法医学同一认定中腭皱图像感兴趣区域边界标定  

The Region of Interest in Boundary Calibration for Palatal Rugae Image of Forensic Identification

作　　者：张雄[1] 李冰[2] 上官宏 罗强 ZHANG Xiong;LI Bing;SHANGGUAN Hong;LUO Qiang(School of Electronic Information Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Stomatology Hospital,Shanxi Medical University,Taiyuan 030001,China)

机构地区：[1]太原科技大学电子信息工程学院,山西太原030024 [2]山西医科大学口腔医院,山西太原030001

出　　处：《法医学杂志》2020年第5期648-653,共6页Journal of Forensic Medicine

基　　金：supported by Shanxi Province Science Foundation for Youths(201701D221106);Tai yuan University of Science and Technology Doctora Promoter (20162044);The International Coopera tion Project of Science and Technology Departmen of Shanxi Province (201803D421);Scientific and Technological Innovation Team of Shanxi Province (201705D131025);Collaborative Innovation Cente of Internet+3D Printing in Shanxi Province(201708)

摘　　要：目的研究一种基于最小二乘拟合的用于腭皱区域边界计算的方法。方法根据牙齿的分布情况选择特征点,通过对选取的特征点进行最小二乘拟合,建立腭皱区域边界,根据上述边界构造掩模,去除掩膜外侧的部分,来滤除干扰。结果对拟合曲线的定量结果进行评价,通过6个拟合过程得到样本的相关系数(r)以及实测均值与理想均值。在6次拟合过程中,实际均值与理想均值的差异较小(0.2857~2.5000),且r的范围接近1(0.9896~0.9995)。结论采用的三次多项式拟合效果稳定,所提出的边界标定方法能有效定位腭皱边界消除干扰区,可以进一步促进腭皱识别在法医学同一认定中的应用。Objective To examine the method of least-square fitting for calibrating the palatal rugae boundary.Methods According to the distribution of the teeth,the feature points were selected;when they were fit,the boundary of the palatal rugae area was created,thereby constructing a mask.The mask was used to remove the part located outside the boundary and filter out the interference.Three samples were utilized for the experiments and analyses to come.Results To evaluate the quantitative results of the fitting curves,the correlation coefficients(r)of the samples and the relationship between the actual mean value and ideal mean value was obtained through six fitting processes.The differences between the actual mean and ideal mean were found to be significantly small(from 0.2857 to 2.5000)in the six fitting processes,with the range of r close to 1(from 0.9896 to 0.9995).Conclusion The effect of the cubic polynomial fitting method adopted in this study was stable.The proposed boundary calibration method can effectively locate the palatal rugae boundary and remove the interference area,further promoting the practice of forensic identification.

关 键 词：法医人类学 法医齿科学 腭皱 同一认定 边界标定 最小二乘拟合 感兴趣区域 

分 类 号：DF795.6[医药卫生—法医学]