基于斐波那契数列的指纹增强方向滤波模板  

Directional Filter Masks for Fingerprint Enhancement Based on Fibonacci Sequences

作　　者：蔡秀梅[1] 范九伦[2] 高新波[1] 

机构地区：[1]西安电子科技大学电子工程学院,西安710071 [2]西安邮电学院通信与信息工程学院,西安710121

出　　处：《模式识别与人工智能》2011年第3期360-367,共8页Pattern Recognition and Artificial Intelligence

基　　金：国家自然科学基金项目(No.60572133);陕西省自然科学基础研究计划(No.2007F18);陕西省教育厅专项科研计划项目(No.11JK0911);西安邮电学院中青年基金项目(No.2L2009-2)资助

摘　　要：目前采用的方向滤波模板参数凭经验或由实验确定,模板在旋转过程中会发生溢出现象,这在一定程度上破坏了参数在对应模板方向上的分布规律.鉴于此,文中一方面将基本模板尺寸扩展来解决模板溢出问题,确保参数在对应模板方向上的分布规律;另一方面采用著名的斐波那契数列来确定方向滤波模板的参数,降低人为因素的影响.大量实验表明,用文中设计的模板对指纹图像进行滤波增强,能更好地连接断裂的脊线,并能有效地断开脊线之间的粘连,消除噪声.The coefficients of the filter masks are often determined experientially or experimentally. Some of the filter coefficients are beyond the range of the mask after rotation, which destroys the distributed regularity of the coefficients. Aiming at this problem, the size of the filter mask is expanded to resolve the problem of overflow with coefficients distributed regularity maintained. On the other hand, a section of the famous Fibonaeci sequence is ehosen as the coefficients to reduce the influence of human factors. The experimental results show that this direetional filter mask works more effeetively than the existing procedures. Moreover, it eonneets the breaks and separates conglutinated ridges simultaneously.

关 键 词：指纹增强 方向滤波 斐波那契数列 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]