正面照片面部特征指标用于个人识别的选择及评价

Selection and evaluation of facial characteristic indexes of frontal photo for personal identification

目的研究中国汉族成人正面照片,优选出面部特征指标建立分型特征标准,考察面部特征的个人识别能力。方法确定27项面部特征指标及分型标准,观察254张中国汉族成人正面照片,通过统计分析观察数据结果及计算个人识别能力评价指标和分型标准。结果 13项指标性别差异显著;联合所选择的27个面部特征指标,男性TDP(tolal discrimination power,累计个人识别能力)=0.999 999 909 08,女性TDP=0.999 999 919 82,总体TDP=0.999 999 868。结论正面照片面部特征指标越多、分型的多态性及量化程度越高,个人识别能力越高。

Objective This article aim to optimize facial characteristic indexes and to establish the standard of classification by studying positive photos of Chinese Han nationality adults, and to investigate the personal identification power finally. Methods Firstly, we determined the 27 facial characteristic indexes and standard of classification. Secondly, we observed 254 positive photos of Chinese Han nationality adults. Finally, indexes and standard of classification are evaluated through statistically analysising of observation data results and calculating personal identification capability. Results Thirteen indexes gender differences are significant. All 27 facial characteristic indexes are calculated. Male TDP（total discrimination power）=0.999 999 909 08, female TDP=0.999 999 919 82, overall TDP=0.999 999 868. Conclusion The more facial characteristic indexes and the more classification and the higher degree of classification, the higher personal identification ability can be acquired.