一种新的网格曲面上的特征线提取方法
A New Method for Extracting Feature Lines on Triangular Surface

提出一种新的三角网格模型的特征线提取方法。首先交互地选取几个初始特征点，利用追踪投影法确定初始特征线；对初始特征线进行均匀采样，找出采样点n环邻域内平均曲率最大的点作为新的特征点；利用这些新的特征点拟合B样条曲线；将B样条曲线投影在三角网格曲面上。实验结果表明，利用该方法获得的特征线比较光滑而且逼近特征。
A new method is presented for extracting feature lines on triangular surfaces. The initial feature line is extracted with the tracing-projection algorithm with a few feature points specified. Several sample points are obtained with uniform sampling the initial feature line. The sample points are then replaced by new feature points acquired with finding the maximum mean curvature point among the points around each sample point. A B-spline curve is fitted with the new feature points. Finally, the feature line which captures surface feature very well is obtained with projecting the B-spline curve on the triangular surfaces. Experimental results demonstrate that the feature line extracted with the present method can smoothly capture the object features