DERMALOG Identification Systems GmbH, Mittelweg 120, 20148 Hamburg, Germany.
Forensic Sci Int. 2011 Oct 10;212(1-3):61-8. doi: 10.1016/j.forsciint.2011.05.014. Epub 2011 Jul 5.
Differentiation of living fingers, fake fingers and fingers from dead bodies was investigated using spectral analysis. For this purpose, reflection and transmission spectra in the wavelength region from 400 to 1650 nm were recorded from living volunteers and corpses. In an additional small test series (one living volunteer, three cadavers), time-resolved spectral images were prepared using reflectance (derived from pulse oximetry). The dynamic differences in the curves (including the absorption changes caused by the blanching effect and the pulse) provide initial approaches for the realisation of systems for liveness detection. Significant differences that would be useful for the integration into fingerprint recording systems of methods to defend against forgeries are discussed.
使用光谱分析研究了活体手指、假手指和尸体手指的区分。为此，从活体志愿者和尸体上记录了波长范围从 400 到 1650nm 的反射和透射光谱。在一个额外的小测试系列（一个活体志愿者，三个尸体）中，使用反射率（源自脉冲血氧仪）制备了时分辨光谱图像。曲线的动态差异（包括由发白效应和脉搏引起的吸收变化）为活体检测系统的实现提供了初步方法。讨论了将防御伪造方法集成到指纹记录系统中的有用差异。
