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用主动轮廓模型优化网格曲面上的特征线
引用本文:刘胜兰,周儒荣,张丽艳.用主动轮廓模型优化网格曲面上的特征线[J].计算机辅助设计与图形学学报,2004,16(4):439-443,448,T001,T002.
作者姓名:刘胜兰  周儒荣  张丽艳
作者单位:南京航空航天大学CAD/CAM工程研究中心,南京,210016
基金项目:国家自然科学基金 ( 60 2 73 0 97),高等学校优秀青年教师科研奖励计划基金,航空科学基金 ( 0 3H5 2 0 5 9),江苏省创新人才培养基金 (BK2 0 0 14 0 8)资助
摘    要:对主动轮廓模型在三维网格曲面上的表示进行研究.首先提出一种根据输入的点快速确定初始特征线的追踪投影法;然后计算出特征线的主动轮廓模型能量,其中特征能用平均曲率来表示;最后,特征线经多次迭代后移动到能量极小处,实现优化.实例表明,优化后的特征线既光滑又逼近特征.

关 键 词:特征线优化  主动轮廓模型  平均曲率  追踪投影法  三维网格曲面  计算机动画  科学计算可视化  CAD

Feature Line Optimization on Triangular Surfaces Using Active Contour Model
Liu Shenglan,Zhou Rurong,Zhang Liyan.Feature Line Optimization on Triangular Surfaces Using Active Contour Model[J].Journal of Computer-Aided Design & Computer Graphics,2004,16(4):439-443,448,T001,T002.
Authors:Liu Shenglan  Zhou Rurong  Zhang Liyan
Abstract:Authors applied the active contour model from image domain to 3D surface to represent the feature line on triangular surfaces, and solved such problems as how to obtain the initial contour and how to define the feature energy term. First, A tracing-projection algorithm is presented for obtaining the initial contour by linking the user-specified points. Then, mean curvature that describes the local surface feature quite well is defined as the feature energy term. And the total energy of an active contour is computed. Finally, the feature line is optimized to the energy-minimizing position by iterations. Experimental results demonstrate that the optimized feature line can smoothly capture the object features.
Keywords:feature line optimization  triangular surfaces  active contour model
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