手指静脉装置的光源优化设计及应用

Optimization Design and Application of Near Infrared Light Source for Finger Vein Device

为了提高手指静脉的识别率,首先需要提高手指静脉图像的质量,影响图像质量的关键因素是手指静脉采集设备,而采集装置的近红外LED光源系统直接决定手指静脉成像的质量;提出一种近红外LED阵列等边三角形排列的光源设计方法,优化三角形阵列的结构参数;实验结果表明:采集的手指静脉图像质量提高,有助于提升手指静脉识别图像的识别率。

In order to improve the recognition rate of finger vein,the quality of the finger vein image needs to be improved first.The key factor affecting the image quality is the finger vein collection equipment,and the near-infrared LED light source system of the collection device directly determines the quality of the finger vein imaging.However,the shape and internal structure of the human fingers are different,and the structural parameters are different.If the design of the device’s near-infrared light source is unreasonable and if the structural parameters of the light source array are incorrect,it is impossible to collect the details and features inside the finger vein,which results in a decrease in the recognition rate of the finger vein.This paper proposes a light source design method for equilateral triangle arrangement of near-infrared LED arrays to optimize the structural parameters of the triangle array.The experimental results show that the improving of the quality of the collected finger vein images can help improve the recognition rate of the finger vein images identifying.