基于水平集的砂轮颗粒表面3D重建  

3D Reconstruction of Surface of Grinding Wheel Based on Level Set

作　　者：龚俊锋[1] 

机构地区：[1]三明学院

出　　处：《工具技术》2010年第10期106-109,共4页Tool Engineering

摘　　要：聚焦融合法能够提取出砂轮表面的高度信息,但是由于聚焦融合方法易受图像高频信息干扰,难以重构出符合实际形貌的三维表面。本文提出先将由聚焦融合得到的初始曲面变换到更高一维的坐标系中,用水平集来进行表示。并采用Min/Max曲率流来构造变形曲面的弹性力,使用数值解法求解曲面演化偏微分方程,从而使初始曲面演化到更符合砂轮实际情况的三维曲面,实验结果证明了该方法的有效性。The method of depth from focus（DFF） can get the depth information of the surface of grinding wheel,but it is sensitive to high frequency information of image,and hard to reconstruct the exact 3D surface directly. By using the method in this paper,the initial surface getting from DFF is converted to the higher dimension space,and expressed by level set function. And then the Min/Max is used to created the drive force for surface evolving. The PDE of surface evolving is solved numerically,and the gotten 3D surface is much more close to the real grinding wheel.The result proved the validity of the method.

关 键 词：砂轮地貌 水平集 Min/Max 聚焦融合 三维重构 

分 类 号：TG74[金属学及工艺—刀具与模具]