Fingerprint Guard System Of Intelligent Buildings

Today, it has been more convenience than before in informatization world, followed with many information security risks. The traditional identification methods have faced more and more challenges, while the fingerprint identification has gotten a great development as a reliable and highly feasible biometric identification technology. The research of the fingerprint identification technology has great important in practice and theory. Now, it has been applied in many fields such as justice, public security and security systems and so on.The design of fingerprint identification system has been introduced in this paper, and we emphasized on the hardware and algorithm design and the key algorithm has been improved.Firstly, different kinds of biometric identification technology have been introduced. And the development of fingerprint identification technology has also been presented in detail. Furthermore, the way of development in fingerprint identification technology has been pointed outSecondly, after introducing the minutia and texture characters, the advantages and the disadvantages of two fingerprint identification technology, the performance standards and the flow chart of AFIS had been presented in this paperThirdly, this paper advanced a hardware design of fingerprint identification system based on TMS320VC5509A. And the system contains some modules such as fingerprint acquisition, fingerprint data process, CPLD as interface, memory extension, power supply and CANBUS.In additionally, some research had been carried on the fingerprint identification arithmetic based on the texture characters, as following:1. Because of the discontinuity in the traditional block orientation image, we present a new fingerprint orientation image modification algorithm which has good performance in the low-noise condition. And a method for multi-window algorithm is effective in reducing the time of calculation.2. Inspired from Gabor function, we give out a closed equation of directional filter which can not only simplify design of the directional filter, but also greatly reduce the amount of computation. The results showed that this method is effective. 3. Referring to existing algorithm, the process of core point's searching is divided into two steps—rough searching and fine searching. A new rough search algorithm can also reduce the amount of computation and accelerate the process of central region searching.Finally, some feasible suggestion for the shortcomings of fingerprint identification algorithm has been put forward.