平面扫描技术在尿渍鞋印提取中的应用研究  

Application of plane scanning technology to lift footwear impressions in urine

作　　者：马杰[1] 刘晋[2] 班茂森[2] 

机构地区：[1]中国人民公安大学,北京100038 [2]公安部物证鉴定中心,北京100038

出　　处：《刑事技术》2014年第6期30-32,共3页Forensic Science and Technology

摘　　要：目的应用平面扫描技术建立尿渍鞋印的光学无损提取方法。方法通过调整光源入射角度和反射光接收角度等参数,运用3种平面扫描方法提取大理石、地板革和瓷砖等6种客体上遗留的尿渍鞋印。结果基于平面扫描技术的尿渍鞋印提取方法,显著增加了痕迹与承痕客体之间的亮度反差,消除或减弱承痕客体背景干扰。比较筛选得到了大理石、地板革和瓷砖等客体上尿渍鞋印的最佳平面扫描方法。结论平面扫描方法可作为一种光学无损方法用于尿渍鞋印的提取。Objective To establish a non-deconstructive method to lift footwear impressions in urine with the plane scan- ning technology. Methods Footwear impressions deposited on marble, plastic flooring and ceramic tile surface with urine as a contaminant were lift by three kinds of plane scanning methods, and the angle of incident light and reflected light was adjusted to get satisfactory images. Results The contrast between the footwear impressions and background was enhanced significantly. The interference of background was reduced. Conclusions Plane scanning technique can be used to lift footwear impressions in urine as a non- deconstructive method.

关 键 词：尿渍鞋印 平面扫描 掠入射 暗视场 定向反射 

分 类 号：O657.31[理学—分析化学]