The influence of lightness, and the crispening effect on the perceived contrast of textured images

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• dc.contributor.author Kane, Davidca
• dc.contributor.author Bertalmío, Marceloca
• dc.date.accessioned 2017-03-13T08:15:30Z
• dc.date.available 2017-03-13T08:15:30Z
• dc.date.issued 2016
• dc.description Comunicació presentada al IS&T International Symposium on Electronic Imaging, celebrat del 14 al 18 de febrer de 2016 a San Francisco (CA, USA) i organitzat per la Society for Imaging Science and Technology.
• dc.description.abstract We investigate the role of lightness perception in determining the perceived contrast of images. In particular, it is known that the background luminance of a display affects the relationship between onscreen luminance and perceived lightness. Stevens & Stevens (1963) modeled this effect using a simple power law. However, Whittle (1992) observed a more local effect, whereby subjects are more sensitive to lightness variations around the background luminance (the crispening effect). We probe lightness perception by asking subjects to manipulate the contrast of small patches on a uniform background until they appear to vary, from black to white, in a perceptually linear manner. In a second experiment, we estimate the contrast required to match the contrast of a light patch to that of a dark patch. Both experiments are conducted using five background luminance conditions, from 0 to 100% luminance. We find that subjects contrast judgments can only be modeled by first estimating the perceived lightness in a scene, using the empirically estimated lightness functions, before computing contrast. We conclude that models of contrast perception must include sophisticated models of lightness perception.
• dc.format.mimetype application/pdfca
• dc.identifier.citation Kane D, Bertalmío M. The influence of lightness, and the crispening effect on the perceived contrast of textured images. In: IS&T International Symposium on Electronic Imaging Science and Technology; 2016 Febr. 14-18; San Francisco (CA, USA). Springfield: IS&T; 2016. Image Quality and System Performance XIII, p. IQSP-220.1 [5 p.]. DOI: 10.2352/ISSN.2470-1173.2016.13.IQSP-220
• dc.identifier.doi http://dx.doi.org/10.2352/ISSN.2470-1173.2016.13.IQSP-220
• dc.identifier.issn 1062-3701
• dc.identifier.uri http://hdl.handle.net/10230/28212
• dc.language.iso eng
• dc.publisher The Society for Imaging Science and Technology (IS&T)ca
• dc.relation.ispartof IS&T International Symposium on Electronic Imaging Science and Technology; 2016 Febr. 14-18; San Francisco (CA, USA). Springfield: IS&T; 2016. Image Quality and System Performance XIII, p. IQSP-220.1 [5 p.].
• dc.rights © 2016 Society for Imaging Science and Technology. Reprinted with permission of IS&T: The Society for Imaging Science and Technology sole copyright owners of Electronic Imaging, Image Quality and System Performance XIII.
• dc.rights.accessRights info:eu-repo/semantics/openAccess
• dc.subject.other Imatges -- Processament
• dc.subject.other Comunicació visual
• dc.title The influence of lightness, and the crispening effect on the perceived contrast of textured imagesca
• dc.type info:eu-repo/semantics/conferenceObject
• dc.type.version info:eu-repo/semantics/acceptedVersion