一种织物背景上的指纹图像增强方法  

Method to Enhance the Fingerprint Image of Fabric Background

作　　者：寇为刚 杨昊亮 王秋云 李雄伟 陈颖 KOU Weigang;YANG Haoliang;WANG Qiuyun;LI Xiongwei;CHEN Ying(College of Public Security Technology,Gansu Institute of Political Science and Law,Lanzhou 730070,China;Gansu Provincial Key Laboratory of Evidence Science Research and Application,Lanzhou 730070,China)

机构地区：[1]甘肃政法大学公安技术学院,兰州730070 [2]甘肃省证据科学技术研究与应用重点实验室,兰州730070

出　　处：《刑事技术》2020年第3期259-262,共4页Forensic Science and Technology

基　　金：国家自然科学基金项目(61861002);兰州市科技发展计划项目(2018-3-9);甘肃省青年科技基金计划(17JR5RA159)。

摘　　要：目的提出使用Photoshop软件中Lab模式分离织物背景上指纹的方法。方法使用Photoshop CC2018软件,对1200dpi格式的扫描样本,经单通道优化、通道差值计算等方法进行优化,在海鑫指掌纹自动识别系统5.10版中验证指纹图像增强方法的优劣。结果 Lab模式处理织物背景上的指纹能够减弱背景干扰、改善图像质量,增加比对特征点。结论指纹图像经过增强处理可以高效、精准地识别出指纹特征点,相比于无增强处理的指纹图像呈现更多的特征点。Objective To present a method on separating fi ngerprint image from fabric background by the manipulation of Photoshop’s Lab mode.Methods The CC2018 version of Photoshop software was used to optimize the scanned samples(harboring fi ngerprint images of various fabric backgrounds)obtained under the 1200dpi format through the handling of single channel enhancement,channel difference calculation and other choices,with the enhanced fi ngerprint images being verifi ed via Haixin finger-/palm-print automatic recognition system(version 5.10).Results The Lab mode,one image processing choice of Photoshop,does signifi cantly improve the image quality of fi ngerprint on fabric background and increase the feature points for comparison.Conclusions With the enhanced processing from Photoshop’s Lab mode,fi ngerprint images can be effi ciently and accurately identifi ed of the feature points,having shown more feature points than those not undergoing through the enhanced processing.

关 键 词：痕迹学 指纹识别 织物 PHOTOSHOP 差值计算 

分 类 号：DF794.1[政治法律—诉讼法学]