Dr. Mohamed-Chaker Larabi Profile

Dr. Mohamed-Chaker Larabi

Lecturer at Univ of Poitiers

SPIE Involvement:

Editorial Board Member: Journal of Electronic Imaging | Author | Editor

Publications (34)

SPIE Journal Paper | 2 January 2017 Open Access

Open Access

Special Section Guest Editorial:Perceptually Driven Visual Information Analysis

Mohamed-Chaker Larabi, Sanghoon Lee, Mohammed El Hassouni, Frédéric Morain-Nicolier, Rachid Jennane

JEI, Vol. 25, Issue 06, 061601, (January 2017) https://doi.org/10.1117/12.10.1117/1.JEI.25.6.061601

KEYWORDS: Visualization, Information visualization, Visual analytics, Visual process modeling, Image quality, Image segmentation, Image processing, 3D modeling, Video, Detection and tracking algorithms

Proceedings Article | 8 February 2015 Paper

Paper

The effects of scene content, compression, and frame rate on the performance of analytics systems

A. Tsifouti, S. Triantaphillidou, M. C. Larabi, G. Doré, Efthimia Bilissi, A. Psarrou

Proceedings Volume 9396, 93960X (2015) https://doi.org/10.1117/12.2083426

KEYWORDS: Video, Analytics, Cameras, Image quality, Visualization, Video surveillance, Imaging systems, Image quality standards, Switches, Systems modeling

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Proceedings Article | 8 February 2015 Paper

Paper

Comparative performance between human and automated face recognition systems, using CCTV imagery, different compression levels, and scene parameters

A. Tsifouti, S. Triantaphillidou, M.-C. Larabi, Efthimia Bilissi, A. Psarrou

Proceedings Volume 9396, 93960M (2015) https://doi.org/10.1117/12.2083325

KEYWORDS: Data modeling, Facial recognition systems, Systems modeling, Cameras, Principal component analysis, Image quality, Imaging systems, Image compression, Complex systems, Video coding

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SPIE Journal Paper | 24 December 2014 Open Access

Open Access

Special Section Guest Editorial: Image/Video Quality and System Performance

Mohamed-Chaker Larabi, Sophie Triantaphillidou, Andrew Watson

JEI, Vol. 23, Issue 06, 061101, (December 2014) https://doi.org/10.1117/12.10.1117/1.JEI.23.6.061101

KEYWORDS: Image quality, Visualization, Video, Video coding, Quality systems, Imaging systems, Image compression, 3D image processing, Systems modeling, Visual process modeling

Proceedings Article | 17 March 2014 Paper

Paper

Multimodal video quality assessment for talking face analysis

Naty Ould Sidaty, Mohamed-Chaker Larabi, Abdelhakim Saadane

Proceedings Volume 9016, 90160M (2014) https://doi.org/10.1117/12.2042482

KEYWORDS: Video, Molybdenum, Databases, Video surveillance, Multimedia, Head, Eye, Visualization, Video compression, Statistical analysis

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Proceedings Article | 6 March 2014 Paper

Paper

On the comparison of visual discomfort generated by S3D and 2D content based on eye-tracking features

Iana Iatsun, Mohamed-Chaker Larabi, Christine Fernandez

Proceedings Volume 9011, 901124 (2014) https://doi.org/10.1117/12.2042481

KEYWORDS: Visualization, Video, Visual analytics, Statistical analysis, Eye, Retina, Head, Brain, Neodymium, Visual system

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Proceedings Article | 3 February 2014 Paper

Paper

On the definition of adapted audio/video profiles for high-quality video calling services over LTE/4G

Maty Ndiaye, Catherine Quinquis, Mohamed Chaker Larabi, Gwenael Le Lay, Hakim Saadane, Clency Perrine

Proceedings Volume 9016, 90160J (2014) https://doi.org/10.1117/12.2039291

KEYWORDS: Video, Molybdenum, Computer programming, Computing systems, Standards development, Video compression, Tablets, Transform theory, Video coding, Multimedia

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Proceedings Article | 12 March 2013 Paper

Paper

Investigation of visual fatigue/discomfort generated by S3D video using eye-tracking data

Iana Iatsun, Mohamed-Chaker Larabi, Christine Fernandez-Maloigne

Proceedings Volume 8648, 864803 (2013) https://doi.org/10.1117/12.2008206

KEYWORDS: Visualization, Video, Eye, Statistical analysis, Visual analytics, Head, Manufacturing, Visual system, Positron emission tomography, Brain

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Proceedings Article | 4 February 2013 Paper

Paper

Acceptable bit-rates for human face identification from CCTV imagery

Anastasia Tsifouti, Sophie Triantaphillidou, Efthimia Bilissi, Mohamed-Chaker Larabi

Proceedings Volume 8653, 865305 (2013) https://doi.org/10.1117/12.2004140

KEYWORDS: Cameras, Video, Video compression, Image compression, Image quality, Computer programming, Image quality standards, Facial recognition systems, Skin, Surveillance

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SPIE Journal Paper | 22 March 2012

Efficient bit allocation using new intra and inter-frame modeling for H.264/AVC

Miryem Hrarti, Abdelhakim Saadane, Mohamed-Chaker Larabi, Driss Aboutajdine, Ahmed Tamtaoui

JEI, Vol. 21, Issue 1, 013013, (March 2012) https://doi.org/10.1117/12.10.1117/1.JEI.21.1.013013

KEYWORDS: Detection and tracking algorithms, Video, Motion models, Quantization, Francium, Computer programming, Motion measurement, Performance modeling, Video coding, Databases

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Proceedings Article | 21 February 2012 Paper

Paper

A statistical study of the correlation between interest points and gaze points

Michael Nauge, Mohamed-Chaker Larabi, Christine Fernandez-Maloigne

Proceedings Volume 8291, 829111 (2012) https://doi.org/10.1117/12.912089

KEYWORDS: Sensors, Databases, Image quality, Eye, Image filtering, Corner detection, Quality measurement, Opacity, Object recognition, Visualization

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Proceedings Article | 25 January 2012 Paper

Paper

A perceptual optimization of H.264/AVC bit allocation at the frame and macroblock levels

M. Hrarti, H. Saadane, M.-C. Larabi, A. Tamtaoui, D. Aboutajdine

Proceedings Volume 8293, 82930V (2012) https://doi.org/10.1117/12.908394

KEYWORDS: Visualization, Video, Quantization, Detection and tracking algorithms, Francium, Video compression, Computer programming, Distortion, Motion measurement, Visual process modeling

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In H.264/AVC rate control algorithm, the bit allocation process and the QP determination are not optimal. At frame layer, there is an implicit assumption considering that the video sequence is more or less stationary and consequently the neighbouring frames have similar characteristics. So, the target Bit-Rate for each frame is estimated using a straightforward process that allocates an equal bit budget for each frame regardless of its temporal and spatial complexities. This uniform allocation is surely not suited especially for all types of video sequences. The target bits determination at macroblock layer uses the MAD (Mean Absolute Difference) ratio as a complexity measure in order to promote interesting macroblocks, but this measure remains inefficient in handling macroblock characteristics. In a previous work we have proposed Rate-Quantization (R-Q) models for Intra and Inter frames used to deal with the QP determination shortcoming. In this paper, we look to overcome the limitation of the bit allocation process at the frame and the macroblock layers. At the frame level, we enhance the bit allocation process by exploiting frame complexity measures. Thereby, the target bit determination for P-frames is adjusted by combining two temporal measures: The first one is a motion ratio determined from actual bits used to encode previous frames. The second measure exploits both the difference between two consecutive frames and the histogram of this difference. At macroblock level, the visual saliency is used in the bit allocation process. The basic idea is to promote salient macroblocks. Hence, a saliency map, based on a Bottom-Up approach, is generated and a macroblock classification is performed. This classification is then used to accurately adjust UBits_H264 which represents the usual bit budget estimated by H.264/AVC bit allocation process. For salient macroblocks the adjustment leads to a bit budget which is always larger than UBits_H264. The extra bits added to code these macroblocks are deducted from the bit budget allocated to the non-salient macroblocks. Simulations have been carried out using JM15.0 reference software, several video sequences and different target Bit-Rates. In comparison with JM15.0 algorithm, the proposed approach improves the coding efficiency in terms of PSNR/PSNR-HVS (up to +2dB/+3dB). Furthermore, the bandwidth constraint is always satisfied because the actual Bit-Rate is always lower than or equal to the target Bit-Rate.

Proceedings Article | 25 January 2012 Paper

Paper

Towards a perceptual quality metric for computer-generated images

Pierre Boulenguez, Boris Airieau, Mohamed-Chaker Larabi, Daniel Meneveaux

Proceedings Volume 8293, 82930K (2012) https://doi.org/10.1117/12.908067

KEYWORDS: Cesium, Calcium, Phase modulation, Adaptive optics, Picosecond phenomena, Light sources and illumination, Photons, Computer graphics, Molybdenum, Data modeling

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Proceedings Article | 24 January 2011 Paper

Paper

Evaluation of a hyperspectral image database for demosaicking purposes

Mohamed-Chaker Larabi, Sabine Süsstrunk

Proceedings Volume 7876, 78760C (2011) https://doi.org/10.1117/12.876764

KEYWORDS: Cameras, Hyperspectral imaging, RGB color model, Oxygen, Device simulation, Databases, Optical filters, Image filtering, Digital cameras, Image processing

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Proceedings Article | 24 January 2011 Paper

Paper

A JPEG-like algorithm for compression of single-sensor camera image

Omar Benahmed Daho, Mohamed-Chaker Larabi, Jayanta Mukhopadhyay

Proceedings Volume 7876, 787610 (2011) https://doi.org/10.1117/12.872416

KEYWORDS: Image compression, RGB color model, Image processing, Cameras, Optical filters, Image quality, Sensors, Image filtering, Computer programming, Digital imaging

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Proceedings Article | 24 January 2011 Paper

Paper

Improving the quality of H.264/AVC by using a new rate-quantization model

M. Hrarti, H. Saadane, M.-C. Larabi, A. Tamtaoui, D. Aboutajdine

Proceedings Volume 7867, 78670J (2011) https://doi.org/10.1117/12.872426

KEYWORDS: Quantization, Video, Video coding, Computer programming, Visual process modeling, Motion models, Bridges, Data modeling, Detection and tracking algorithms, Image quality standards

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Proceedings Article | 24 January 2011 Paper

Paper

ImQual: a web-service dedicated to image quality evaluation and metrics benchmark

Michael Nauge, Mohamed-Chaker Larabi, Christine Fernandez-Maloigne

Proceedings Volume 7867, 786714 (2011) https://doi.org/10.1117/12.876654

KEYWORDS: Image quality, Databases, Image compression, Distortion, Visualization, Video, Image processing, Image quality standards, Performance modeling, Signal to noise ratio

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Proceedings Article | 24 January 2011 Paper

Paper

Monitoring image quality for security applications

Mohamed-Chaker Larabi, Didier Nicholson

Proceedings Volume 7867, 78670V (2011) https://doi.org/10.1117/12.876551

KEYWORDS: Image quality, Video surveillance, Video, Video compression, Surveillance, Image quality standards, Image compression, Databases, Forensic science, Cameras

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Proceedings Article | 18 January 2010 Paper

Paper

Comparison of subjective assessment protocols for digital cinema applications

M.-C. Larabi

Proceedings Volume 7529, 752902 (2010) https://doi.org/10.1117/12.839177

KEYWORDS: Image quality, Molybdenum, Image processing, Image compression, Sensors, Printing, Manufacturing, Image transmission, Visualization, Image quality standards

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Proceedings Article | 18 February 2009 Paper

Paper

A wavelet-based quadtree driven stereo image coding

Rafik Bensalma, Mohamed-Chaker Larabi

Proceedings Volume 7237, 72371Z (2009) https://doi.org/10.1117/12.807253

KEYWORDS: Image compression, Image quality, Image segmentation, Wavelets, Wavelet transforms, Visual system, Image processing algorithms and systems, Image processing, Visualization, Discrete wavelet transforms

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Proceedings Article | 11 February 2009 Paper

Paper

HVS-based quantization steps for validation of digital cinema extended bitrates

M.-C. Larabi, P. Pellegrin, G. Anciaux, F.-O. Devaux, O. Tulet, B. Macq, C. Fernandez

Proceedings Volume 7240, 72400V (2009) https://doi.org/10.1117/12.807348

KEYWORDS: Quantization, Visualization, JPEG2000, Wavelets, Image compression, Image quality standards, Image processing, Eye, Visual compression, Image quality

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Proceedings Article | 15 September 2008 Paper

Paper

Toward objective image quality metrics: the AIC Eval Program of the JPEG

Thomas Richter, Chaker Larabi

Proceedings Volume 7073, 70730X (2008) https://doi.org/10.1117/12.795096

KEYWORDS: Visualization, JPEG2000, Image compression, Image quality, Molybdenum, RGB color model, Calibration, Visibility, Quantization, Video

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Proceedings Article | 29 February 2008 Paper

Paper

Toward a stereoscopic encoder/decoder for digital cinema

Rafik Bensalma, Mohamed-Chaker Larabi

Proceedings Volume 6803, 68031Q (2008) https://doi.org/10.1117/12.766595

KEYWORDS: Image compression, Image quality, Image transmission, JPEG2000, Detection and tracking algorithms, Binary data, Image processing, Machine vision, Computer vision technology, Cameras

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Proceedings Article | 28 January 2008 Paper

Paper

Relation between bitrate, motion and framerate for scoring of image sequences

Mohamed-Chaker Larabi, Louise Quoirin

Proceedings Volume 6808, 680815 (2008) https://doi.org/10.1117/12.766659

KEYWORDS: Molybdenum, Image quality, Video, Image processing, Motion measurement, Image compression, Motion models, Ranging, Image quality standards, Multimedia

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Proceedings Article | 28 January 2008 Paper

Paper

Toward an efficient objective metric based on perceptual criteria

Ludovic Quintard, Mohamed-Chaker Larabi, Christine Fernandez-Maloigne

Proceedings Volume 6808, 68080T (2008) https://doi.org/10.1117/12.765481

KEYWORDS: Image quality, Image processing, LCDs, Visual system, Retina, Cones, Visualization, Visual optics, Image filtering, Color reproduction

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Proceedings Article | 28 January 2008 Paper

Paper

Perceptual color difference metric including a CSF based on the perception threshold

Vincent Rosselli, Mohamed-Chaker Larabi, Christine Fernandez-Maloigne

Proceedings Volume 6808, 68080I (2008) https://doi.org/10.1117/12.766623

KEYWORDS: Color difference, Colorimetry, Systems modeling, Image filtering, Visual system, Contrast sensitivity, Visualization, RGB color model, Spatial frequencies, Image processing

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Proceedings Article | 28 January 2008 Paper

Paper

Quality assessment of color reproduction devices: cross-media vs. single media

Ludovic Quintard, Mohamed-Chaker Larabi, Christine Fernandez-Maloigne

Proceedings Volume 6807, 68070D (2008) https://doi.org/10.1117/12.765474

KEYWORDS: Color reproduction, Visualization, Statistical analysis, Image quality, LCDs, Information visualization, Calibration, Image visualization, Medical diagnostics, Manufacturing

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Proceedings Article | 29 May 2007 Paper

Paper

Quality assessment for color reproduction using a blind metric

B. Bringier, L. Quintard, M-C. Larabi

Proceedings Volume 6356, 635611 (2007) https://doi.org/10.1117/12.736922

KEYWORDS: Image quality, LCDs, Color reproduction, Quality measurement, CRTs, Image filtering, Image processing, Databases, Systems modeling, Distortion

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SPIE Journal Paper | 1 April 2006

Adaptive color quantization using the "baker's transformation"

Christophe Montagne, Sylvie Lelandais, André Smolarz, Philippe Cornu, Chaker Larabi, Christine Fernandez-Maloigne

JEI, Vol. 15, Issue 02, 023015, (April 2006) https://doi.org/10.1117/12.10.1117/1.2199854

KEYWORDS: Quantization, RGB color model, Visualization, Image quality, Image compression, Image processing, Molybdenum, Dynamical systems, Image retrieval, 3D image processing

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Proceedings Article | 19 November 2003 Paper

Paper

Psychophysical evaluations for both color image compression and watermarking

Christine Fernandez-Maloigne, Mohamed-Chaker Larabi, Philippe Carre, Alice Parisis, Adrian Stoica

Proceedings Volume 5203, (2003) https://doi.org/10.1117/12.512549

KEYWORDS: Digital watermarking, Image compression, Digital image processing, Image quality, Visual system

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Proceedings Article | 1 May 2003 Paper

Paper

Using a CBIR scheme based on expert knowledge for a computer-aided classification of ornamental stones

Mohamed-Chaker Larabi, Noel Richard, Olivier Colot, C. Fernandez

Proceedings Volume 5132, (2003) https://doi.org/10.1117/12.514960

KEYWORDS: Databases, Feature extraction, Image retrieval, Matrices, RGB color model, Quantization, Visualization, Image classification, Content based image retrieval, Image fusion

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Proceedings Article | 20 December 2001 Paper

Paper

Using combination of color, texture, and shape features for image retrieval in melanomas databases

Mohamed-Chaker Larabi, Noel Richard, Christine Fernandez-Maloigne

Proceedings Volume 4672, (2001) https://doi.org/10.1117/12.452668

KEYWORDS: Databases, Melanoma, Skin cancer, Image segmentation, Image retrieval, Skin, Feature extraction, Distance measurement, Image processing, Fuzzy logic

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Proceedings Article | 20 December 2001 Paper

Paper

Semi-automatic feedback using concurrence between mixture vectors for general databases

Mohamed-Chaker Larabi, Noel Richard, Olivier Colot, Christine Fernandez-Maloigne

Proceedings Volume 4672, (2001) https://doi.org/10.1117/12.452690

KEYWORDS: Databases, Image retrieval, Image processing, Visualization, Distance measurement, Systems modeling, Feature extraction, Current controlled voltage source, Switches, Image classification

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Proceedings Article | 19 December 2001 Paper

Paper

Object-oriented query based on belief fusion: application to dermatological databases

Mohamed-Chaker Larabi, Noel Richard, Olivier Colot, Christine Fernandez-Maloigne

Proceedings Volume 4676, (2001) https://doi.org/10.1117/12.451081

KEYWORDS: Melanoma, Databases, Skin cancer, Computer aided diagnosis and therapy, Biopsy, Skin, Computing systems, Feature extraction, Data modeling, Diagnostics

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Showing 5 of 34 publications

Proceedings Volume Editor (2)

SPIE Conference Volume | 8 January 2015

Image Quality and System Performance XII

SPIE Conference Volume | 7 January 2014

Image Quality and System Performance XI

Conference Committee Involvement (5)

Image Quality and System Performance XII

10 February 2015 | San Francisco, California, United States

Image Quality and System Performance XI

3 February 2014 | San Francisco, California, United States

Image Quality and System Performance X

5 February 2013 | Burlingame, California, United States

Image Quality and System Performance IX

24 January 2012 | Burlingame, California, United States

Image Quality and System Performance VIII

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

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