基于形态学方法的牙颌模型自动分割算法  

AUTOMATIC TOOTH SEGMENTATION ON DENTAL MESHES USING MORPHOLOGICAL OPERATORS

作　　者：陈虎 马珂楠 胡毕富 Chen Hu;Ma Kenan;Hu Bifu(Center of Digital Dentistry,Department of Prosthodontics,Peking University School and Hospital of Stomatology,Beijing 100081,China;School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China)

机构地区：[1]北京大学口腔医院口腔医学数字化研究中心,北京100081 [2]北京航空航天大学机械工程及自动化学院飞行器制造工程系,北京100191

出　　处：《计算机应用与软件》2023年第10期24-28,53,共6页Computer Applications and Software

基　　金：国家自然科学基金项目(51705006)。

摘　　要：为实现牙颌模型的自动分割,在形态学方法基础上提出一种自动闭合特征线的算法。根据牙颌模型顶点的曲率获得包含龈缘线轮廓和相邻牙齿分割线轮廓的初始特征区域;应用形态学方法获取初始特征区域的骨架特征,得到单个顶点宽度的特征线;采用连接区域搜索的方式查找特征线上存在断开处的端点并匹配,通过最短路径法连接端点形成封闭特征线,完成对牙颌模型的分割。初步测试结果显示,该算法对牙齿自动分割的成功率达到93.88%,能够实现较好的自动分割效果。In order to realize the automatic segmentation of the teeth and jaws model,this paper presents an automatic closing feature line algorithm based on morphological method.According to the curvature of the vertex of the dental model,the initial feature region including the contour of the gingival margin line and the contour of the adjacent tooth division line was obtained.The skeleton feature of the initial feature region was computed by morphological method,and the feature line of single vertex width was obtained.The connection area search method was used to find and match the end points with broken points on the feature line,and the shortest path method was used to connect the end points to form closed feature lines to complete the segmentation of the teeth and jaws model.Preliminary test results show that the successful rate of automatic tooth segmentation is 93.88%,and the algorithm can achieve a good automatic segmentation effect.

关 键 词：牙齿分割 形态学方法 牙颌模型 特征线 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]