关键词: 手指静脉识别, 图像采集, 多光谱成像, 串口通信

Abstract:

The development of finger-vein recognition technology creates the need of the multispectral finger-vein image acquisition. In multispectral finger-vein image acquisition system,the near infrared (NIR)light control circuit and the spatial structure of NIR light source are two important hardware parts for obtaining proper luminance energy. In this paper,we propose a new strategy to improve our previous multispectral finger-vein imaging system. Firstly,the NIR light control circuit is redesigned considering the convenience of interaction between the NIR light control chip and the computer. Then,in order to approximately obtain a line NIR light source,the spatial structure of the NIR light is redesigned. Based on these two improvements,a new imaging device is made for capturing multispectral finger-vein images. The experimental results show that the proposed imaging system is effective and reliable for multispectral finger-vein image acquisition with high quality.

Key words: finger-vein recognition, image acquisition, multispectral imaging, serial communication