汤凯教授的学术报告

发布时间:2015年10月22日 作者:刘圣军   消息来源:科研办    阅读次数:[]

报告人:汤凯教授,香港科技大学教授 

报告题目:Curved Reflection Symmetric Axes on Free-form Surfaces and Their Extraction 

报告时间:2015年10月26日上午10:00-11:00 

报告地点:数学楼145学术报告厅 

摘 要:Feature detection on smooth free-form surfaces is much more difficult than that on shapes with sharp features. In this paper, we extract the curved reflection axes of an arbitrary free-form surface as features if they exist. The extraction result is robust to boundary noises and strongly sensitive to the extrinsic properties of the surface such as projected normals and curvatures. Compared with the general reflection symmetry, curved reflection symmetry is defined to be a reflection symmetry along a smooth 3D embedded curve instead of a plane, where any point on the curve is a local reflection center for some surface points. The properties of the curved reflection symmetric axis are analyzed, and a novel computational model for detecting and extracting curved reflection axes (CRA) on free-form surfaces is presented. The experimental results are then compared with both the medial axis and the intrinsic symmetric axis, which are two popular feature representations of 3D shapes, and the advantages and uniqueness of the proposed method are convincingly demonstrated. An application of the proposed method in sweep scanning is also presented. Other applications of the proposed method include feature extraction, shape symmetrization, segmentation and registration, etc. 

报告人简介: 

汤凯于1982年一月毕业于南京工学院机械系,获工程学士学位,同年考取教育部公费研究生,1984年八月赴美国密执安大学计算机系攻读硕士及博士,于1990年12月获计算机工程博士学位,研究方向为计算几何及其应用。在密执安大学读书其间,汤凯曾经在克莱斯特汽车公司工作三年,从事模具成型的计算机模拟图形软件的开发。 

从1991年六月至2001年六月,整十年,汤凯就职于美国APPLICON公司 (后被UniGraphics收购),主要从事CAD/CAM软件的开发和研制,任高级软件专家。在此其间,利用业余时间,在CAD,GRAPHICS MODELS AND IMAGE PROCESSING,ASME JOURNAL OF MECHANICAL DESIGN,COMPUTERS IN INDUSTRY上发表了十几篇论文。 

在美其间,汤凯还积极参与华人社区服务,曾于1999-2001任安华中文学校校长。 

自2001年七月起,汤凯被香港科技大学聘为助理教授,从事教学和科研工作,并于2011年被提升为正教授。汤凯目前的研究方向为:几何造型,曲面平展算法,五轴加工路线的产生及优化算法,快速成型加工的优化算法,神经网络理论在机械设计及制造中的应用。目前在国际各种顶尖杂志上发表论文一百多篇。现为《Computer-Aided Design》、《Journal of Computational Design and Engineering》等国际杂志的编委。 

除了科学研究,汤凯对文学写作也非常喜爱,近年来在一些网站陆续发表了不少小说,散文,和随笔等文学作品,全部作品可在如下网站找到:http://ihome.ust.hk/~mektang/public_files/here_and_there.html



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