摘要
义齿窝洞预备体的数字化评估目前在我国还是空白,该类产品主要由国外垄断.基于激光三角测量法的义齿窝洞预备体三维重构技术以制备的窝洞预备体为测量对象,利用非接触式三角测量技术获取预备体表面形态的数据信息,采用K-D(K-Dimension,K-D)树搜索策略实现ICP(Iterative Closest Point,ICP)算法中对应点的选取,将ICP拼接后的数据分为四个块,保留每个相机径向上的部分,在此基础上通过去噪、消差、三角面法等技术实现被测预备体的三维重构.结果表明,本分提出的解决方案能够客观的呈现窝洞预备体的三维形貌.与国外同类技术比较,在保证三维点集配准精确度的情况下,有效提高了系统的整体运算速度.
Digtal evaluation of cavity preparation is still a gap in China. The products of this class are still monopolized by forerign companies. The 3D model reconstruction for cavity preparation based on laser triangulation took the dental cavity preparation as the object. The original data of dental surface were obtained by non-contact 3D scanning. The corresponding points in ICP algorithm were selected by using K-D tree searching policy,and the results were divided into four sections with each radial direction kept. The 3D model reconstruction was completed through denoising, triangular meshes techniques. The testing results show that the proposed method can present the 3D model of cavity preparation. Compared with other techniqnes abroad,the new method improves the efficiency of the system.
出处
《西安工业大学学报》
CAS
2016年第1期26-30,共5页
Journal of Xi’an Technological University
基金
陕西省科技统筹创新工程(2014KTCQ01-22)
陕西省特种加工重点实验室开放基金(ST-12011)
