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Title:	An analysis of visual adaptation and contrast perception for tone mapping
Author:	Ferradans Ramonde, Sira; Bertalmío, Marcelo; Provenzi, Edoardo; Caselles, Vicente
Other authors:	Universitat Pompeu Fabra
Abstract:	Tone Mapping is the problem of compressing the range of a High-Dynamic Range image so that it can be displayed in a Low-Dynamic Range screen, without losing or introducing novel details: The final image should produce in the observer a sensation as close as possible to the perception produced by the real-world scene. We propose a tone mapping operator with two stages. The first stage is a global method that implements visual adaptation, based on experiments on human perception, in particular we point out the importance of cone saturation. The second stage performs local contrast enhancement, based on a variational model inspired by color vision phenomenology. We evaluate this method with a metric validated by psychophysical experiments and, in terms of this metric, our method compares very well with the state of the art.
Subject(s):	-Imatges -- Processament -- Tècniques digitals -Dades Compressió (Informàtica) -Fotografia digital -High-dynamic range images -Tone mapping -Naka-Rushton equation -Weber-Fechner contrast -Photoreceptors -Retina -Cone saturation
Rights:	© 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works./nThe final published article can be found at http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5728823
Document type:	Article Article - Accepted version
Published by:	Institute of Electrical and Electronics Engineers (IEEE)
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