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Identifying diffraction effects in measured reflectances

hal.structure.identifierModels and Algorithms for Visualization and Rendering [MAVERICK]
dc.contributor.authorHOLZSCHUCH, Nicolas
hal.structure.identifierLaboratoire Photonique, Numérique et Nanosciences [LP2N]
hal.structure.identifierMelting the frontiers between Light, Shape and Matter [MANAO]
dc.contributor.authorPACANOWSKI, Romain
dc.contributor.editorReinhard Klein
dc.contributor.editorHolly Rushmeier
dc.date.accessioned2023-05-12T11:00:49Z
dc.date.available2023-05-12T11:00:49Z
dc.date.issued2015
dc.date.conference2015-06-23
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/182031
dc.description.abstractEnThere are two different physical models connecting the micro-geometry of a surface and its physical reflectance properties (BRDF). The first, Cook-Torrance, assumes geometrical optics: light is reflected and masked by the micro-facets. In this model, the BRDF depends on the probability distribution of micro-facets normals. The second, Church-Takacs, assumes diffraction by the micro-geometry. In this model, the BRDF depends on the power spectral distribution of the surface height. Measured reflectance have been fitted to either model but results are not entirely satisfying. In this paper, we assume that both models are valid in BRDFs, but correspond to different areas in parametric space. We present a simple test to classify, locally, parts of the BRDF into the Cook-Torrance model or the diffraction model. The separation makes it easier to fit models to measured BRDFs.
dc.description.sponsorshipAnalyse des opérateurs de transport lumineux et applications - ANR-11-BS02-0006
dc.language.isoen
dc.publisherEurographics Association
dc.title.enIdentifying diffraction effects in measured reflectances
dc.typeCommunication dans un congrès avec actes
dc.identifier.doi10.2312/mam.20151201
dc.subject.halInformatique [cs]/Synthèse d'image et réalité virtuelle [cs.GR]
bordeaux.page31-34
bordeaux.hal.laboratoriesLaboratoire Photonique, Numérique et Nanosciences (LP2N) - UMR 5298*
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.countryDE
bordeaux.title.proceedingEurographics Workshop on Material Appearance Modeling
bordeaux.conference.cityDarmstadt
bordeaux.peerReviewedoui
hal.identifierhal-01170614
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01170614v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.date=2015&rft.spage=31-34&rft.epage=31-34&rft.au=HOLZSCHUCH,%20Nicolas&PACANOWSKI,%20Romain&rft.genre=proceeding


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