Image-based Remapping of Material Appearance

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dc.contributor.authorSztrajman, Alejandroen_US
dc.contributor.authorKrivánek, Jaroslaven_US
dc.contributor.authorWilkie, Alexanderen_US
dc.contributor.authorWeyrich, Timen_US
dc.contributor.editorReinhard Klein and Holly Rushmeieren_US
dc.date.accessioned2017-09-21T07:15:04Z
dc.date.available2017-09-21T07:15:04Z
dc.date.issued2017
dc.description.abstractDigital 3D content creation requires the ability to exchange assets across multiple software applications. For many 3D asset types, standard formats and interchange conventions are available. For material definitions, however, inter-application exchange is still hampered by different software packages supporting different BRDF models. To make matters worse, even if nominally identical BRDF models are supported, these often differ in their implementation, due to optimisations and safeguards in individual renderers. To facilitate appearance-preserving translation between different BRDF models whose precise implementation is not known (arguably the standard case with commercial systems), we propose a robust translation scheme which leaves BRDF evaluation to the targeted rendering system, and which expresses BRDF similarity in image space. As we will show, even naïve applications of a nonlinear fit which uses such an image space residual metric work well in some cases; however, it does suffer from instabilities for certain material parameters. We propose strategies to mitigate these instabilities and perform reliable parameter remappings between differing BRDF definitions. We report on experiences with this remapping scheme, both with respect to robustness and visual differences of the fits.en_US
dc.description.sectionheadersNew Models
dc.description.seriesinformationWorkshop on Material Appearance Modeling
dc.identifier.doi10.2312/mam.20171323
dc.identifier.isbn978-3-03868-035-2
dc.identifier.issn2309-5059
dc.identifier.pages5-8
dc.identifier.urihttps://doi.org/10.2312/mam.20171323
dc.identifier.urihttps://diglib.eg.org:443/handle/10.2312/mam20171323
dc.publisherThe Eurographics Associationen_US
dc.subjectI.3.3 [Computer Graphics]
dc.subjectThree Dimensional Graphics and Realism
dc.subjectColor
dc.subjectshading
dc.subjectshadowing
dc.subjecttexture
dc.titleImage-based Remapping of Material Appearanceen_US
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MAM2017: Eurographics Workshop on Material Appearance Modeling