弓型纹中心区域相似异源现象研究  

Close Non-Matching Study on Central Region of Arch

作　　者：杨俊[1] 罗亚平[1] 李康[1,2] 李硕[1] 韩文强 YANG Jun;LUO Yaping;LI Kang;LI Shuo;HAN Wenqiang(People’s Public Security University of China,Beijing 100038,China;Zhejiang Police College,Hangzhou 310053,China)

机构地区：[1]中国人民公安大学,北京100038 [2]浙江警察学院,杭州310053

出　　处：《刑事技术》2023年第5期513-518,共6页Forensic Science and Technology

基　　金：教育部科技委战略研究项目:强化法庭科学基础研究,完善我国科学证据体系研究。

摘　　要：本文研究相似异源指纹在大规模数据库中的出现情况,以增强指纹工作人员应对相似异源指纹的风险意识。基于千万级人数据库,选取40枚弓型纹中心区域开展研究,每枚指纹标注40个特征点开始发送查询,依次减少特征点数量,探究特征点数量与同源指纹和相似异源指纹出现率之间的关系,并对现场指纹的高频相似区域及相似异源指纹的纹型进行统计分析。结果表明,随着特征点数量增多,同源指纹出现率升高,相似异源指纹出现率降低;40枚弓型纹共计找到454枚相似异源指纹,其中一枚异源指纹与现场指纹具有15个特征点完全一致;平均每次查询前100位候选队列中相似异源指纹出现率约为75.7%,低度、中度与高度相似异源指纹出现率分别为46.5%、19.7%、9.5%;此外,相似异源指纹更多出现在弓型纹中心部位的3、4、6号区域,出现率分别为44.27%、24.45%、18.5%,且相似异源指纹更多来源于箕型纹的三角区域。本研究有助于提高指纹工作人员识别相似异源指纹的能力,提示指纹工作人员应多加注意弓型纹中心区域的中下部相似异源指纹的出现情况。The paper aims to study the occurrence of close non-matches(CNMs)in large-scale databases to enhance the risk awareness of fingerprint practitioners when they compare the suspect’s fingerprint against the ones from AFIS.Based on the database of more than 10 million people,the central areas of 40 arches were selected for research.Each fi ngerprint is marked with 40 minutiae to start sending queries.Reducing the number of feature points,in turn,to explore whether the amount can infl uence the AFIS occurrence rate of homologous fi ngerprints and CNMs,and make statistics on the similar areas of fi ngerprint and patterns of CNMs.Usually,as the number of minutiae increases,the occurrence rate of homologous features increases,and the occurrence rate of CNMs decreases.A total of 454 CNMs were found in 40 arches of volunteers’fi ngerprints,one of CNMs was completely consistent with 15 feature paints.Average per query,the occurrence rate of CNMs in the top 100 candidates of each query is about 75.7%,of which the proportions of CNMs of the low,medium,and high levels are 46.5%,19.7%,and 9.5%,respectively.In addition,CNMs appeared more in the arch pattern center’s 3,4,and 6 regions,with an occurrence rate of 44.27%,24.45%,and 18.5%,respectively,and CNMs were more from the triangular region of the dustpan pattern.This study contributes to improving the ability of fi ngerprint practitioners to identify CNMs,suggesting that fi ngerprint practitioners should pay more attention to the occurrence of CNMs in the middle-under parts of the central area of the arch.

关 键 词：指纹鉴定 指纹自动识别系统 相似异源指纹 弓型纹 

分 类 号：D918.91[政治法律—法学]