NURBS surface generation based on the feature extraction techniques in the reverse engineering

作为逆向工程中的基本技术，我们开发了分割技术，如一个柏拉图式的固体，和一个确定的分析表面，如，二次曲线和球体，从而分割剩余的自由曲面，基于特征线。我们得出结论，线为基础的方法是其中最好的。对T样条的组合算法进行了改进。此外，我们开发的技术，以加速分割算法。

As the fundamental techniques in the reverse engineering, we developed the segmentation techniques such as the one with platonic solids, and the one identifying the analytic surfaces for example, conics and spheres, and thus segmenting the remaining free-form surfaces, based on the feature lines. We concluded that the line-based method is the best among them. We also enhanced the combination algorithm of T-splines. Moreover we developed the technique to accelerate the segmentation algorithm.