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B-spline Volume BRDF Representation and Application in Physically-based Rendering  

Lee, Joo-Haeng (한국전자통신연구원)
Park, Hyung-Jun (조선대학교 산업공학과)
Publication Information
Korean Journal of Computational Design and Engineering / v.13, no.6, 2008 , pp. 469-477 More about this Journal
Abstract
Physically-based rendering is an image synthesis technique based on simulation of physical interactions between light and surface materials. Since generated images are highly photorealistic, physically-based rendering has become an indispensable tool in advanced design visualization for manufacturing and architecture as well as in film VFX and animations. Especially, BRDF (bidirectional reflectance distribution function) is critical in realistic visualization of materials since it models how an incoming light is reflected on the surface in terms of intensity and outgoing angles. In this paper, we introduce techniques to represent BRDF as B-spline volumes and to utilize them in physically-based rendering. We show that B-spline volume BRDF (BVB) representation is suitable for measured BRDFs due to its compact size without quality loss in rendering. Moreover, various CAGD techniques can be applied to B-spline volume BRDFs for further controls such as refinement and blending.
Keywords
BRDF; B-spline volume; physically-based rendering; reflectance model; data reduction; approximate lofting;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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