2种三维颜面部扫描仪测量精度的定量评价  

Quantitative evaluation of the measurement accuracy of 2 three-dimensional facial scanners

作　　者：赵一姣[1] 熊玉雪 杨慧芳[1] 吕培军[1] 孙玉春[1] 王勇[1] 

机构地区：[1]北京大学口腔医学院·口腔医院口腔医学数字化研究中心,口腔数字化医疗技术和材料国家工程实验室,100081

出　　处：《实用口腔医学杂志》2016年第1期37-42,共6页Journal of Practical Stomatology

基　　金：国家自然科学基金(编号:81300921);国家863计划课题(编号:2013AA040801)

摘　　要：目的:对三维颜面部扫描仪进行真人实际测量精度评价。方法:分别应用三维颜面部扫描仪3dMD和FaceScan获取10名正常面型志愿者的三维面相数字模型,测量每个模型上的10个特征线段长度和5个特征角度,并分别与高精度线激光扫描仪(Faro)获取的参考值进行统计学分析和测量学分析,计算面貌特征测量误差与实际测量精度。结果:3dMD和FaceScan对正常面型人群的长度测量精度分别为(-0.37±0.68)mm和(-0.29±0.53)mm(P=0.223),角度测量精度分别为(-0.22±2.14)°和(0.12±2.69)°(P=0.428)。结论:2种三维面部扫描仪获取的三维面相数据无显著差异。Objective： To evaluate the actual measurement accuracy of 2 three-dimensional （3D）facial scanners for real person. Methods ： 3D digital face models of 10 volunteers with normal ficial form were obtained by 3dMD and FaceScan facial scanners respec- tively. The measurement values of 10 feature lengths and 5 feature angles were measured on each 3D model by the software respective- ly. The reference values of all characteristics were acquired by line laser scanner （Faro） with high accuracy. Statistical and surveying analysis were taken between the measurement values and reference values. Facial morphology measurement error and actual accuracy of facial scanners were obtained finally. Data were statistically analysed. Results： The length measurement accuracy of 3dMD and FaceS- can was （ - 0. 37 ± 0. 68 ） mm and （ - 0.29 ± 0. 53 ） mm （ P = 0. 223 ） , the angle measurement accuracy was （ - 0.22 ~ 2.14 ）°and （0.12±2.69）°（P =0. 428）, respectively. Conclusion： The 3D data of ficial morphology obtained by the 2 scanners are not signifi- cantly different.

关 键 词：三维面相 面部标志点 测量精度 测量误差 

分 类 号：R816.1[医药卫生—放射医学]