用主动轮廓模型优化网格曲面上的特征线

Feature Line Optimization on Triangular Surfaces Using Active Contour Model

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 。

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.