基于Lab模式的复杂背景上指纹的分离技术研究  

Lab-based Fingerprint Separation from Complex Background

作　　者：李雄伟 王秋云[1] LI Xiongwei;WANG Qiuyun(College of Public Security Technology,Gansu Institute of Political Science and Law,Lanzhou 730070,China)

机构地区：[1]甘肃政法学院公安技术学院,兰州730070

出　　处：《刑事技术》2018年第2期144-147,共4页Forensic Science and Technology

基　　金：中国民族语言文字信息技术-国家民委-教育部重点实验室开放课题项目(No.KFJJ201612)

摘　　要：目的考察验证在Photoshop软件中Lab模式下分离复杂背景上指纹的方法。方法采用600dpi分辨率扫描样本,并保存为jpeg格式,在Photoshop CC2017中的Lab模式下,通过单通道优化、通道差值计算和锐化等方法,对样本进行处理优化,验证复杂背景上指纹分离方法的优劣。结果 Lab模式下差值计算方法针对纸币上的指纹具有较好的分离效果,处理后的指纹特征明显,具备比对条件。结论 Lab模式下的图像差值计算可用于复杂背景上的指纹分离。Objective To investigate and validate the fingerprint separation from complex background by Lab model of Photoshop software.Methods The samples were scanned under 600dpi resolution and saved in JPGE format.With the Lab model of Photoshop CC 2017,the samples were processed through single channel optimization,channel difference calculation and sharpening,thereby having verified the advantages and disadvantages in separating fingerprint from its complex background.Results Under Lab model,the effect of difference calculation is better to separate the fingerprint on paper money,capable of making fingerprint features obvious and more comparable.Conclusion Lab-based image subtraction operation can be used for fingerprint separation from its complex background.

关 键 词：PHOTOSHOP Lab模式 指纹分离 差值计算 

分 类 号：DF794.1[政治法律—诉讼法学]