| At present, with the continuous development of fingerprint recognition technology, it has slowly become the most mature biometric technologies. Currently it is exploring the direction of miniaturization and embedded development. This article studies based on the embedded knowledge, image pre-processing and other aspects of the theory of knowledge,and then it has developed a small embedded identification system On the basis of these knowledge.According to the function of the identification system , this article discussed the function of the related fingerprint identification system hardware design,and designed hardware circuit design based on stm32f103vbt6 microprocessor system of fingerprint identification equipment and software design. The system has the fingerprint image acquisition, the number of statistics in the fingerprint database, fingerprint matching, and other functions. In addition, electrical parts in this article on the price and performance has certain advantages.At the same time, this process of fingerprint identification system and related principles must be analyzed and studied, especially fingerprint image preprocessing.First of all, the original image was normalized,and It presents a partial segmentation of the normalized variance of the image segmentation. This method has been relatively good results .Then,it used fourier transform to achieve fingerprint enhancement after using the block pattern on the image.And then, the processed binary image was emoved noise by the binarization.Finally, we would To complete the image of the refinement using an improved OPTA thinning algorithm which was proposed by Feng Xingkui and so on.It also introduces the button procedures , display and other related procedures in the last this paper, as well as introduces that the system is connected with the PC, and the function of the PC software interface. At the end of the system is also verified by experiment feasibility. The design of the identification system still needs further exploration and research. Finally, the paper also summarized, and prospects for future research. |
