【作者】 高鹏；

【导师】 丁晓明；

【作者基本信息】 北京交通大学 ， 信号与信息处理， 2007， 硕士

【摘要】 生物特征识别技术在信息安全方面对设计复杂度和安全性级别两方面的折中提供了很好地解决方案,而二维条形码系统是非网络环境下的高安全性信息载体系统,是一个实现人流、物流和信息流同步的巨型袖珍数据库。因此,生物特征识别技术和二维条码技术都提供了比较高的安全性。目前,无论是生物特征识别技术还是二维条码技术都有了各自长足发展和特定的应用领域。本着交叉学科产生新兴应用的科学态度,本文考察了目前国内外相关技术的发展现状,借鉴相关成功的开发实体,结合自身特点以及可重用设计方法和先进的NiosII软核处理器的优势,在嵌入式平台上开发出能够比较接近于实际应用的“嵌入生物特征的二维条码专用识读系统”。其中生物特征选择方面,我们采用目前在国际上受到广泛重视并且本实验室有较强理论基础的掌纹特征进行本生物特征认证系统的设计。本文的主要工作是在可重用设计思想的指导下,将掌纹特征认证功能与二维条码识读功能在一块已搭建好的SOPC平台上实现融合,从而降低了系统成本,复杂度和功耗。本文的研究重点在两方面:一方面是,使用ALTERA公司最新提出的C2H硬件加速器对掌纹特征预处理的软件程序进行加速处理,更好地提高了系统的实时性能;另一方面,对于以前认证系统出现的对数据库外的数据认证效果不佳的情况,提出了一种基于加权函数的掌纹预处理算法,进一步增强了系统的安全性和稳定性。更多还原

【Abstract】 In information security, biometric feature authentication technology offers a good solution to make balance between complexity of design and level of security. And two-dimentional bar code system is a information carrier system with high security in non-network situation. It is a considerable and portable database that can achieve synchronism in the stream of people, foods and information. Therefore, the biometric feature authentication technology and two-dimentional bar code technology both support high security.At present, not only biometric feature authentication but also two-dimentional bar code has a great development and specific application. With the scientific attitude of finding a new application for the intersect subject, this paper have observed the development of those technology in internal and international and studied the successful develop object. Based on the superiority of reuse methodology and advanced Nios II softcore processor, we design the specific recognition system of two dimentional bar code embedded the biometric feature in the embedded platform. We select the palm feature to do this design, because it is regard as an important issue in international and our lab have a strong theoritical base on it.In the guide of reconstruct technology, this thesis integrated the palm feature authentication and two-dimentional bar code recognition in an existent PCB board to minimize the cost, complexity and power of the system. This thesis have two part of research importance: first, we use the new ALTERA’s C2H acceleration to accelerate the preprocess program of palm feature in order to improve the performance of system. Second, because former system have a bad result in authentication of the datus that is outside of the database, we develop an arithmetic of pre-processing based on weighted-function in palm in order to increase the security and stability of system.更多还原