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System gamma as a function of image- and monitor-dynamic range

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dc.contributor.author Kane, David
dc.contributor.author Bertalmío, Marcelo
dc.date.accessioned 2016-06-06T08:39:56Z
dc.date.available 2016-06-06T08:39:56Z
dc.date.issued 2016
dc.identifier.citation Kane D, Bertalmío M. System gamma as a function of image- and monitor-dynamic range. Journal of Vision. 2016;16(6):4,1-13. doi:10.1167/16.6.4
dc.identifier.issn 1534-7362
dc.identifier.uri http://hdl.handle.net/10230/26850
dc.description.abstract System gamma is the end-to-end exponent that describes the relationship between the relative luminance values at capture and the reproduced image. The system gamma preferred by subjects is known to vary with the background luminance condition and the image in question. We confirm the previous two findings using an image database with both high and low dynamic range images (from 102 to 107), but also find that the preferred system gamma varies with the dynamic range of the monitor (CRT, LCD, or OLED). We find that the preferred system gamma can be predicted in all conditions and for all images by a simple model that searches for the value that best flattens the lightness distribution, where lightness is modeled as a power law of onscreen luminance. To account for the data, the exponent must vary with the viewing conditions. The method presented allows the inference of lightness perception in natural scenes without direct measurement and makes testable predictions for how lightness perception varies with the viewing condition and the distribution of luminance values in a scene. The data from this paper has been made available online.
dc.description.sponsorship This work was supported by the European Research Council, Starting (Grant ref. 306337), the Spanish government (grant ref. TIN2015-71537-P), and by the Icrea Academia Award.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Association for Research in Vision and Ophthalmology (ARVO)
dc.relation.ispartof Journal of Vision. 2016;16(6):4,1-13.
dc.rights This work is licensed under a Creative Commons Attribution 4.0 International License.
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.title System gamma as a function of image- and monitor-dynamic range
dc.type info:eu-repo/semantics/article
dc.identifier.doi http://dx.doi.org/10.1167/16.6.4
dc.subject.keyword System gamma
dc.subject.keyword Image quality
dc.subject.keyword Natural scenes
dc.subject.keyword Tone-mapping operators
dc.subject.keyword High dynamic range
dc.subject.keyword Low dynamic range
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/306337
dc.relation.projectID info:eu-repo/grantAgreement/ES/1PE/TIN2015-71537-P
dc.rights.accessRights info:eu-repo/semantics/openAccess
dc.type.version info:eu-repo/semantics/publishedVersion

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