Image classification, Tunable filters

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Proceedings Article | 4 October 2023 Presentation + Paper

Towards learning-based image compression for storage on DNA support

Sophie Strebel, Noémie Monnier, Davi Lazzarotto, Michela Testolina, Touradj Ebrahimi

Proceedings Volume 12674, 126740V (2023) https://doi.org/10.1117/12.2677356

KEYWORDS: Image compression, Image quality, Data storage, Image storage, Image processing, Molecules

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Proceedings Article | 4 October 2023 Presentation + Paper

Explanation of face recognition via saliency maps

Yuhang Lu, Touradj Ebrahimi

Proceedings Volume 12674, 126740U (2023) https://doi.org/10.1117/12.2677353

KEYWORDS: Facial recognition systems, Visualization, Detection and tracking algorithms, Visual process modeling, Data modeling, Image processing, Image classification, Education and training, Decision making, Systems modeling

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Proceedings Article | 4 October 2023 Presentation + Paper

Evaluation of the impact of lossy compression on event camera-based computer vision tasks

Bowen Huang, Davi Lazzarotto, Touradj Ebrahimi

Proceedings Volume 12674, 126740C (2023) https://doi.org/10.1117/12.2676419

KEYWORDS: Point clouds, Image compression, Cameras, Optical flow, Video, Video coding, Data compression, LIDAR, Information visualization, Image restoration

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Proceedings Article | 4 October 2023 Presentation + Paper

On the assessment of high-quality images: advances on the JPEG AIC-3 activity

Michela Testolina, Evgeniy Upenik, Touradj Ebrahimi

Proceedings Volume 12674, 126740Q (2023) https://doi.org/10.1117/12.2677347

KEYWORDS: Image quality, Image compression, Image quality standards, Visual compression, Image processing, Image visualization, Standards development

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Proceedings Article | 4 October 2023 Paper

Validation and assessment of a mixed reality solution for enhanced TV viewer engagement

Øyvind Sørdal Klungre, Asim Hameed, Touradj Ebrahimi, Andrew Perkis

Proceedings Volume 12674, 1267406 (2023) https://doi.org/10.1117/12.2683883

KEYWORDS: Video, Mixed reality, Iterated function systems, Super resolution, Mobile devices, Windows, Image processing, Displays, Video processing

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Proceedings Article | 7 June 2023 Presentation + Paper

Towards learning-based denoising of light fields

Tomás Soares De Carvalho Feith, Michela Testolina, Touradj Ebrahimi

Proceedings Volume 12571, 1257109 (2023) https://doi.org/10.1117/12.2666000

KEYWORDS: Denoising, Machine learning, Image denoising, Visualization, Image processing, Cameras, 3D modeling

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Proceedings Article | 3 October 2022 Presentation + Paper

On combining denoising with learning-based image decoding

Léo Larigauderie, Michela Testolina, Touradj Ebrahimi

Proceedings Volume 12226, 122260M (2022) https://doi.org/10.1117/12.2636682

KEYWORDS: Denoising, Image compression, Visualization, Artificial intelligence, Image processing, Image quality, Image denoising

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Proceedings Article | 3 October 2022 Presentation + Paper

A novel assessment framework for learning-based deepfake detectors in realistic conditions

Yuhang Lu, Touradj Ebrahimi

Proceedings Volume 12226, 122260N (2022) https://doi.org/10.1117/12.2636683

KEYWORDS: Performance modeling, Image compression, Video processing, Image enhancement

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Proceedings Article | 3 October 2022 Presentation + Paper

Towards JPEG AIC part 3: visual quality assessment of high to visually lossless image coding

Michela Testolina, Evgeniy Upenik, Jon Sneyer, Touradj Ebrahimi

Proceedings Volume 12226, 122260D (2022) https://doi.org/10.1117/12.2636687

KEYWORDS: Image quality, Image compression, Image quality standards

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Due to the increasing number of pictures captured and stored every day by and on digital devices, lossy image compression has become inevitable to limit the needed storage requirement. As a consequence, these compression methods might introduce some visual artifacts, whose visibility depends on the chosen bitrate. Modern applications target images with high to near-visually lossless quality, in order to maximize the visual quality while still reducing storage space consumption. In this context, subjective and objective image quality assessment are essential tools in order to develop compression methods able to generate images with high visual quality. While a large variety of subjective quality assessment protocols have been standardized in the past, they have been found to be imprecise in the quality interval from high to near-visually lossless. Similarly, an objective quality metric designed to work specifically in the mentioned range has not been designed yet. As current quality assessment methodologies have proven to be unreliable, a renewed activity on the Assessment of Image Coding, also referred to as JPEG AIC, was recently launched by the JPEG Committee. The goal of this activity is to extend previous standardization efforts, i.e. AIC Part 1 and AIC Part 2 (also know as AIC-1 and AIC-2), by developing a new standard, known as AIC Part 3 (or AIC-3). Notably, the goal of the activity is to standardize both subjective and objective visual quality assessment methods, specifically targeting images with quality in the range from high to near-visually lossless. Two Draft Calls for Contributions on Subjective Image Quality Assessment1, 2 were released, aiming at collecting contributions on new methods and best practices for subjective image quality assessment in the target quality range, while a Call for Proposals on Objective Image Quality Assessment is expected to be released at a later date. This paper aims at summarizing past JPEG AIC efforts and reviewing the main objectives of the future activities, outlining the scope of the activity, the main use cases and requirements, and call for contributions. Finally, conclusions on the activity are drawn.

Proceedings Article | 3 October 2022 Presentation + Paper

AI-based telepresence for broadcast applications

Henrique Piñeiro Monteagudo, Rayan Daod Nathoo, Laurent Deillon, Changsheng Gao, Touradj Ebrahimi

Proceedings Volume 12226, 1222610 (2022) https://doi.org/10.1117/12.2638229

KEYWORDS: Video, Super resolution, Video processing, Video acceleration, Image processing, Artificial intelligence

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Proceedings Article | 3 October 2022 Presentation + Paper

Effective know-your-customer method for secure and trustworthy non-fungible tokens in media assets

Clément Sanh, Kambiz Homayounfar, Touradj Ebrahimi

Proceedings Volume 12226, 122261C (2022) https://doi.org/10.1117/12.2636679

KEYWORDS: Facial recognition systems, Image processing, Biometrics

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Proceedings Article | 3 October 2022 Presentation + Paper

Integrated learning-based point cloud compression for geometry and color with graph Fourier transforms

Davi Lazzarotto, Touradj Ebrahimi

Proceedings Volume 12226, 122260U (2022) https://doi.org/10.1117/12.2636681

KEYWORDS: 3D modeling

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Proceedings Article | 3 October 2022 Paper

Towards effective visual information storage on DNA support

Luka Secilmis, Michela Testolina, Davi Lazzarotto, Touradj Ebrahimi

Proceedings Volume 12226, 1222605 (2022) https://doi.org/10.1117/12.2636678

KEYWORDS: Data storage, Image compression

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Proceedings Article | 17 May 2022 Presentation + Paper

Media security framework inspired by emerging challenges in fake media and NFT

Frederik Temmermans, Deepayan Bhowmik, Fernando Pereira, Touradj Ebrahimi

Proceedings Volume 12138, 121380P (2022) https://doi.org/10.1117/12.2622223

KEYWORDS: Information security, Ecosystems, Standards development, Image compression, New and emerging technologies, Multimedia, Video, Neural networks, Image processing, Human-machine interfaces

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Proceedings Article | 1 August 2021 Presentation + Paper

Towards super resolution in the compressed domain of learning-based image codecs

Evgeniy Upenik, Michela Testolina, Touradj Ebrahimi

Proceedings Volume 11842, 118421N (2021) https://doi.org/10.1117/12.2597833

KEYWORDS: Image compression, Super resolution, Visualization, Image quality, Image resolution, Image processing, Neural networks

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Proceedings Article | 1 August 2021 Presentation + Paper

JPEG Fake Media: a provenance-based sustainable approach to secure and trustworthy media annotation

Frederik Temmermans, Deepayan Bhowmik, Fernando Pereira, Touradj Ebrahimi

Proceedings Volume 11842, 118420L (2021) https://doi.org/10.1117/12.2597556

KEYWORDS: Information visualization, Visualization, Photography, Standards development, Cameras, Artificial intelligence, Information security, Digital forensics, Image compression

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Proceedings Article | 1 August 2021 Presentation + Paper

Learning residual coding for point clouds

Davi Lazzarotto, Touradj Ebrahimi

Proceedings Volume 11842, 118420S (2021) https://doi.org/10.1117/12.2597814

KEYWORDS: Computer programming, Distortion, Visualization, Scalable video coding, Image compression, Standards development, LIDAR, 3D modeling, Virtual reality

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Proceedings Article | 1 August 2021 Presentation + Paper

Towards a secure and trustworthy imaging with non-fungible tokens

Nicolas Martinod, Kambiz Homayounfar, Davi Lazzarotto, Evgeniy Upenik, Touradj Ebrahimi

Proceedings Volume 11842, 1184218 (2021) https://doi.org/10.1117/12.2598436

KEYWORDS: Standards development, Legal, Digital imaging, Computer security

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Proceedings Article | 1 August 2021 Presentation + Paper

Review of subjective quality assessment methodologies and standards for compressed images evaluation

Michela Testolina, Touradj Ebrahimi

Proceedings Volume 11842, 118420Y (2021) https://doi.org/10.1117/12.2597813

KEYWORDS: Visualization, Image compression, Image quality, Image quality standards, Visual compression, Standards development, Image analysis

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Proceedings Article | 1 August 2021 Presentation + Paper

Towards image denoising in the latent space of learning-based compression

Michela Testolina, Evgeniy Upenik, Touradj Ebrahimi

Proceedings Volume 11842, 118421A (2021) https://doi.org/10.1117/12.2597828

KEYWORDS: Denoising, Image compression, Visualization, Image denoising, Image processing, Visual compression, Image quality, Cameras

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SPIE Journal Paper | 25 June 2021 Open Access

Special Section Guest Editorial: Image and Video Compression Using Deep Neural Networks

Ofer Hadar, Touradj Ebrahimi

JEI, Vol. 30, Issue 04, 041401, (June 2021) https://doi.org/10.1117/12.10.1117/1.JEI.30.4.041401

KEYWORDS: Image compression, Video compression, Neural networks, Image quality, Standards development, Video, Head, Evolutionary algorithms, Scanning probe lithography, Multimedia signal processing

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Proceedings Article | 21 August 2020 Presentation

Opening Remarks by Conference Chairs

Touradj Ebrahimi, Andrew Tescher

Proceedings Volume 11510, 1151004 (2020) https://doi.org/10.1117/12.2581407

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Proceedings Article | 21 August 2020 Presentation + Paper

Privacy-preserving photo sharing based on blockchain

Pablo Pfister, Touradj Ebrahimi

Proceedings Volume 11510, 1151025 (2020) https://doi.org/10.1117/12.2569524

KEYWORDS: Resistance, Information operations, Image encryption, Cryptography, Multimedia signal processing, Data storage, Symmetric-key encryption

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Proceedings Article | 21 August 2020 Presentation + Paper

Comprehensive assessment of image compression algorithms

Michela Testolina, Evgeniy Upenik, Touradj Ebrahimi

Proceedings Volume 11510, 1151020 (2020) https://doi.org/10.1117/12.2569255

KEYWORDS: Image compression, Image quality, Visual compression, Transparency, Standards development

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Proceedings Article | 21 August 2020 Presentation + Paper

High dynamic range image sharing with privacy protection

Evgeniy Upenik, Pol Fernandez Marti, Touradj Ebrahimi

Proceedings Volume 11510, 1151023 (2020) https://doi.org/10.1117/12.2569112

KEYWORDS: High dynamic range imaging, Image restoration, Image processing, LCDs, Computer programming, Cameras, Reconstruction algorithms, Visualization, Image encryption

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Sharing pictures has become a very popular practice among consumers. Most recent cameras, displays, and smartphones can capture and display images in high dynamic range and wide colour gamut, contributing to an increase of this type of content. It is a well-known fact that pictures contain information that could cause various security and privacy issues. This is in particular true because high dynamic range pictures exhibit more information when compared to conventional images resulting in an increased invasion of privacy. Lack of proper solutions to overcome privacy can hinder a wide spread adoption of high dynamic range pictures shared in social networks. For example, dark areas of a content that are otherwise difficult to view in a conventional picture become more visible. It is therefore natural that mechanisms are offered to protect privacy while sharing pictures also in high dynamic range. In this paper, we propose an architecture to share high dynamic range images captured by high-end smartphones while offering a mechanism to protect privacy. In our approach, the high dynamic range picture is tone-mapped into a lower dynamic range version which reduces its degree of invasiveness as far as privacy is concerned. Eventually, any remaining privacy sensitive areas in the picture can be further protected (blurring of faces, masking cars licence plates, etc.). The core of the proposed architecture conforms to both JPEG XT, a recently standardised format that offers backward compatibility with legacy JPEG and to JPEG Systems under development. The proposed solution allows to publicly share a protected version of the high dynamic range image tone-mapped to a standard dynamic range picture. The latter can go through transmorphing operation to further protect it. Authorised users can access the original high dynamic range picture. The architecture as described above has been implemented as an app for smartphones running Android OS. We demonstrate feasibility and usefulness of this approach and discuss its advantages when compared to conventional image sharing such as those used in social networks.

Proceedings Article | 21 August 2020 Presentation + Paper

Towards neural network approaches for point cloud compression

Evangelos Alexiou, Kuan Tung, Touradj Ebrahimi

Proceedings Volume 11510, 1151008 (2020) https://doi.org/10.1117/12.2569115

KEYWORDS: Clouds, Data modeling, Distortion, Performance modeling, Visualization, Network architectures, Neural networks

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Proceedings Article | 21 August 2020 Presentation + Paper

Machine learning based detection of digital documents maliciously recaptured from displays

Saleh Gholam-Zadeh, Evgeniy Upenik, Guy Hatarsi, Touradj Ebrahimi

Proceedings Volume 11510, 115100U (2020) https://doi.org/10.1117/12.2569256

KEYWORDS: Data modeling, Machine learning, Digital imaging, Image forensics

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Proceedings Article | 13 April 2020 Presentation + Paper

Exploration of media block chain technologies for JPEG privacy and security

Frederik Temmermans, Deepayan Bhowmik, Fernando Pereira, Touradj Ebrahimi, Peter Schelkens

Proceedings Volume 11353, 113530U (2020) https://doi.org/10.1117/12.2556684

KEYWORDS: Standards development, Computer security, Information security, Image processing, Photography, Multimedia, Ecosystems, Image compression

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Proceedings Article | 1 April 2020 Presentation + Paper

Learning-based image coding: early solutions reviewing and subjective quality evaluation

Joao Ascenso, Pinar Akyazi, Fernando Pereira, Touradj Ebrahimi

Proceedings Volume 11353, 113530S (2020) https://doi.org/10.1117/12.2555368

KEYWORDS: Image compression, Image quality, Neural networks, Quantization, Computer programming, Visualization, Data modeling, RGB color model, Transform theory, Image classification

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Nowadays, image and video are the data types that consume most of the resources of modern communication channels, both in fixed and wireless networks. Thus, it is vital to compress visual data as much as possible, while maintaining some target quality level, to enable efficient storage and transmission. Deep learning (DL) image coding solutions, typically using an auto-encoder architecture, promise significant improvements in compression efficiency. These methods adopt a novel coding approach where the encoder-decoder architecture is mostly based on neural networks, notably with analysis and synthesis transforms learned from a large amount of training data and an appropriate loss function. There are limited amount of works targeting the subjective evaluation of DL learning-based image coding solutions compression performance. Since learning-based image codecs use complex and highly non-linear generative models, very different artifacts are present in the decoded images, when compared to conventional artifacts such as blockiness, blurring and ringing distortions typical of traditional DCT block-based and wavelet image coding. In this context, the main objective of this paper is to review, characterize and evaluate some of the most relevant learning-based image coding solutions in the literature. Regarding the subjective quality evaluation, the assessment tests were conducted during the 84th JPEG meeting in Brussels, Belgium, by a mix of experts and naive observers. These subjective tests evaluated the performance of five state-of-the-art learning-based image coding solutions against four conventional, standard image coding (HEVC, WebP, JPEG 2000 and JPEG), applied to eight natural images, at four different coding bitrates. The experimental results obtained show that the subjective quality obtained with the selected learning-based image coding solution are competitive with conventional codecs. Moreover, a thorough inspection on the visual results has revealed some of the typical artifacts encountered in the learning -based image coding.

Proceedings Article | 1 April 2020 Presentation + Paper

Benchmarking JPEG XL image compression

Jyrki Alakuijala, Sami Boukortt, Touradj Ebrahimi, Evgenii Kliuchnikov, Jon Sneyers, Evgeniy Upenik, Lode Vandevenne‎, Luca Versari, Jan Wassenberg

Proceedings Volume 11353, 113530X (2020) https://doi.org/10.1117/12.2556264

KEYWORDS: Image compression, Computer programming, Visualization, Image quality, Photography, Image processing, Visual compression, Internet, Multimedia signal processing, Standards development

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Proceedings Article | 6 September 2019 Presentation + Paper

A new end-to-end image compression system based on convolutional neural networks

Pinar Akyazi, Touradj Ebrahimi

Proceedings Volume 11137, 111370M (2019) https://doi.org/10.1117/12.2530195

KEYWORDS: Image compression, Computer programming, Quantization, Wavelets, Convolutional neural networks, Image quality, Network architectures, Image processing, Transform theory, Wavelet transforms

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Proceedings Article | 6 September 2019 Paper

Rendering-dependent compression and quality evaluation for light field contents

Irene Viola, Keita Takahashi, Toshiaki Fujii, Touradj Ebrahimi

Proceedings Volume 11137, 111371I (2019) https://doi.org/10.1117/12.2530198

KEYWORDS: Visualization, Prototyping, Signal to noise ratio, Visual compression, Image compression, Computer programming, Statistical analysis, Visual analytics

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Proceedings Article | 6 September 2019 Presentation + Paper

Assessment of quality of JPEG XL proposals based on subjective methodologies and objective metrics

Pinar Akyazi, Touradj Ebrahimi

Proceedings Volume 11137, 111370N (2019) https://doi.org/10.1117/12.2530196

KEYWORDS: RGB color model, Standards development, Molybdenum, Computer programming, Image resolution, Visualization, Image storage, High dynamic range imaging, Image compression, Image quality

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Proceedings Article | 17 September 2018 Presentation + Paper

A graph learning approach for light field image compression

Irene Viola, Hermina Petric Maretic, Pascal Frossard, Touradj Ebrahimi

Proceedings Volume 10752, 107520E (2018) https://doi.org/10.1117/12.2322827

KEYWORDS: Image compression, Data storage, Visualization

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Proceedings Article | 17 September 2018 Presentation + Paper

Overview of the JPEG XS core coding system subjective evaluations

Alexandre Willème, Saeed Mahmoudpour , Irene Viola, Karel Fliegel, Jakub Pospíšil, Touradj Ebrahimi, Peter Schelkens, Antonin Descampe, Benoit Macq

Proceedings Volume 10752, 107521M (2018) https://doi.org/10.1117/12.2323435

KEYWORDS: Visualization, Video, Video compression, Image compression, Visual compression, Image quality standards, Video acceleration, Standards development, Discrete wavelet transforms, Transparency

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Proceedings Article | 17 September 2018 Presentation + Paper

A novel methodology for quality assessment of voxelized point clouds

Eric Torlig, Evangelos Alexiou, Tiago Fonseca, Ricardo de Queiroz, Touradj Ebrahimi

Proceedings Volume 10752, 107520I (2018) https://doi.org/10.1117/12.2322741

KEYWORDS: Quality measurement

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Proceedings Article | 17 September 2018 Presentation + Paper

A new objective metric to predict image quality using deep neural networks

Pinar Akyazi, Touradj Ebrahimi

Proceedings Volume 10752, 107521Q (2018) https://doi.org/10.1117/12.2322709

KEYWORDS: Image quality, Feature extraction, Wavelets, Data modeling, Image compression, Neural networks, Visual process modeling

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Proceedings Article | 17 September 2018 Presentation + Paper

JPEG Pleno: a standard framework for representing and signaling plenoptic modalities

Peter Schelkens, Zahir Alpaslan, Touradj Ebrahimi, Kwan-Jung Oh, Fernando Pereira, Antonio M. Pinheiro, Ioan Tabus, Zhibo Chen

Proceedings Volume 10752, 107521P (2018) https://doi.org/10.1117/12.2323404

KEYWORDS: Holography, Clouds, Image compression, Standards development, Image processing, Visualization, Image quality standards, Databases, Computer programming, Holograms

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Proceedings Article | 17 September 2018 Presentation + Paper

Point cloud subjective evaluation methodology based on reconstructed surfaces

Evangelos Alexious, Antonio M. Pinheiro, Carlos Duarte, Dragan Matković, Emil Dumić, Luis da Silva Cruz, Lovorka Gotal Dmitrović, Marco Bernardo, Manuela Pereira, Touradj Ebrahimi

Proceedings Volume 10752, 107520H (2018) https://doi.org/10.1117/12.2321518

KEYWORDS: Clouds, Visualization, 3D displays, Video, 3D visualizations

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Proceedings Article | 19 September 2017 Presentation + Paper

Measuring quality of omnidirectional high dynamic range content

Anne-Flore Perrin, Cambodge Bist, Rémi Cozot, Touradj Ebrahimi

Proceedings Volume 10396, 1039613 (2017) https://doi.org/10.1117/12.2275146

KEYWORDS: High dynamic range imaging, Head-mounted displays, Associative arrays, Multimedia

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Proceedings Article | 19 September 2017 Presentation + Paper

On the performance of metrics to predict quality in point cloud representations

Evangelos Alexiou, Touradj Ebrahimi

Proceedings Volume 10396, 103961H (2017) https://doi.org/10.1117/12.2275142

KEYWORDS: Clouds, Multimedia

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Proceedings Article | 19 September 2017 Presentation + Paper

JPEG XS call for proposals subjective evaluations

David McNally, Tim Bruylants, Alexandre Willème, Touradj Ebrahimi, Peter Schelkens, Benoit Macq

Proceedings Volume 10396, 103960P (2017) https://doi.org/10.1117/12.2275137

KEYWORDS: Statistical analysis, Multimedia

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Proceedings Article | 19 September 2017 Presentation + Paper

A new framework for interactive quality assessment with application to light field coding

Irene Viola, Touradj Ebrahimi

Proceedings Volume 10396, 103961F (2017) https://doi.org/10.1117/12.2275136

KEYWORDS: Image compression, Video coding, Multimedia, Computational imaging, Image processing

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Proceedings Article | 28 September 2016 Presentation + Paper

Towards an animated JPEG

Joël Theytaz, Lin Yuan, David McNally, Touradj Ebrahimi

Proceedings Volume 9971, 99711X (2016) https://doi.org/10.1117/12.2240283

KEYWORDS: Image compression, Image quality standards, Image quality, Image segmentation, Video, Visualization, Computer programming, Prototyping, Internet, Photography

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Proceedings Article | 28 September 2016 Presentation + Paper

JPEG backward compatible coding of omnidirectional images

Martin Řeřábek, Evgeniy Upenik, Touradj Ebrahimi

Proceedings Volume 9971, 99711O (2016) https://doi.org/10.1117/12.2240281

KEYWORDS: Image compression, Video, Visualization, Panoramic photography, Spherical lenses, Visual process modeling, Computer programming, Visual compression, Information visualization, Optical spheres

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Proceedings Article | 27 September 2016 Presentation + Paper

A new approach to subjectively assess quality of plenoptic content

Irene Viola, Martin Řeřábek, Touradj Ebrahimi

Proceedings Volume 9971, 99710X (2016) https://doi.org/10.1117/12.2240279

KEYWORDS: Image quality, Video, Image compression, Visualization, Cameras, Electroluminescent displays, Image resolution, Data acquisition, Visual compression, Human-machine interfaces

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Proceedings Article | 27 September 2016 Presentation + Paper

Evaluation of color mapping algorithms in different color spaces

Timothée-Florian Bronner, Ronan Boitard, Mahsa Pourazad, Panos Nasiopoulos, Touradj Ebrahimi

Proceedings Volume 9971, 99710H (2016) https://doi.org/10.1117/12.2238435

KEYWORDS: Televisions, Visible radiation, Associative arrays, Eye, Distortion, Video, CIE 1931 color space, Visualization, Image analysis, Image quality

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Proceedings Article | 22 September 2015 Paper

The JPEG XT suite of standards: status and future plans

Thomas Richter, Tim Bruylants, Peter Schelkens, Touradj Ebrahimi

Proceedings Volume 9599, 95990T (2015) https://doi.org/10.1117/12.2189873

KEYWORDS: High dynamic range imaging, Computer programming, Image quality standards, Image compression, Standards development, Computer security, Image processing, RGB color model, Opacity, Image quality

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Proceedings Article | 22 September 2015 Paper

Privacy-preserving photo sharing based on a public key infrastructure

Lin Yuan, David McNally, Alptekin Küpçü, Touradj Ebrahimi

Proceedings Volume 9599, 95991I (2015) https://doi.org/10.1117/12.2190458

KEYWORDS: Image encryption, Symmetric-key encryption, Amplitude shift keying, Prototyping, Image processing, Web 2.0 technologies, Information operations, Computer security, Information visualization, Cryptography

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Proceedings Article | 22 September 2015 Paper

Towards high dynamic range extensions of HEVC: subjective evaluation of potential coding technologies

Philippe Hanhart, Martin Řeřábek, Touradj Ebrahimi

Proceedings Volume 9599, 95990G (2015) https://doi.org/10.1117/12.2193832

KEYWORDS: High dynamic range imaging, Video, Video coding, Computer programming, Visualization, Video compression, RGB color model, Standards development, Error analysis, Multimedia signal processing

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Proceedings Article | 22 September 2015 Paper

The impact of privacy protection filters on gender recognition

Natacha Ruchaud, Grigory Antipov, Pavel Korshunov, Jean-Luc Dugelay, Touradj Ebrahimi, Sid-Ahmed Berrani

Proceedings Volume 9599, 959906 (2015) https://doi.org/10.1117/12.2193647

KEYWORDS: Facial recognition systems, Image filtering, Detection and tracking algorithms, Optical filters, Human vision and color perception, Machine vision, Computer vision technology, Video surveillance, Cameras, Gait analysis

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Proceedings Article | 17 March 2015 Paper

Using false colors to protect visual privacy of sensitive content

Serdar Çiftçi, Pavel Korshunov, Ahmet Akyüz, Touradj Ebrahimi

Proceedings Volume 9394, 93941L (2015) https://doi.org/10.1117/12.2083189

KEYWORDS: Detection and tracking algorithms, Visualization, Facial recognition systems, Video surveillance, Lab on a chip, Video, Image compression, Machine vision, Computer vision technology, Image visualization

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Proceedings Article | 23 September 2014 Paper

Comparison of compression efficiency between HEVC/H.265 and VP9 based on subjective assessments

Martin Řeřábek, Touradj Ebrahimi

Proceedings Volume 9217, 92170U (2014) https://doi.org/10.1117/12.2065561

KEYWORDS: Computer programming, Video, Video coding, Video compression, Molybdenum, Visualization, Standards development, Televisions, LCDs, Internet

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Proceedings Article | 23 September 2014 Paper

Crowdsourcing evaluation of high dynamic range image compression

Philippe Hanhart, Pavel Korshunov, Touradj Ebrahimi

Proceedings Volume 9217, 92170D (2014) https://doi.org/10.1117/12.2065560

KEYWORDS: High dynamic range imaging, Time multiplexed optical shutter, Image compression, Image quality, Visualization, Image analysis, Digital imaging, Standards development, Visual compression, Video

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Proceedings Article | 23 September 2014 Paper

Subjective evaluation of higher dynamic range video

Philippe Hanhart, Pavel Korshunov, Touradj Ebrahimi

Proceedings Volume 9217, 92170L (2014) https://doi.org/10.1117/12.2076644

KEYWORDS: Video, High dynamic range imaging, Molybdenum, Visualization, RGB color model, Display technology, Modulation, Televisions, Image compression, Video compression

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Proceedings Article | 23 September 2014 Paper

Evaluation of privacy in high dynamic range video sequences

Martin Řeřábek, Lin Yuan, Lukáš Krasula, Pavel Korshunov, Karel Fliegel, Touradj Ebrahimi

Proceedings Volume 9217, 92170E (2014) https://doi.org/10.1117/12.2065559

KEYWORDS: High dynamic range imaging, Video, Video surveillance, Cameras, Surveillance, Visualization, Imaging systems, High dynamic range image sensors, Video processing, Sensors

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Proceedings Article | 15 May 2014 Paper

Crowdsourcing-based evaluation of privacy in HDR images

Pavel Korshunov, Hiromi Nemoto, Athanassios Skodras, Touradj Ebrahimi

Proceedings Volume 9138, 913802 (2014) https://doi.org/10.1117/12.2054541

KEYWORDS: High dynamic range imaging, Cameras, Image fusion, Video, Video surveillance, Facial recognition systems, Light sources and illumination, Detection and tracking algorithms, Range imaging, Photography

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Proceedings Article | 6 March 2014 Paper

Subjective quality assessment for stereoscopic video: case study on robust watermarking

R. Bensaied, M. Mitrea, A. Chammem, T. Ebrahimi

Proceedings Volume 9011, 90110B (2014) https://doi.org/10.1117/12.2042509

KEYWORDS: Video, Image quality, Molybdenum, Visualization, Digital watermarking, Statistical analysis, 3D displays, Principal component analysis, Color vision, 3D image reconstruction

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Proceedings Article | 6 March 2014 Paper

Subjective evaluation of two stereoscopic imaging systems exploiting visual attention to improve 3D quality of experience

Philippe Hanhart, Touradj Ebrahimi

Proceedings Volume 9011, 90110D (2014) https://doi.org/10.1117/12.2040465

KEYWORDS: Visualization, Eye, Video, 3D displays, Stereoscopic displays, Image quality, Optical tracking, 3D image processing, 3D modeling, Imaging systems

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Proceedings Article | 6 March 2014 Paper

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

Alexandre Chappuis, Martin Rerabek, Philippe Hanhart, Touradj Ebrahimi

Proceedings Volume 9011, 90110S (2014) https://doi.org/10.1117/12.2040391

KEYWORDS: Eye, Cameras, Autostereoscopic displays, 3D displays, Facial recognition systems, Image quality, 3D image processing, Visualization, Tolerancing, Mobile devices

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Proceedings Article | 25 February 2014 Paper

Audiovisual focus of attention and its application to Ultra High Definition video compression

Martin Rerabek, Hiromi Nemoto, Jong-Seok Lee, Touradj Ebrahimi

Proceedings Volume 9014, 901407 (2014) https://doi.org/10.1117/12.2047850

KEYWORDS: Visualization, Video, Source localization, Computer programming, Video coding, Video compression, Image compression, Image quality, Detection and tracking algorithms, Mouth

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SPIE Journal Paper | 1 November 2013 Open Access

Special Section Guest Editorial: High Dynamic Range Imaging

Touradj Ebrahimi, Andrew Tescher

OE, Vol. 52, Issue 10, 102001, (November 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.10.102001

KEYWORDS: High dynamic range imaging, Image fusion, Image compression, Image quality, Video, Infrared imaging, Video surveillance, Standards development, Super resolution, Optical engineering

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Proceedings Article | 26 September 2013 Paper

Automatic defect detection in video archives: application to Montreux Jazz Festival digital archives

Philippe Hanhart, Martin Rerabek, Ivan Ivanov, Alain Dufaux, Caryl Jones, Alexandre Delidais, Touradj Ebrahimi

Proceedings Volume 8856, 88560R (2013) https://doi.org/10.1117/12.2026875

KEYWORDS: Video, Databases, Defect detection, Detection and tracking algorithms, Algorithm development, Video processing, Curium, Head, Signal processing, Analog electronics

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Proceedings Article | 26 September 2013 Paper

Framework for objective evaluation of privacy filters

Pavel Korshunov, Andrea Melle, Jean-Luc Dugelay, Touradj Ebrahimi

Proceedings Volume 8856, 88560T (2013) https://doi.org/10.1117/12.2027040

KEYWORDS: Video surveillance, Facial recognition systems, Video, Detection and tracking algorithms, Surveillance, Principal component analysis, Opacity, Visualization, Cameras, Surveillance systems

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Proceedings Article | 26 September 2013 Paper

PEViD: privacy evaluation video dataset

Pavel Korshunov, Touradj Ebrahimi

Proceedings Volume 8856, 88561S (2013) https://doi.org/10.1117/12.2030974

KEYWORDS: Video surveillance, Video, Surveillance, Visualization, Analytics, Skin, Information visualization, Glasses, Video processing, Visual analytics

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SPIE Journal Paper | 19 August 2013

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

Pavel Korshunov, Touradj Ebrahimi

OE, Vol. 52, Issue 10, 102006, (August 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.10.102006

KEYWORDS: High dynamic range imaging, Image compression, Image quality, Computer programming, Time multiplexed optical shutter, Video compression, Video, Algorithm development, Optical engineering, Cell phones

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Proceedings Article | 15 October 2012 Paper

Subjective quality evaluation of the upcoming HEVC video compression standard

Philippe Hanhart, Martin Rerabek, Francesca De Simone, Touradj Ebrahimi

Proceedings Volume 8499, 84990V (2012) https://doi.org/10.1117/12.946036

KEYWORDS: Video, Video coding, Standards development, Video compression, Molybdenum, Visualization, Televisions, LCDs, Image quality standards, Statistical analysis

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Proceedings Article | 15 October 2012 Paper

A JPEG backward-compatible HDR image compression

Pavel Korshunov, Touradj Ebrahimi

Proceedings Volume 8499, 84990J (2012) https://doi.org/10.1117/12.946037

KEYWORDS: High dynamic range imaging, Image compression, Image quality, Computer programming, Algorithm development, Cell phones, Tablets, Image processing, Video compression, Light sources and illumination

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Proceedings Article | 24 September 2011 Paper

Performance analysis of VP8 image and video compression based on subjective evaluations

Francesca De Simone, Lutz Goldmann, Jong-Seok Lee, Touradj Ebrahimi

Proceedings Volume 8135, 81350M (2011) https://doi.org/10.1117/12.896313

KEYWORDS: Video, Image compression, Image quality, Video compression, Video coding, Standards development, Visualization, Image analysis, Molybdenum, RGB color model

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Proceedings Article | 6 May 2011 Paper

Towards reliable and reproducible 3D video quality assessment

Lutz Goldmann, Touradj Ebrahimi

Proceedings Volume 8043, 804302 (2011) https://doi.org/10.1117/12.887037

KEYWORDS: Video, Multimedia, 3D modeling, Image quality, Visualization, 3D image processing, Video processing, Visual system, Visual process modeling, Reliability

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Proceedings Article | 11 February 2011 Paper

Factors impacting quality of experience in stereoscopic images

Liyuan Xing, Junyong You, Touradj Ebrahimi, Andrew Perkis

Proceedings Volume 7863, 786304 (2011) https://doi.org/10.1117/12.872252

KEYWORDS: Cameras, Molybdenum, Statistical analysis, 3D image processing, Displays, Silver, Projection systems, Stereoscopy, Stereoscopic displays, Image resolution

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Proceedings Article | 8 September 2010 Paper

Propagation of geotags based on object duplicate detection

Peter Vajda, Ivan Ivanov, Jong-Seok Lee, Lutz Goldmann, Touradj Ebrahimi

Proceedings Volume 7798, 77980S (2010) https://doi.org/10.1117/12.863484

KEYWORDS: Visualization, Bridges, Buildings, Global Positioning System, Databases, Algorithm development, Feature extraction, Multimedia signal processing, Electrical engineering, Social networks

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Proceedings Article | 8 September 2010 Paper

Subjective evaluation of next-generation video compression algorithms: a case study

Francesca De Simone, Lutz Goldmann, Jong-Seok Lee, Touradj Ebrahimi, Vittorio Baroncini

Proceedings Volume 7798, 779811 (2010) https://doi.org/10.1117/12.863485

KEYWORDS: Video, Video coding, Standards development, Statistical analysis, Visualization, Molybdenum, Video processing, Image quality standards, Video compression, LCDs

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Proceedings Article | 8 September 2010 Paper

A compressive sensing approach to perceptual image coding

Mark Pickering, Junyong You, Touradj Ebrahimi, Andrew Perkis

Proceedings Volume 7798, 77981E (2010) https://doi.org/10.1117/12.863466

KEYWORDS: Image compression, Distortion, JPEG2000, Compressed sensing, Contrast sensitivity, Image quality, Image quality standards, Quantization, Wavelets, Eye

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Proceedings Article | 5 August 2010 Paper

Subjective evaluation of stereoscopic crosstalk perception

Liyuan Xing, Touradj Ebrahimi, Andrew Perkis

Proceedings Volume 7744, 77441V (2010) https://doi.org/10.1117/12.863365

KEYWORDS: Cameras, 3D image processing, Molybdenum, Statistical analysis, Projection systems, Silver, 3D displays, Polarization, Image quality, Eye

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Proceedings Article | 4 February 2010 Paper

A comprehensive database and subjective evaluation methodology for quality of experience in stereoscopic video

Lutz Goldmann, Francesca De Simone, Touradj Ebrahimi

Proceedings Volume 7526, 75260S (2010) https://doi.org/10.1117/12.839438

KEYWORDS: Cameras, Video, 3D image processing, Databases, 3D acquisition, Visualization, Video processing, Stereoscopic cameras, Statistical analysis, Image processing

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Proceedings Article | 2 September 2009 Paper

Subjective evaluation of JPEG XR image compression

Francesca De Simone, Lutz Goldmann, Vittorio Baroncini, Touradj Ebrahimi

Proceedings Volume 7443, 74430L (2009) https://doi.org/10.1117/12.830714

KEYWORDS: Image compression, Image quality, Picosecond phenomena, Statistical analysis, Visualization, Molybdenum, Image resolution, Standards development, Distortion, Video

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Proceedings Article | 5 May 2009 Paper

Multi-view video segmentation and tracking for video surveillance

Gelareh Mohammadi, Frederic Dufaux, Thien Ha Minh, Touradj Ebrahimi

Proceedings Volume 7351, 735104 (2009) https://doi.org/10.1117/12.820786

KEYWORDS: Cameras, Detection and tracking algorithms, Video surveillance, Video, Imaging systems, Calibration, Environmental monitoring, Surveillance, Switching, Data fusion

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Proceedings Article | 10 February 2009 Paper

SS-SSIM and MS-SSIM for digital cinema applications

Fitri Rahayu, Ulrich Reiter, Touradj Ebrahimi, Andrew Perkis, Peter Svensson

Proceedings Volume 7240, 72400P (2009) https://doi.org/10.1117/12.805805

KEYWORDS: Image quality, Molybdenum, Image processing, Visualization, Distortion, Human subjects, Projection systems, Digital imaging, Statistical modeling, Image quality standards

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Proceedings Article | 15 September 2008 Paper

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

Francesca De Simone, Daniele Ticca, Frederic Dufaux, Michael Ansorge, Touradj Ebrahimi

Proceedings Volume 7073, 70730Z (2008) https://doi.org/10.1117/12.797795

KEYWORDS: Image quality, Visualization, Image compression, Distortion, JPEG2000, RGB color model, Quality measurement, Information visualization, Visual compression, Visual system

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Proceedings Article | 13 September 2008 Paper

Error resiliency of distributed video coding in wireless video communication

Shuiming Ye, Mourad Ouaret, Frederic Dufaux, Michael Ansorge, Touradj Ebrahimi

Proceedings Volume 7073, 70730L (2008) https://doi.org/10.1117/12.796752

KEYWORDS: Error analysis, Video coding, Computer programming, Video, Automatic repeat request, Wireless communications, Video compression, Motion estimation, Cameras, Video surveillance

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Proceedings Article | 28 January 2008 Paper

Enabling privacy for distributed video coding by transform domain scrambling

Mourad Ouaret, Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 6822, 68222E (2008) https://doi.org/10.1117/12.767175

KEYWORDS: Computer programming, Distortion, Video surveillance, Video coding, Information security, Video, Error control coding, Video compression, JPEG2000, Cameras

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Proceedings Article | 24 September 2007 Paper

A comparative study of JPEG2000, AVC/H.264, and HD photo

Francesca De Simone, Mourad Ouaret, Frederic Dufaux, Andrew Tescher, Touradj Ebrahimi

Proceedings Volume 6696, 669602 (2007) https://doi.org/10.1117/12.746122

KEYWORDS: Image compression, Computer programming, Video, Video compression, Image quality, JPEG2000, Quantization, RGB color model, Spatial resolution, Distortion

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Proceedings Article | 2 May 2007 Paper

Recent advances in multiview distributed video coding

Frederic Dufaux, Mourad Ouaret, Touradj Ebrahimi

Proceedings Volume 6579, 657902 (2007) https://doi.org/10.1117/12.719535

KEYWORDS: Cameras, Video coding, Computer programming, Surveillance, Data compression, Video surveillance, Telecommunications, Target detection, Video, Motion estimation

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Proceedings Article | 29 January 2007 Paper

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

David Marimon, Yannick Maret, Yousri Abdeljaoued, Touradj Ebrahimi

Proceedings Volume 6508, 65080O (2007) https://doi.org/10.1117/12.703150

KEYWORDS: Cameras, Optical filters, Particle filters, Particles, Sensors, Imaging systems, Filtering (signal processing), Video, Electronic filtering, 3D modeling

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Proceedings Article | 29 January 2007 Paper

Feature point tracking combining the Interacting Multiple Model filter and an efficient assignment algorithm

David Marimon, Yousri Abdeljaoued, Bruno Palacios, Touradj Ebrahimi

Proceedings Volume 6508, 650808 (2007) https://doi.org/10.1117/12.702800

KEYWORDS: Detection and tracking algorithms, Filtering (signal processing), Electronic filtering, Motion models, Algorithm development, Optical tracking, Video, Feature extraction, Data modeling, Motion measurement

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Proceedings Article | 24 August 2006 Paper

Hierarchical indexing using R-trees for replica detection

Yannick Maret, David Marimón, Frédéric Dufaux, Touradj Ebrahimi

Proceedings Volume 6312, 63120I (2006) https://doi.org/10.1117/12.686956

KEYWORDS: Feature extraction, Image filtering, Digital watermarking, Image analysis, Principal component analysis, Multimedia, Visualization, Colorimetry, Photography, Computing systems

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Proceedings Article | 24 August 2006 Paper

Toward a secure JPEG

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 6312, 63120K (2006) https://doi.org/10.1117/12.686963

KEYWORDS: Computer security, Image encryption, Information security, Image registration, Image compression, Image processing, Image segmentation, Digital imaging, Image resolution, Digital watermarking

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Proceedings Article | 24 August 2006 Paper

Recent advances in MPEG-7 cameras

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 6312, 631211 (2006) https://doi.org/10.1117/12.686069

KEYWORDS: Cameras, Video surveillance, Video, Iris, Image processing, Decision support systems, Imaging systems, Manufacturing, Multimedia, Image analysis

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Proceedings Article | 24 August 2006 Paper

On comparing JPEG2000 and intraframe AVC

Mourad Ouaret, Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 6312, 63120U (2006) https://doi.org/10.1117/12.684407

KEYWORDS: JPEG2000, Computer programming, Spatial resolution, Video, Video surveillance, Image compression, Video compression, RGB color model, Video coding, Image resolution

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Proceedings Article | 2 May 2006 Paper

Privacy enabling technology for video surveillance

Frédéric Dufaux, Mourad Ouaret, Yousri Abdeljaoued, Alfonso Navarro, Fabrice Vergnenègre, Touradj Ebrahimi

Proceedings Volume 6250, 62500M (2006) https://doi.org/10.1117/12.664945

KEYWORDS: Video surveillance, Video, Surveillance, Cell phones, Information security, Video coding, Multimedia, Discrete wavelet transforms, Distortion, Internet

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Proceedings Article | 19 January 2006 Paper

Region-based transform-domain video scrambling

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 6077, 60771U (2006) https://doi.org/10.1117/12.643048

KEYWORDS: Video, Video surveillance, Computer programming, Information security, Distortion, Video coding, Discrete wavelet transforms, Image compression, Wavelets, Surveillance

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Proceedings Article | 21 September 2005 Paper

Image replica detection based on support vector classifier

Y. Maret, F. Dufaux, T. Ebrahimi

Proceedings Volume 5909, 59090I (2005) https://doi.org/10.1117/12.623823

KEYWORDS: Feature extraction, Databases, Scalable video coding, Image compression, Sensors, Digital watermarking, Image filtering, Machine learning, Photography, Error analysis

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Proceedings Article | 16 September 2005 Paper

Scrambling for anonymous visual communications

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 5909, 59090K (2005) https://doi.org/10.1117/12.623826

KEYWORDS: Video, Video surveillance, Visual communications, Skin, Computer programming, Facial recognition systems, Image compression, Video coding, Telecommunications, System identification

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Proceedings Article | 24 June 2005 Paper

Identification of image variations based on equivalence classes

Y. Maret, G. Garcia, T. Ebrahimi

Proceedings Volume 5960, 59601R (2005) https://doi.org/10.1117/12.631578

KEYWORDS: Image compression, Machine learning, Digital watermarking, Computer programming, Image filtering, Multimedia, System identification, Image analysis, Radon transform, Image enhancement

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Proceedings Article | 14 March 2005 Paper

Smart video surveillance system preserving privacy

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 5685, (2005) https://doi.org/10.1117/12.587084

KEYWORDS: Video surveillance, Video, Wavelets, Distortion, Cameras, Surveillance, Facial recognition systems, Video processing, Information security, Computer programming

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Proceedings Article | 2 November 2004 Paper

JPSEC for secure imaging in JPEG 2000

Frederic Dufaux, Susie Wee, John Apostolopoulos, Touradj Ebrahimi

Proceedings Volume 5558, (2004) https://doi.org/10.1117/12.564837

KEYWORDS: Computer security, Image resolution, Image segmentation, Wavelets, Image registration, Image encryption, Image processing, Image quality, Image compression, Information security

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Proceedings Article | 2 November 2004 Paper

Video surveillance using JPEG 2000

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 5558, (2004) https://doi.org/10.1117/12.564828

KEYWORDS: Video surveillance, Video, Cameras, Surveillance, Video processing, Facial recognition systems, Imaging systems, Network security, Image quality, Surveillance systems

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Proceedings Article | 18 January 2004 Paper

Error-resilient video coding performance analysis of motion JPEG2000 and MPEG-4

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 5308, (2004) https://doi.org/10.1117/12.526019

KEYWORDS: JPEG2000, Video, Wavelets, Video coding, Computer programming, Error analysis, Image compression, Motion analysis, Video compression, Standards development

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Proceedings Article | 19 November 2003 Paper

Securing JPEG 2000 compressed images

Frederic Dufaux, Touradj Ebrahimi

Proceedings Volume 5203, (2003) https://doi.org/10.1117/12.512554

KEYWORDS: Image compression, Image resolution, Image quality standards, Image quality, Standards development, Digital watermarking, Wavelets, Information security, Visualization, Computer programming

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Proceedings Article | 19 November 2003 Paper

Toward perceptual metrics for video watermark evaluation

Stefan Winkler, Elisa Drelie Gelasca, Touradj Ebrahimi

Proceedings Volume 5203, (2003) https://doi.org/10.1117/12.512550

KEYWORDS: Digital watermarking, Video, Visibility, Video compression, Visualization, Algorithm development, Semantic video, Discrete wavelet transforms, Visual system, Spatial frequencies

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Proceedings Article | 23 June 2003 Paper

Intuitive strategy for parameter setting in video segmentation

Elisa Drelie Gelasca, Elena Salvador, Touradj Ebrahimi

Proceedings Volume 5150, (2003) https://doi.org/10.1117/12.512830

KEYWORDS: Image segmentation, Video, Image processing algorithms and systems, Image quality, Optimization (mathematics), RGB color model, Statistical analysis, Tolerancing, Algorithm development, Video surveillance

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In this paper, we propose an original framework for an intuitive tuning of parameters in image and video segmentation algorithms. The proposed framework is very flexible and generic and does not depend on a specific segmentation algorithm, a particular evaluation metric, or a specific optimization approach, which are the three main components of its block diagram. This framework requires a manual segmentation input provided by a human operator as he/she would have performed intuitively. This input allows the framework to search for the optimal set of parameters which will provide results similar to those obtained by manual segmentation. On one hand, this allows researchers and designers to quickly and automatically find the best parameters in the segmentation algorithms they have developed. It helps them to better understand the degree of importance of each parameter's value on the final segmentation result. It also identifies the potential of the segmentation algorithm under study in terms of best possible performance level. On the other hand, users and operators of systems with segmentation components, can efficiently identify the optimal sets of parameters for different classes of images or video sequences. In a large extent, this optimization can be performed without a deep understanding of the underlying algorithm, which would facilitate the exploitations and optimizations in real applications by non-experts in segmentation. A specific implementation of the proposed framework was obtained by adopting a video segmentation algorithm invariant to shadows as segmentation component, a full reference segmentation quality metric based on a perceptually motivated spatial context, as the evaluation component, and a down-hill simplex method, as optimization component. Simulation results on various test sequences, covering a representative set of indoor and ourdoor video, show that optimal set of parameters can be obtained efficiently and largely improve the results obtained when compared to a simple implementation of the same segmentation algorithm with ad-hoc parameter setting strategy.

Proceedings Article | 23 June 2003 Paper

Object-based video: extraction tools, evaluation metrics and applications

Andrea Cavallaro, Touradj Ebrahimi

Proceedings Volume 5150, (2003) https://doi.org/10.1117/12.509853

KEYWORDS: Video, Video surveillance, Semantic video, Image segmentation, Video coding, Visualization, Multimedia, Image processing algorithms and systems, Image processing, Cameras

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Proceedings Article | 7 May 2003 Paper

Spatio-temporal shadow segmentation and tracking

Elena Salvador, Andrea Cavallaro, Touradj Ebrahimi

Proceedings Volume 5022, (2003) https://doi.org/10.1117/12.476523

KEYWORDS: Video, Detection and tracking algorithms, Video surveillance, Image segmentation, Reliability, Model-based design, Motion measurement, Video coding, 3D modeling, Statistical analysis

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Proceedings Article | 21 November 2002 Paper

Steganography for three-dimensional polygonal meshes

Nicolas Aspert, E. Drelie, Y. Maret, Touradj Ebrahimi

Proceedings Volume 4790, (2002) https://doi.org/10.1117/12.455358

KEYWORDS: 3D modeling, Optical spheres, Distortion, Steganography, Digital watermarking, Data hiding, Data modeling, Venus, Chemical species, 3D displays

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Proceedings Article | 4 January 2002 Paper

MPEG-7 description of generic video objects for scene reconstruction

Olivier Steiger, Andrea Cavallaro, Touradj Ebrahimi

Proceedings Volume 4671, (2002) https://doi.org/10.1117/12.453017

KEYWORDS: Video, Video surveillance, Visualization, Databases, Video coding, Multimedia, Cameras, Video compression, Video processing, Computer programming

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Proceedings Article | 4 January 2002 Paper

Compression of parametric surfaces for efficient 3D model coding

Diego Santa-Cruz, Touradj Ebrahimi

Proceedings Volume 4671, (2002) https://doi.org/10.1117/12.453068

KEYWORDS: 3D modeling, Quantization, Distortion, Visualization, Process modeling, Systems modeling, Binary data, 3D acquisition, 3D image processing, Visual process modeling

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Proceedings Article | 7 December 2001 Paper

Influence of a large-image watermarking scheme parallelization on possible attacks

Oscar Divorra Escoda, Rosa Figueras i Ventura, Eric Debes, Touradj Ebrahimi

Proceedings Volume 4472, (2001) https://doi.org/10.1117/12.449753

KEYWORDS: Digital watermarking, Image processing, Image quality, Fourier transforms, Filtering (signal processing), Image analysis, Image filtering, Video, Visualization, Parallel processing

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Proceedings Article | 7 December 2001 Paper

New approach to JPEG 2000 compliant region-of-interest coding

Raphael Grosbois, Diego Santa-Cruz, Touradj Ebrahimi

Proceedings Volume 4472, (2001) https://doi.org/10.1117/12.449760

KEYWORDS: Computer programming, Quantization, Distortion, Wavelets, Image quality, Image compression, Standards development, Visualization, Wavelet transforms, Image quality standards

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Proceedings Article | 7 December 2001 Paper

Authentication and access control in the JPEG 2000 compressed domain

Raphael Grosbois, Pierre Gerbelot, Touradj Ebrahimi

Proceedings Volume 4472, (2001) https://doi.org/10.1117/12.449744

KEYWORDS: Image resolution, Wavelets, Image compression, Computer programming, Image encryption, Image quality, Quantization, Distortion, Data communications, Computer security

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Proceedings Article | 1 August 2001 Paper

Watermarking scheme for large images using parallel processing

Eric Debes, Genevieve Dardier, Touradj Ebrahimi, Alexander Herrigel

Proceedings Volume 4314, (2001) https://doi.org/10.1117/12.435416

KEYWORDS: Digital watermarking, Image processing, Parallel processing, Signal processing, Signal detection, Information security, Data communications, Algorithm development, Visualization, Image resolution

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Proceedings Article | 27 April 2001 Paper

Improved linear dependence and vector model for illumination-invariant change detection

Emrullah Durucan, Touradj Ebrahimi

Proceedings Volume 4303, (2001) https://doi.org/10.1117/12.424945

KEYWORDS: Sensors, Photometry, Light sources, Surveillance, Solids, Performance modeling, Real time imaging, Light, Physics, Linear algebra

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Proceedings Article | 29 December 2000 Paper

Video object extraction based on adaptive background and statistical change detection

Andrea Cavallaro, Touradj Ebrahimi

Proceedings Volume 4310, (2000) https://doi.org/10.1117/12.411823

KEYWORDS: Video, Video surveillance, Cameras, Image segmentation, Video processing, Image processing, Detection and tracking algorithms, Machine vision, Visualization, Sensors

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Proceedings Article | 28 December 2000 Paper

JPEG 2000 still image coding versus other standards

Diego Santa-Cruz, Touradj Ebrahimi, Joel Askelof, Mathias Larsson, Charilaos Christopoulos

Proceedings Volume 4115, (2000) https://doi.org/10.1117/12.411564

KEYWORDS: Image compression, Image quality, Image quality standards, Discrete wavelet transforms, Quantization, Standards development, Signal to noise ratio, Visualization, Computer programming, Detection and tracking algorithms

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Proceedings Article | 28 December 1998 Paper

Progressive mesh-based coding of arbitrary-shaped video objects

Corinne Le Buhan Jordan, Touradj Ebrahimi, Murat Kunt

Proceedings Volume 3653, (1998) https://doi.org/10.1117/12.334626

KEYWORDS: Video, Video compression, Computer programming, Motion estimation, Motion models, Video coding, Image compression, Personal protective equipment, Image quality, Standards development

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SPIE Journal Paper | 1 July 1998 Open Access

Guest Editorial: Special Section on Image/Video Compression and Processing for Visual Communications

Yao Wang, Touradj Ebrahimi, Majid Rabbani, Ya-Qin Zhang

JEI, Vol. 7, Issue 03, (July 1998) https://doi.org/10.1117/12.10.1117/1.482602

KEYWORDS: Image compression, Video compression, Video, Video coding, Image quality, Image processing, Signal processing, Electrical engineering, Multimedia, Visual communications

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SPIE Journal Paper | 1 July 1998

MPEG-4 video verification model: A solution for interactive multimedia applications

Pascal Fleury, Sushil Bhattacharjee, Laurent Piron, Touradj Ebrahimi, Murat Kunt

JEI, Vol. 7, Issue 03, (July 1998) https://doi.org/10.1117/12.10.1117/1.482593

KEYWORDS: Video, Computer programming, Quantization, Binary data, Transparency, Video coding, Video compression, Motion estimation, Multimedia, Standards development

Proceedings Article | 16 September 1996 Paper

Image quality prediction for bit-rate allocation

Pascal Fleury, Touradj Ebrahimi

Proceedings Volume 2952, (1996) https://doi.org/10.1117/12.251268

KEYWORDS: Image compression, Image quality, Binary data, Neural networks, Quantization, Algorithm development, Data modeling, Feature extraction, Image processing, Computing systems

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Proceedings Article | 21 April 1995 Paper

Joint motion estimation and segmentation for very low bit rate video coding

Touradj Ebrahimi, Homer Chen, Barry Haskell

Proceedings Volume 2501, (1995) https://doi.org/10.1117/12.206785

KEYWORDS: Motion estimation, Video coding, Image segmentation, Image quality, Motion measurement, Video, Visualization, Low bit rate video, Computer programming, Motion detection

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SPIE Journal Paper | 1 July 1993

Motion-compensated generic coding of video based on a multiresolution data structure

Frederic Dufaux, Iole Moccagatta, Bruno Rouchouze, Touradj Ebrahimi, Murat Kunt

OE, Vol. 32, Issue 07, (July 1993) https://doi.org/10.1117/12.10.1117/12.139807

KEYWORDS: Image compression, Quantization, Video coding, Motion estimation, Wavelet transforms, Video, Wavelets, Signal to noise ratio, Video compression, Visualization

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Proceedings Article | 12 January 1993 Paper

New techniques for subband/wavelet transform coefficient coding applied to still image compression

Emmanuel Reusens, Touradj Ebrahimi

Proceedings Volume 1771, (1993) https://doi.org/10.1117/12.139090

KEYWORDS: Image compression, Quantization, Digital image processing, Distortion, Wavelet transforms, Visualization, Wavelets, Binary data, Digital filtering, Information visualization

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Proceedings Article | 1 November 1992 Paper

Image sequence coding using a three-dimensional wavelet packet and adaptive selection

Touradj Ebrahimi, Murat Kunt

Proceedings Volume 1818, (1992) https://doi.org/10.1117/12.131440

KEYWORDS: Wavelets, 3D image processing, Wavelet packet decomposition, Image compression, Image processing, Linear filtering, Visual communications, Image filtering, Computer programming, Visualization

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Proceedings Article | 1 November 1992 Paper

Interlaced image sequence coding for digital TV using adaptive quantization

Bruno Rouchouze, Touradj Ebrahimi, Frederic Dufaux, Murat Kunt

Proceedings Volume 1818, (1992) https://doi.org/10.1117/12.131381

KEYWORDS: Image compression, Quantization, Motion estimation, Image quality, Image processing, Wavelet transforms, Visual communications, Digital imaging, Optical filters, Visualization

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Proceedings Article | 1 December 1991 Paper

Coding of digital TV by motion-compensated Gabor decomposition

Frederic Dufaux, Touradj Ebrahimi, Alexander Geurtz, Murat Kunt

Proceedings Volume 1567, (1991) https://doi.org/10.1117/12.50831

KEYWORDS: Linear filtering, Digital filtering, Motion estimation, Digital image processing, Image filtering, Optical filters, Motion measurement, Image resolution, Image compression, Image processing

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Proceedings Article | 1 November 1991 Paper

Digital video codec for medium bitrate transmission

Touradj Ebrahimi, Frederic Dufaux, Iole Moccagatta, T. Campbell, Murat Kunt

Proceedings Volume 1605, (1991) https://doi.org/10.1117/12.50239

KEYWORDS: Visual communications, Quantization, Digital filtering, Image processing, Motion measurement, Motion estimation, Visualization, Video, Wavelet transforms, Image visualization

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Proceedings Article | 1 November 1991 Paper

Massively parallel implementation for real-time Gabor decomposition

Frederic Dufaux, Touradj Ebrahimi, Murat Kunt

Proceedings Volume 1606, (1991) https://doi.org/10.1117/12.50387

KEYWORDS: Image processing, Data communications, Matrix multiplication, Matrices, Image compression, Image filtering, Visual communications, Filtering (signal processing), Video, Signal processing

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SPIE Journal Paper | 1 July 1991

Image compression by Gabor expansion

Murat Kunt, Touradj Ebrahimi

OE, Vol. 30, Issue 07, (July 1991) https://doi.org/10.1117/12.10.1117/12.55898

KEYWORDS: Image compression, Transform theory, Image quality, Image transmission, Visual system, Image analysis, Data compression, Visualization, Matrices, Chemical elements

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Proceedings Article | 1 October 1990 Paper

Image sequence coding using concepts in visual perception

Todd Reed, Touradj Ebrahimi, Gaetano Giunta, Patrice Willemin, Ferran Marques, T. Campbell, Murat Kunt

Proceedings Volume 1249, (1990) https://doi.org/10.1117/12.19677

KEYWORDS: Image compression, Image filtering, Image segmentation, Visual process modeling, Visualization, Human vision and color perception, Electronic imaging, Digital imaging, Medical imaging, Image transmission

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Proceedings Article | 1 September 1990 Paper

Video coding using a pyramidal Gabor expansion

Touradj Ebrahimi, Todd Reed, Murat Kunt

Proceedings Volume 1360, (1990) https://doi.org/10.1117/12.24235

KEYWORDS: Image compression, Visual communications, Image processing, Spatial frequencies, Video coding, Image transmission, Visual system, Data compression, Data communications, Visualization

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Showing 5 of 130 publications

Proceedings Volume Editor (13)

SPIE Conference Volume | 17 October 2023

Applications of Digital Image Processing XLVI

SPIE Conference Volume | 19 October 2022

Applications of Digital Image Processing XLV

SPIE Conference Volume | 8 October 2021

Applications of Digital Image Processing XLIV

SPIE Conference Volume | 29 September 2020

Applications of Digital Image Processing XLIII

SPIE Conference Volume | 4 November 2019

Applications of Digital Image Processing XLII

Showing 5 of 13 publications

Conference Committee Involvement (66)

Applications of Digital Image Processing XLVII

19 August 2024 | San Diego, California, United States

Optics, Photonics and Digital Technologies for Imaging Applications VIII

9 April 2024 | Strasbourg, France

Applications of Digital Image Processing XLVI

21 August 2023 | San Diego, California, United States

Real-time Processing of Image, Depth and Video Information 2023

24 April 2023 | Prague, Czech Republic

Applications of Digital Image Processing XLV

22 August 2022 | San Diego, California, United States

Optics, Photonics and Digital Technologies for Imaging Applications VII

6 April 2022 | Strasbourg, France

Real-Time Image Processing and Deep Learning 2022

4 April 2022 | Orlando, Florida, United States

Applications of Digital Image Processing XLIV

1 August 2021 | San Diego, California, United States

Real-Time Image Processing and Deep Learning 2021

12 April 2021 | Online Only, Florida, United States

Applications of Digital Image Processing XLIII

24 August 2020 | Online Only, California, United States

Real-Time Image Processing and Deep Learning 2020

27 April 2020 | Online Only, California, United States

Optics, Photonics and Digital Technologies for Imaging Applications VI

6 April 2020 | Online Only, France

Applications of Digital Image Processing XLII

12 August 2019 | San Diego, California, United States

Real-Time Image Processing and Deep Learning 2019

15 April 2019 | Baltimore, MD, United States

Applications of Digital Image Processing XLI

20 August 2018 | San Diego, California, United States

Optics, Photonics and Digital Technologies for Imaging Applications

24 April 2018 | Strasbourg, France

Real-Time Image and Video Processing 2018

16 April 2018 | Orlando, FL, United States

Mobile Multimedia/Image Processing, Security, and Applications 2018

16 April 2018 | Orlando, FL, United States

Applications of Digital Image Processing XL

7 August 2017 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2017

10 April 2017 | Anaheim, CA, United States

Real-Time Image and Video Processing 2017

10 April 2017 | Anaheim, CA, United States

Applications of Digital Image Processing XXXIX

29 August 2016 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2016

18 April 2016 | Baltimore, MD, United States

Real-Time Image and Video Processing

7 April 2016 | Brussels, Belgium

Optics, Photonics and Digital Technologies for Imaging Applications

5 April 2016 | Brussels, Belgium

Applications of Digital Image Processing XXXVIII

10 August 2015 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2015

20 April 2015 | Baltimore, MD, United States

Applications of Digital Image Processing XXXVII

18 August 2014 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2014

5 May 2014 | Baltimore, MD, United States

Optics, Photonics and Digital Technologies for Multimedia Applications

16 April 2014 | Brussels, Belgium

Applications of Digital Image Processing XXXVI

26 August 2013 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2013

29 April 2013 | Baltimore, Maryland, United States

Visual Information Processing and Communication IV

6 February 2013 | Burlingame, California, United States

Applications of Digital Image Processing XXXV

13 August 2012 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2012

23 April 2012 | Baltimore, Maryland, United States

Optics, Photonics and Digital Technologies for Multimedia Applications

17 April 2012 | Brussels, Belgium

Visual Information Processing and Communication III

24 January 2012 | Burlingame, California, United States

Applications of Digital Image Processing XXXIV

22 August 2011 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2011

25 April 2011 | Orlando, Florida, United States

Visual Information Processing and Communication II

25 January 2011 | San Francisco Airport, California, United States

Applications of Digital Image Processing XXXIII

2 August 2010 | San Diego, California, United States

Optics, Photonics and Digital Technologies for Multimedia Applications

12 April 2010 | Brussels, Belgium

Mobile Multimedia/Image Processing, Security, and Applications 2010

5 April 2010 | Orlando, Florida, United States

Visual Information Processing and Communication

19 January 2010 | San Jose, California, United States

Applications of Digital Image Processing XXXII

3 August 2009 | San Diego, California, United States

Mobile Multimedia/Image Processing, Security, and Applications 2009

14 April 2009 | Orlando, Florida, United States

Visual Communications and Image Processing 2009

20 January 2009 | San Jose, California, United States

Applications of Digital Image Processing XXXI

11 August 2008 | San Diego, California, United States

Optical and Digital Image Processing

7 April 2008 | Strasbourg, France

Mobile Multimedia/Image Processing, Security, and Applications 2008

19 March 2008 | Orlando, Florida, United States

Visual Communications and Image Processing 2008

29 January 2008 | San Jose, California, United States

Applications of Digital Image Processing XXX

28 August 2007 | San Diego, California, United States

Visual Communications and Image Processing 2007

30 January 2007 | San Jose, CA, United States

Applications of Digital Image Processing XXIX

15 August 2006 | San Diego, California, United States

Visual Communications and Image Processing 2006

17 January 2006 | San Jose, California, United States

Multimedia Systems and Applications VIII

24 October 2005 | Boston, MA, United States

Applications of Digital Image Processing XXVIII

2 August 2005 | San Diego, California, United States

Image and Video Communications and Processing 2005

18 January 2005 | San Jose, California, United States

Multimedia Systems and Applications VII

25 October 2004 | Philadelphia, Pennsylvania, United States

Applications of Digital Image Processing XXVII

2 August 2004 | Denver, Colorado, United States

Visual Communications and Image Processing 2004

20 January 2004 | San Jose, California, United States

Multimedia Systems and Applications VI

8 September 2003 | Orlando, Florida, United States

Applications of Digital Image Processing XXVI

5 August 2003 | San Diego, California, United States

Visual Communications and Image Processing 2003

8 July 2003 | Lugano, Switzerland

Visual Communications and Image Processing 2003

8 July 2003 | Lugano, Switzerland

Image and Video Communications and Processing 2003

21 January 2003 | Santa Clara, CA, United States

Showing 5 of 66 Conference Committees

Course Instructor

SC766: Information Processing for Video Surveillance

The purpose of this short course is to give a broad view of the many aspects of video surveillance. In particular, we will review the state-of-the-art in video surveillance as well as discuss the latest developments and future trends. From a technical point of view, the short course will address several important areas which are relevant in a video surveillance system, including video analysis, video coding, security, transmission and video database management. Besides the technical aspects, the short course will also address societal issues and legal aspects.

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