改进的指纹图像预处理在指纹识别中的应用  

Application of improved preprocessing for fingerprint image in fingerprint recognition

作　　者：吴健辉[1] 许磊[2] 杨坤涛[1] 蒋冰莉[1] 

机构地区：[1]华中科技大学光电子科学与工程学院 [2]郑州牧业工程高等专科学校信息工程系,河南郑州450011

出　　处：《计算机工程与设计》2008年第8期1983-1986,共4页Computer Engineering and Design

摘　　要：指纹图像的预处理在计算机指纹自动识别系统(AFIS)中有着非常重要的作用,直接制约着系统的识别率和识别速度。在总结现有常用预处理算法的基础上,结合指纹图像的特点,通过实验提出并实现了一些改进的预处理算法,即先计算出指纹的脊线方向,然后将脊线方向应用到预处理的各个算法中。结果表明,基于脊线方向的预处理算法能明显改善指纹图像的处理效果,可以很好的提高指纹图像的质量,在同样的特征提取算法和匹配条件下,改进的预处理方法的识别率高于传统方法。The preprocessing of the fingerprint image has the very important using in computer automated fingerprint identification system （AFIS）, it is directly restricting the system recognition rate and speed. Based on the often using algorithms, union the characteristic of fingerprint image, some improvement ofpreprocessing algorithms by experience is put forward. First the ridge direction of fingerprint is calculated and then is used in every algorithm for preprocessing. The result of experiment showed that based on ridge direction of preprocessing have the evidence effect for fingerprint image processing, which can improve the quality of fingerprint image. In the same condition for characteristic extraction and matching, the recognition rate is higher than tradition.

关 键 词：指纹识别 预处理 特征提取 细节匹配 改进算法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]