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结合颅骨形态特征与神经网络的民族判别

孙慧杰 赵俊莉 郑鑫 热孜万古丽·夏米西丁 李奕 周明全

孙慧杰, 赵俊莉, 郑鑫, 等 . 结合颅骨形态特征与神经网络的民族判别[J]. 北京航空航天大学学报, 2021, 47(3): 641-649. doi: 10.13700/j.bh.1001-5965.2020.0446
引用本文: 孙慧杰, 赵俊莉, 郑鑫, 等 . 结合颅骨形态特征与神经网络的民族判别[J]. 北京航空航天大学学报, 2021, 47(3): 641-649. doi: 10.13700/j.bh.1001-5965.2020.0446
SUN Huijie, ZHAO Junli, ZHENG Xin, et al. Ethnic identification by combining features of skull morphology with neural network[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(3): 641-649. doi: 10.13700/j.bh.1001-5965.2020.0446(in Chinese)
Citation: SUN Huijie, ZHAO Junli, ZHENG Xin, et al. Ethnic identification by combining features of skull morphology with neural network[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(3): 641-649. doi: 10.13700/j.bh.1001-5965.2020.0446(in Chinese)

结合颅骨形态特征与神经网络的民族判别

doi: 10.13700/j.bh.1001-5965.2020.0446
基金项目: 

国家自然科学基金 61702293

全国统计科学研究项目 2020355

教育部虚拟现实应用工程研究中心基金项目 MEOBNUEVRA201601

中国博士后科学基金 2017M622137

山东省重点研发计划重大科技创新工程 2019JZZY020101

详细信息
    作者简介:

    孙慧杰   女,硕士研究生。主要研究方向:计算机图形学

    赵俊莉   女,博士, 副教授, 硕士生导师。主要研究方向:计算机图形学、计算机视觉、虚拟现实

    通讯作者:

    赵俊莉,E-mail: zhaojl@yeah.net

  • 中图分类号: TP183

Ethnic identification by combining features of skull morphology with neural network

Funds: 

National Natural Science Foundation of China 61702293

National Statistical Science Research Project 2020355

the Open Research Fund of the Ministry of Education for Engineering Research Center of Virtual Reality Application MEOBNUEVRA201601

China Postdoctoral Science Foundation 2017M622137

Key Research and Development Plan-Major Scientific and Technological Innovation Projects of ShanDong Province 2019JZZY020101

More Information
  • 摘要:

    针对颅骨民族判别问题,提出结合颅骨形态特征与神经网络的判别方法,可以推进法医人类学的发展,加快探索民族发展历程。首先,根据颅骨形态学相关研究,提取36个维吾尔族和汉族颅骨数据的几何特征;其次,采用反向传播神经网络(BPNN)对特征向量进行民族判别,并通过Adam算法对网络进行优化,避免陷入局部最优值,添加正则化项保证算法稳定性;最后,分别采用2种网络结构进行对比实验,输入层、隐藏层和输出层的神经元个数分别为36、6、2和36、12、2,并设置不同初始学习率进行对比实验。结果表明:隐藏层神经元个数为12、学习率为0.000 1时,分类精度最高,测试阶段平均准确率最高为97.5%。为了验证所提方法的普适性,生成116例国外颅骨数据进行实验,测试阶段平均准确率为90.96%。相比较于支持向量机(SVM)、决策树、KNN、Fisher等机器学习方法,所提方法学习能力更强且分类精度有明显提升。

     

  • 图 1  颅骨民族鉴定流程

    Figure 1.  Flowchart of skull ethnic identification

    图 2  颅骨头部轮廓、鼻子及眼睛环状边界信息

    Figure 2.  Skull contour, nose and eye ring boundary information

    图 3  颅骨头部轮廓边界特征示意图

    Figure 3.  Schematic diagram of skull contour boundary feature

    图 4  BPNN网络结构

    Figure 4.  BPNN network structure

    图 5  网络结构[36∶6∶2]下不同学习率的训练损失变化

    Figure 5.  Training loss change of network structure [36∶6∶2] under different learning rates

    图 6  网络结构[36∶12∶2]下不同学习率的训练损失变化

    Figure 6.  Training loss change of network structure [36∶12∶2] under different learning rates

    图 7  学习率为0.000 1时2种网络结构的训练平均准确率

    Figure 7.  Training accuracy rate of two network structures when learning rate is 0.000 1

    图 8  不同分类方法的ROC曲线

    Figure 8.  ROC curves of different classification methods

    图 9  汉族、维吾尔族和国外颅骨分类的混淆矩阵

    Figure 9.  Confusion matrix of Han, Uighur and foreign skull ethnic identification

    表  1  维吾尔族与汉族面部及头部主要形态差异

    Table  1.   Main morphological differences of face and head between Uygur and Han

    主要特征 维吾尔族 汉族
    眼睛 眼裂开度中等、内外平行、眼为楔形结构 眼裂开度中等、倾斜程度水平
    鼻子 鼻根中等偏高、鼻尖大多向前、鼻长明显长于其他民族、属狭鼻型 鼻根中等、鼻基部水平、属中鼻型
    肤色 肤色呈黄、白或棕褐 黄色居多
    头型 特圆头型和超圆头型 特圆头型和圆头型
    下载: 导出CSV

    表  2  不同网络结构及参数下的测试平均准确率

    Table  2.   Test accuracy rate under different network structures and parameters

    网络结构 学习率 迭代次数/104 平均准确率/%
    0.01 10 95
    [36∶6∶2] 0.001 10 94.16
    0.000 1 10 92.5
    0.01 10 93.3
    [36∶12∶2] 0.001 10 94
    0.000 1 10 97.5
    下载: 导出CSV

    表  3  不同分类方法的平均准确率

    Table  3.   Identification rate of different classification methods

    方法 平均准确率/%
    SVM 77.5
    KNN 84.1
    Fisher 57.5
    决策树 91.6
    本文 97.5
    下载: 导出CSV
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  • 收稿日期:  2020-08-24
  • 录用日期:  2020-09-05
  • 刊出日期:  2021-03-20

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