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Le traitement du signal chromatique dans la rétine : Un modèle de base pour la perception humaine des couleurs.

Abstract : The knowledge of principles and mechanisms of color human perception makes possible to implement techniques of industrial reproduction and processing of color. In the case of the equivalence of colors the studies of human perception played a significant role and made it possible to establish standards by the CIE. But the appearance of colors under unspecified conditions of observation remains uncontrolled.
In this study, we propose models of color perception based on the biology of the retina. These models concern the sampling of color by the cones of the retina, non-linearities of processing of the chromatic signal and the spatial and temporal processing of the chromatic signal by the layers of neurones in the retina. These models make it possible to understand the coding of color in opposition of colors, the formation of the thresholds of color discimination and the properties of spatial and temporal filtering of color signal within the retina. These elements make the retina an efficient and robust sensor for the analysis of natural images.
The results of this study allow us to consider the realization of analog circuits copying the characteristics of processing of the retina because our models can be directly translated into electric circuits. They also allow the definition of an adaptive colorimetry, taking into account the phenomena of adaptation under the photopic conditions of vision. Finally they provide a
method for the analysis of vector images, for which a vector of characteristics is defined at each pixel.
Mots-clés : couleur vision modèle
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Submitted on : Wednesday, January 16, 2008 - 11:38:56 AM
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  • HAL Id : tel-00204901, version 1

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David Alleysson. Le traitement du signal chromatique dans la rétine : Un modèle de base pour la perception humaine des couleurs.. Traitement du signal et de l'image [eess.SP]. Université Joseph-Fourier - Grenoble I, 1999. Français. ⟨tel-00204901⟩

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