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Pré-Publication, Document De Travail Année : 2014

A Non local Variational Formulation for the Optimization of Tone Mapping Operators

Résumé

Due to technical limitations, common display devices can only reproduce images having a low range of intensity values (dynamic range). As a consequence, the dynamic range of images encoding real world scenes, which is large, has to be compressed in order for them to be reproduced on a common display, and this technique is called tone mapping. A good tone mapping operator should make the image on the screen be perceived as the original scene, but the main issue is that the quality of a tone mapping operator may vary greatly depending on the image attributes considered, and this might influence the way to design the tone mapping operator. In this paper, we address this issue by showing that, for a large class of metrics comparing perceptual attributes between images, it is possible to improve any tone mapping operator with respect to these metrics. The key idea of our approach is first to consider a given metric as a non local operator, then to formulate the problem of making the output image perceptually closer to the real world scene with respect to this metric as a minimization problem. Experiments on a particular metric tested with different tone mapping operators and images validate our approach.
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Dates et versions

hal-00986918 , version 1 (05-05-2014)
hal-00986918 , version 2 (09-09-2014)

Identifiants

  • HAL Id : hal-00986918 , version 1

Citer

Praveen Cyriac, Thomas Batard, Marcelo Bertalmío. A Non local Variational Formulation for the Optimization of Tone Mapping Operators. 2014. ⟨hal-00986918v1⟩
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