紫外荧光加分色照相拍摄彩色背景上汗潜指印的探讨

UV fluorescence plus background color separation color photography shoot latent fingerprints of sweat

在拍摄彩色背景上汗潜指印时,传统的方法是在汗潜指印上刷显有色荧光粉,再利用紫外线作为激发光源激发有色荧光粉发出荧光图像的照相方法来加以解决,这种方法是在汗液指印比较清晰的情况下可以获得一定的效果。但随着反侦查意识的增强,案犯在现场遗留的清晰痕迹物证将会越来越少,因此,提取现场疑难痕迹物证特别是在复杂背景上的汗潜指印将成为刑事技术人员不得不面临的问题。本文探讨的就是在复杂背景上的汗潜指印用传统紫外荧光照相法效果不理想的情况下,再加用分色照相的方法将二者融合在一起来解决这个问题的实验探讨。

In the shooting sweat latent fingerprint on a colored background, the traditional method is to brush the sweat latent fingerprint was on the colored phosphor, re-use of ultraviolet light as the excitation source to stimulate phosphor fluorescent colored photographic image of the way to resolve this fingerprints in the sweat is more clear in the case can get certain effects. But with the awareness of anti-investigation, the perpetrators left the scene will be less and less clear traces of evidence, therefore, difficult to extract traces of evidence, especially the scene in a complex background of latent fingerprint on the sweat will be the technical staff had to face criminal problem. This article explores the background is a complex latent fingerprint sweat radiography with conventional UV-fluorescence effect is not an ideal situation, coupled with a photographic color separation method will allow the two together to solve this problem the experimental study.