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dc.contributor.authorKimmel, Bradley William 20:56:23 (GMT) 20:56:23 (GMT)
dc.description.abstractThe fading of materials due to light exposure over time is a major contributor to the overall aged appearance of man-made objects. Although much attention has been devoted to the modeling of aging and weathering phenomena over the last decade, comparatively little attention has been paid to fading effects. In this dissertation, we present a theoretical framework for the physically-based simulation of time-dependent spectral changes induced by absorbed radiation. This framework relies on the general volumetric radiative transfer theory, and it employs a physicochemical approach to account for variations in the absorptive properties of colourants. Employing this framework, a layered fading model that can be readily integrated into existing rendering systems is developed using the Kubelka-Munk theory. We evaluate its correctness through comparisons of measured and simulated fading results. Challenges in the acquisition of reliable measurements are discussed. The performance characteristics of the proposed model are analysed, and techniques for improving the runtime cost are outlined. Finally, we demonstrate the effectiveness of this model through renderings depicting typical fading scenarios.en
dc.publisherUniversity of Waterlooen
dc.subjectComputer Graphicsen
dc.subjectLight Exposureen
dc.subjectMaterial Appearanceen
dc.titleAppearance Changes due to Light Exposureen
dc.typeDoctoral Thesisen
dc.pendingfalse R. Cheriton School of Computer Scienceen Scienceen of Waterlooen
uws-etd.degreeDoctor of Philosophyen
uws.contributor.advisorBaranoski, Gladimir
uws.contributor.affiliation1Faculty of Mathematicsen

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