基于网格抽取的牙齿模型快速分割算法

摘要

隐形牙套是口腔正畸学的一个热门研究方向,而牙齿分割是制作隐形牙套过程中非常重要的一个环节.针对交互标记控制算法分割时间长和欠分割等不足,提出一种基于网格抽取的牙齿模型快速分割算法.对于获得的三维牙齿模型,进行三维网格抽取;对抽取后的牙齿网格进行网格平滑;使用改进的交互标记控制算法将单颗牙齿分离出来.实验结果表明,提出的算法精度较好,避免了欠分割,并且分割速度较快,得到的单颗牙齿模型有助于牙齿矫正后续操作.%Invisible braces are a popular research direction of orthodontics,and tooth segmentation is very important in the process of making invisible braces.In order to solve the shortcomings of long and under-segmentation of interactive marker control algorithm,a fast tooth model segmentation algorithm based on mesh extraction was proposed.First,3D mesh extraction was performed on the obtained 3D tooth model.Next, the extracted tooth grid was mesh smoothed. Finally, a single tooth was separated using an improved interactive marker control algorithm.Experimental results showed that the proposed algorithm had good accuracy,avoided under-segmentation,and had a fast segmentation speed. The single tooth model obtained was helpful for the subsequent operation of orthodontics.