基于十字方向滤波的指纹图像增强和细化  

The Enhancement and Thinning of Fingerprint Based on a Cross Oriented Filter

作　　者：罗列[1] 司马海峰[2] 

机构地区：[1]东莞理工学院科研处,广东东莞523808 [2]河南理工大学计算机科学与技术学院,河南焦作454000

出　　处：《东莞理工学院学报》2009年第3期5-11,共7页Journal of Dongguan University of Technology

基　　金：国家自然科学基金(60573029;60773050);广东省科技计划(2006B37401001;2007B010200042;2008B060600077);东莞市科技计划(2007108101019;2008108101005);粤港关键领域重点突破项目东莞专项(2007168 106)资助

摘　　要：增强和细化是指纹预处理过程中的重要环节.提出了一种基于十字方向滤波的指纹增强算法,增强过程针对指纹的层次特征,利用十字方向滤波器对纹线边界的粘连现象进行了有效处理,并且修复了纹线中较短的断裂;在此基础上对边缘删减的纹线细化算法作了改进,引入了新的细化模板保护指纹趋势和细节点.实验结果显示,该算法很好地保留了原指纹图像中的细节特征和纹理信息,减少了指纹特征的丢失.The enhancement and thinning are the key issues of the preprocessing of fingerprint images. This paper introduces an enhancement approach based on a cross oriented filter. Towards the hierarchy of fingerprint, the enhancement processes conglutinations effectively by the cross oriented filter, and heals the short broken ridges. Based on the cross oriented filter, we＇ ve improved an edge-cut thinning algorithm and imporeted the new thinning template to protect the trend and minutia of fingerprint. The experimental results demonstrate that it reserves the texture information and the true minutiae of fingerprint, and also decreases the reduction of the fingerprint texture.

关 键 词：纹理特征 十字方向滤波 指纹增强 指纹细化 

分 类 号：TP31[自动化与计算机技术—计算机软件与理论]