一种基于频域滤波的指纹图像增强算法  

Fingerprint Image Enhancement Based on Frequency Domain Filtering

作　　者：刘卫刚[1] 胡锡梅[1] 王福明[1] 陈晓军[1] 

机构地区：[1]中北大学信息与通信工程学院

出　　处：《可编程控制器与工厂自动化（PLC FA）》2011年第9期71-73,共3页Programmable controller & Factory Automation(PLC & FA)

摘　　要：指纹图像增强在指纹图像预处理过程中有着非常重要的作用,直接影响指纹识别的识别率和识别速度。一般图像增强算法无法满足指纹识别系统的要求,为了提高指纹增强算法的综合性能,现提出一种频率自适应方法以增强指纹图像并有效消除噪声。实验表明,该算法能够使图像的质量明显得到增强,方便了后续指纹特征的提取,以提高指纹识别的算法效率和准确率。Fingerprint Image Enhancement has a very important role in fingerprint image preprocessing and Directly affect the fingerprint recognition rate and recognition speed. General image enhancement algorithms can not meet the requirements of the fingerprint identification system,To improve the overall performance of the fingerprint enhancement algorithm,A frequency adaptive methods are proposed to enhance the fingerprint image and effectively eliminate the noise.Experiments show that the algorithm can make the image quality is clearly growing and Facilitate the follow-up fingerprint feature extraction,fingerprint recognition algorithms to improve the efficiency and accuracy.

关 键 词：指纹识别 傅里叶变换 方向图 滤波器 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]