CASIA OpenIR  > 毕业生  > 硕士学位论文
自动指纹识别技术研究及其应用
段少雄
Subtype工学硕士
Thesis Advisor田捷
2002-05-01
Degree Grantor中国科学院研究生院
Place of Conferral中国科学院自动化研究所
Degree Discipline模式识别与智能系统
Keyword身份认证 生物识别技术 自动指纹识别技术 非线性形变 细节点 指纹匹配 Afis Personal Identificatiion Biometric Afis Minutia Matching Nonlinear Deformation
Abstract身份认证在当今社会中可谓是无处不在,传统的身份认证方法因为其本身的 缺陷,其加密强度和使用方便性都越来越不能满足现代社会的需求。随着计算机 技术和生物识别技术的发展,生物识别技术逐渐发展进入到实用阶段,并且有了 一定程度的应用,而自动指纹识别技术又在众多生物识别技术中脱颖而出。 目前已有很多种自动指纹识别算法,指纹图像的非线性形变一直是影响识别 准确性的一个重要因素,虽然人们已经提出很多种方法来解决这个问题,但都有 其局限性。经过大量实验我们发现指纹图像中局部邻域内的细节点之间是相对不 变的,这样我们不仅仅将孤立的细节点作为特征进行匹配,而且利用其周围的其 他细节点作进一步的校正,在实验室原有的研究基础上提出了一种改进的自动指 纹识别算法,实验证明该算法能有效地提高识别的准确性。同时,针对图像预处 理部分处理速度慢,无法满足实时要求的现象,我们提出了一种快速的指纹图像 增强算法,将增强中的方向场离散化,在准确性和速度上进行折中,使系统能满 足安全性和实时的要求。 同时,我们和相关公司合作,结合市场需求,成功地实现技术转移,将自动 指纹识别系统(Automated Fingerprint Identification System,简称AFIS)应用到 考勤系统和WINDOWS 2000登录系统中,实现自动指纹考勤系统和自动指纹登 录系统,为用户提供方便安全的身份认证方法。
Other AbstractA personal identification is needed in a wide range of application domains. Fingerprint identification, as one of biometric technologies, is being widely used in forensics and civilian application areas. It has attracted more and more researchers' attention because it is more reliable relative to traditional methods such as ID and passwords. In this paper, we proposed a minutia matching algorithm which modified Jain et al.'s algorithm. Not the minutiae themselves but those around them are used to compose feature vectors, so our algorithm can better distinguish two images from different fingers and is more robust to nonlinear deformation. Further more, we introduce a enhancement method which is more faster, so our AFIS(Automated Fingerprint Identification System) can be used in real-time system. We had designed some fingerprint-based biometric system such as system for checking on work attendance and WINDOWS logon system.
shelfnumXWLW636
Other Identifier636
Language中文
Document Type学位论文
Identifierhttp://ir.ia.ac.cn/handle/173211/6784
Collection毕业生_硕士学位论文
Recommended Citation
GB/T 7714
段少雄. 自动指纹识别技术研究及其应用[D]. 中国科学院自动化研究所. 中国科学院研究生院,2002.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[段少雄]'s Articles
Baidu academic
Similar articles in Baidu academic
[段少雄]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[段少雄]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.