Precision Normals (Beyond Phong)

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dc.contributor.authorOlano, Marc
dc.contributor.authorYoo, Terry S.
dc.date.accessioned2026-02-03T18:15:02Z
dc.date.issued1993
dc.description.abstractAlmost all graphics architectures today support Gouraud shading, linearcolor interpolation between vertices; system designers aim toward aPhong shading model, linear interpolants of surface normals with alighting model that supports both diffuse and specular components, as asuperior means of rendering accurate images. However, the Phongmodel still retains serious artifacts. In this paper, we point out theshortcomings of linear interpolation of normals, and present a surfaceinterrogation method for parametrically defined surfaces.
dc.description.sponsorshipThis work has been supported by the National Science Foundation (NSF), NSF Grant No. MIP-9000894, the Defense Advanced Research Projects Agency (DARPA), ISTO Order No. 7510, and through the NSF/DARPA Science and Technology Center for Computer Graphics and Scientific Visualization (NSF Cooperative Agreement No. ASC8920219). Special thanks to Pixar for access to a RenderManÔ license without which this research would have progressed much slower.
dc.description.urihttps://userpages.cs.umbc.edu/olano/papers/beyond-phong.pdf
dc.format.extent4 pages
dc.genretechnical reports
dc.genrepreprints
dc.identifierdoi:10.13016/m2nors-chdo
dc.identifier.urihttp://hdl.handle.net/11603/41698
dc.language.isoen
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC College of Engineering and Information Technology Dean's Office
dc.relation.ispartofUMBC Computer Science and Electrical Engineering Department
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.subjectUMBC Ebiquity Research Group
dc.titlePrecision Normals (Beyond Phong)
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0003-4209-6103

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