报告题目：Topologically robust B-spline surface reconstruction from point clouds　using level set methods and iterative geometric fitting algorithms
时间：6月18日上午10：00-11：00
地点：浙江大学紫金港校区CAD&CG国家重点实验室402室
报告人：前川卓教授（日本横浜国立国立大学机械工程系）
主持人：冯结青教授

Abstract：A procedure for automatically reconstructing an arbitrary topological　surface from an unorganized point data set is presented; this surface will have three representations, namely quadrilateral meshes, Catmull–Clark subdivision surfaces, and B-spline　surfaces. The proposed reconstruction method adapts a level set method to capture the topology　of the point clouds in a robust manner and then employs an iterative geometric fitting　algorithm to generate high-quality Catmull–Clark subdivision surfaces. A quadrilateral mesh　is generated by projecting the control net of the resulting Catmull–Clark surface onto its limit surface. Finally, the control net of the Catmull–Clark surface is converted to that of　a B-spline surface. The reconstructed models of topologically complex models show the　effectiveness of the proposed algorithm.

Biography：Dr. Takashi Maekawa is a professor of Mechanical Engineering at Yokohama National University in Japan. He received his BS and MS in Mechanical Engineering from Waseda University, OE and PhD in CAD/CAM from MIT. He was previously a principal research scientist in the Department of Ocean Engineering at MIT, and a design engineer at Bridgestone Corporation.  Currently, he is one of the editors of Computer-Aided Design.  His research activities address a wide range of problems related to geometric modeling, computational geometry, differential geometry, and CAD/CAM.