A nonlocal variational formulation for the improvement of tone mapped images
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- dc.contributor.author Cyriac, Praveenca
- dc.contributor.author Batard, Thomasca
- dc.contributor.author Bertalmío, Marceloca
- dc.date.accessioned 2016-06-10T08:50:35Z
- dc.date.available 2016-06-10T08:50:35Z
- dc.date.issued 2014ca
- dc.description.abstract 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. Because there is no ground truth to compare with, evaluation of a tone mapped image has to be done by comparing with the original high dynamic range image. As standard metrics based on pixel-wise comparisons are not suitable for comparing images of different dynamic range, non local perceptual based metrics are commonly used. We propose a general method for optimizing tone mapped images with respect to a given non local metric. In particular, if the metric is perceptual, i.e. it involves perceptual concepts, we provide an adequate minimization strategy. Experiments on a particular perceptual metric tested with different tone mapped images provided by several tone mapping operators validate our approach.
- dc.description.sponsorship This work was supported by European Research Council, Starting Grant ref. 306337, and by Spanish grants ref. TIN2011-15954-E and ref. TIN2012-38112.
- dc.format.mimetype application/pdfca
- dc.identifier.citation Cyriac P, Batard T, Bertalmío M. A nonlocal variational formulation for the improvement of tone mapped images. SIAM J Imaging Sci. 2014;7(4):2340-63. DOI: 10.1137/140967209ca
- dc.identifier.doi http://dx.doi.org/10.1137/140967209
- dc.identifier.issn 1936-4954ca
- dc.identifier.uri http://hdl.handle.net/10230/26898
- dc.language.iso engca
- dc.publisher SIAM (Society for Industrial and Applied Mathematics)ca
- dc.relation.ispartof SIAM Journal on Imaging Sciences. 2014;7(4):2340-63
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/306337ca
- dc.relation.projectID info:eu-repo/grantAgreement/ES/3PN/TIN2011-15954-E
- dc.rights © Society for Industrial and Applied Mathematicsca
- dc.rights.accessRights info:eu-repo/semantics/openAccessca
- dc.subject.keyword Tone mapping
- dc.subject.keyword Non local variational problem
- dc.subject.keyword Perceptual distance
- dc.subject.keyword Just noticeable difference
- dc.title A nonlocal variational formulation for the improvement of tone mapped imagesca
- dc.type info:eu-repo/semantics/articleca
- dc.type.version info:eu-repo/semantics/acceptedVersionca