手静脉成像系统优化研究

Research on Optimization of Imaging System of the Hand Vein Optical Properties

静脉身份识别因其不易复制性近年发展迅速,其中光源的选择直接影响拍摄的图像质量。本文通过实验获取手背静脉与非静脉组织对不同近红外光波长的反射率,比较各波长反射率强弱,发现在810nm波长处静脉和非静脉组织的反射率具有最强的对比度,适合作为静脉成像光源。最后利用所选光源进行手静脉图像采集,获得了清晰的静脉图像。

Due to the difficulties of the copying, vein identification has developed rapidly in recent years. The light source selection directly affects the image quality. This paper acquired by experiment the reflectivities of vein and non vein irradiation with different wavelengths of near infra-red. Comparing the strength of reflectivities of various wave lengths, we found that there were the strongest contrasts between vein and non-vein in the 810 nm, and 810 nm near infra-red was suitable to a vein imaging light source. Finally, clear hand vein images were obtained with the selected light source.