Amélioration de la qualité visuelle d’images couleur dans le cadre du standard de compression JPEG2000

Amélioration de la qualité visuelle d’images couleur dans le cadre du standard de compression JPEG2000

Visual quality enhancement for color images in the framework of the JPEG2000 compression standard

Adrian Stoica Mohamed-Chaker Larabi  Christine Fernandez-Maloigne 

Laboratoire SIC – CNRS FRE 2731 – Université de Poitiers, Bat. SP2MI, Téléport 2, BP 30179 – 86962 FUTUROSCOPE Cedex – FRANCE

15 June 2004
31 October 2004
| Citation



In the last years, the consideration of different models of the Human Visual System (HVS) in the final perceived quality of the compressed images becomes a major research subject. Therefore, it is natural to take advantage of the recent knowledge on both perception and models of the human vision in an image compression system. Thus, in this paper we propose an integration method of that knowledge for the improvement of perceptual JPEG2000 image compression quality. This method consists on two parts: a laboratory evaluation of the HVS model by the Contrast Sensitivity Function (CSF), and an implementation technique of visual weightings for the JPEG2000 scheme, using the evaluated HVS model in the Fourier domain of the color image.


Durant les dernières années, la prise en compte de modèles du Système Visuel Humain (SVH) dans l'évaluation de la qualité visuelle des images couleur compressées, est devenu un sujet de recherche majeur. Il semble naturel d'intégrer davantage les connaissances récentes sur la perception et la modélisation de la vision humaine, dans les systèmes de compression d'images. Ainsi, dans cet article, nous proposons une méthode d'intégration de ces connaissances pour l'augmentation de la qualité visuelle d'images compressées JPEG2000. Cette méthode consiste en deux parties: une évaluation de laboratoire pour la modélisation du SVH par la Fonction de Sensibilité au Contraste (CSF) et une technique de calcul de facteurs de pondération visuelle pour la compression JPEG2000, utilisant le modèle SVH évalué, dans le domaine de Fourier de l'image couleur.


Color image, color image quality, human visual system, contrast sensitivity function, JPEG2000 image compression, visual weightings

Mots clés

Images couleur, qualité d'images couleur, système visuel humain, fonction de sensibilité au contraste, compression JPEG2000, facteurs de pondération visuelle

1. Introduction
2. Aperçu De JPEG2000
3. Modélisation Du Système Visuel Humain
4. Intégration Du SVH Dans La Compression JPEG2000
5. Résultats Et Discussions
6. Conclusions

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