刑事技术Issue(3)：215-217,3.DOI:10.16467/j.1008-3650.2015.03.011
光谱成像和传统光学方法增强光滑纸张上血指印的比较研究
Comparison of Spectral Imaging and Traditional Optical Methods for Enhancing Blood Fingerprints on Glossy Paper
赵丽华 1何海明2
作者信息
- 1. 杭州市余杭区公安司法鉴定中心 杭州311100
- 2. 杭州市公安司法鉴定中心，杭州310004
- 折叠
摘要
Abstract
ABSTRACT:ObjectiveTo compare the effects of spectral imaging and traditional optical methods for blood ifngerprints on glossy paper with complex background and the regularity and characteristics of eliminating background, for the purpose of selection the most optimal photographical method.MethodsThree methods were employed to take photo of blood ifngerprint samples on 21 different kinds of glossy paper separately: the optical directional relfection at small angle with light illumination for photography; the visible spectrum imaging at 420~720 nm band of the Multiple Spectral Imager, classifying images and ifltering the mixed; the full-wave band CCD system for the constant temperature locking by reducing temperature and ifltering noise, illuminating with light in the dark ifeld, and the relfex photography by 254 nm short-wave ultraviolet band.Results Different images of blood ifngerprints on 21 kinds of glossy paper had been taken, among which, the image effects were obviously improved by light illumination method at 19%, Multiple Spectral Imager at 33% and full-wave band CCD system at 66% respectively after eliminating blood fingerprint background interference.ConclusionsDifferent imaging methods by multiple spectra for blood fingerprints on different glossy paper could eliminate the interference under some specific background, and to improve the imaging effects. It is suggested to select the right photographic method by the corresponding spectrum according to the real effect of eliminating interference from the background of the blood ifngerprints.关键词
血指印/光谱成像/光滑纸张/复杂背景干扰/配光角度Key words
blood ifngerprints/spectral imaging/glossy paper/complex background interference/light illumination angle分类
社会科学引用本文复制引用
赵丽华,何海明..光谱成像和传统光学方法增强光滑纸张上血指印的比较研究[J].刑事技术,2015,(3):215-217,3.
