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A Rendering Equation for Specular Transfers and Its Integration into Global Illumination
Author(s) -
Yu Yizhou,
Wu Hong
Publication year - 1997
Publication title -
computer graphics forum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 120
eISSN - 1467-8659
pISSN - 0167-7055
DOI - 10.1111/1467-8659.00165
Subject(s) - specular reflection , global illumination , specular highlight , computer science , rendering (computer graphics) , radiosity (computer graphics) , ray tracing (physics) , radiance , curvature , computer graphics (images) , gaussian , path tracing , gloss (optics) , gaussian curvature , wavefront , computer vision , optics , artificial intelligence , geometry , mathematics , physics , quantum mechanics , chemistry , organic chemistry , coating
In this paper, we present a rigorous theoretical formulation of the fundamental problem—indirect illumination from area sources via curved ideal specular surfaces. Intensity and area factors are introduced to clarify this problem and to rectify the radiance from these specular surfaces. They take surface geometry, such as Gaussian curvature, into account. Based on this formulation, an algorithm for integrating ideal specular transfers into global illumination is also presented. This algorithm can deal with curved specular reflectors and transmitters. An implementation is described based on wavefront tracing and progressive radiosity. Sample images generated by this method are presented.