TY - Generic T1 - Efficient perspective-accurate silhouette computation and applications T2 - Proceedings of the seventeenth annual symposium on Computational geometry Y1 - 2001 A1 - M. Pop A1 - Duncan, Christian A1 - Barequet, Gill A1 - Goodrich, Michael A1 - Huang, Wenjing A1 - Kumar, Subodh KW - rendering KW - silhouette KW - simplification AB - Silhouettes are perceptually and geometrically salient features of geo metric models. Hence a number of graphics and visualization applications need to find them to aid further processing. The efficient computation of silhouettes, especially in the context of perspective projection, is known to be difficult. This paper presents a novel efficient and practical algorithm to compute silhouettes from a sequence of viewpoints under perspective projection. Parallel projection is a special case of this algorithm. Our approach is based on a point-plane duality in three dimensions, which allows an efficient computation of the \emph{changes} in the silhouette of a polygonal model between consecutive frames. In addition, we present several applications of our technique to problems from computer graphics and medical visualization. We also provide experimental data that show the efficiency of our approach. million vertices on an SGI Onyx workstation. JA - Proceedings of the seventeenth annual symposium on Computational geometry T3 - SCG '01 PB - ACM CY - New York, NY, USA SN - 1-58113-357-X ER -