一种改进的三维形状非刚性对准方法

提出一种针对发生非刚性形变的三维物体自动对准的方法。该方法将相关点漂移(CPD)的点云对准方法与动态形变图相结合,实现了粗对准与细对准相结合的双尺度对准方法。首先,通过CPD方法将源模型初始对准到目标模型;其次,利用动态形变图简化源模型,高斯牛顿法优化形变能量函数求取最优变形场,并将该形变外推到源模型的所有顶点,完成自动对准。实验表明,该方法适用于完整或不完整三维模型的非刚性对准。

An Improved Non rigid Alignment Method for Three dimension Model

This paper presents an automatic a-lignment method of three dimension object with non rigid deformation .The method combines point cloud alignment method based on the coher-ent point drift （CPD ） with dynamic deformation graph ,to form a dual scale alignment process composed of coarse alignment and fine alignment . In the coarse alignment process ,roughly align the source model to the target model by CPD method . In the fine alignment process ：first ,simplify the source model by use of dynamic deformation graph ;second ,optimize the deformation energy function to get the optimal deformation parame-ters ;third ,make the deformation be extrapolated to all vertices of the source model ,to complete the au-tomatic alignment process .The method is applica-ble to complete or incomplete three dimension＆nbsp;model’s non rigid registration .