The Development Of Image Acquisition System For Finger Vein

Biological authentication technology is a kind of new type authentication method, It carries on the authentication of identity according to human body's inherent physiological characteristic or behavior characteristic. Fingerprint recognition is considered as a more comparatively mature technology than the other biological feature recognition such as iris recognition and face recognition, which has well applied in many aspects of our life such as safety fixture, entrance guard, examining system and so on. However, fingerprint recognition has many unavoidable defects, such as overwet, overdrying, cruel skin or contamination of finger that would affect the recognition results. However, the finger vein recognition technology can completely overcome the defects listed above, making the identity authentication easier and faster.These works can't be completed without a set of highspeed multi- function finger vein image acquisition system. Meanwhile image acquisition is the basis of vein image processing, compressing and recognizing, so the research on finger vein Biological authentication image acquisition system is very important and valuable.For the hardware circuit design, the conceptual scheme of image data acquisition system was proposed, and then the principle of image acquisition system was demonstrated. Lastly, this paper expatiated that the main chips used in the acquisition system, the main modules of hardware circuit, the CPLD logic design and the PCB design etc. For the software design, the design scheme of CY7C68013A's firmware was given based on USB2.0 protocol. And the firmware was developed. The design method, developing structure, main program, initial function, and endpoint configure and GPIF design of CY7C68013A firmware program were discussed based on firmware design. The development of WDM driver and the application of the acquisition system were introduced. Lastly, the image data and control orders transferring results between the application and CMOS sensor by USB interface were demonstrated.