光学与光电技术, 2018, 16 (2): 71, 网络出版: 2018-06-01  

基于双目立体视觉的下颌运动轨迹测量方法

Measurement of Mandibular Motion Trajectory Based on Binocular Stereo Vision
作者单位
1 南京航空航天大学机电学院, 江苏 南京 210016
2 北京大学口腔医学院口腔数字化医疗技术和材料国家工程实验室, 北京 100081
摘要
针对医学领域下颌运动虚拟再现的测量需求和实际测量中牙齿遮挡与数据配准的相关问题,提出了一种基于单双目视觉系统结合的下颌运动轨迹跟踪与仿真系统。该系统由两台CCD相机和一台投影仪组成,采用双目测量系统的结构,由一套基于三角法重建的双目视觉测量系统和两套基于相移法的单目结构光系统组成,采用一个位置标定多个系统的标定方法,实现了数据的配准及融合。获取患者下颌运动轨迹和带颌垫牙齿点云数据后,将标准点云模型与获取的点云数据进行配准并导入仿真系统,仿真结果符合下颌运动规律,再现了患者各时刻的下颌运动空间姿态。实验结果表明,该系统实现了下颌运动的高精度虚拟再现,为下一步医学领域的应用奠定了基础。
Abstract
In order to meet the needs of virtual reproduction of mandibular motion in medical field, a tracking and simulation system of mandibular movement based on single binocular vision system is proposed. The system consists of two CCD cameras and a DLP3000 projector. Using the structure of binocular vision measurement system, it has a measurement system based on binocular vision triangulation reconstruction and two systems of monocular structured light based on phase shift method. The calibration method adopts one position to calibrate multi positions, and it realizes the data registration and fusion. Getting the mandibular movement and jaw pad teeth of point cloud data, the standard point cloud model is regstraed with the acquired point cloud data, and import it into the simulation system. The experimental results show that this system achieves high precision virtual reproduction of the mandibular movement, which lays the foundation for the application of the next medical field.

李兆杰, 刘长毅, 崔海华, 戴宁, 孙玉春. 基于双目立体视觉的下颌运动轨迹测量方法[J]. 光学与光电技术, 2018, 16(2): 71. LI Zhao-jie, LIU Chang-yi, CUI Hai-hua, DAI Ning, SUN Yu-chun. Measurement of Mandibular Motion Trajectory Based on Binocular Stereo Vision[J]. OPTICS & OPTOELECTRONIC TECHNOLOGY, 2018, 16(2): 71.

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