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Characteristic Analysis and Optimization Design of Rectangular Array Light Source for Finger Vein Recognition System |
ZHU Chao-ping1,2,QIN Hua-feng1,2,LIU Qi-neng1,2 |
1. Chongqing Technology and Business University School of Computer Science and Information Engineering,Chongqing 400067, China
2. Detection and Control of Integrated Systems Engineering Laboratory, Chongqing 400067, China |
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Abstract The quality of vein images collected by finger vein recognition system directly affects the recognition efficiency of finger veins,the design of light source of the system influences the quality of finger veins.Aimed at the illumination uniformity of single near-infrared LED is relatively poor, how to design a high-quality light source by taking advantage of the structure, space, shape and other parameters of multiple near-infrared LED is worth studying.By using sparrow's law to find the optimal solution to the extremum of various parameters, and combining the individual differences of fingers and finger shape characteristics, the illumination surface is designed as a 25mm×25mm rectangular light source array, through comparison experiments, the array light source designed with the optimal parameters can collect high-quality finger vein images.By analyzing the light source parameters of rectangular array, a reference for the development of finger vein acquisition equipment is provided and a foundation for the subsequent finger vein image recognition is laid.
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Received: 26 February 2018
Published: 19 December 2019
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