基于Gabor滤波的指纹图像增强算法  

Fingerprint Image Enhancement Algorithm Based on Gabor Filter

作　　者：陈静[1] 罗斌[1] 詹小四[2] 

机构地区：[1]安徽大学计算机科学与技术学院,安徽合肥230039 [2]阜阳师范学院计算机系,安徽阜阳236041

出　　处：《计算机技术与发展》2008年第4期124-126,164,共4页Computer Technology and Development

基　　金：安徽省教育科研基金资助项目(2005KJ089)

摘　　要：由于指纹的唯一性和不变性,指纹识别已成为当前最流行、最方便、最可靠的个人身份认证技术之一。指纹识别一般包括指纹采集、图像预处理、特征提取及特征匹配等几个步骤。其中图像预处理中的图像增强是最为关键的环节,直接影响特征提取与特征匹配。提出了一种基于Gabor滤波的指纹图像增强算法。阐述了Gabor滤波器的定义及其在指纹图像增强中的应用。对指纹图像方向图提取方法和频率计算方法作了改进尝试。实践表明,该方法是有效的、实用的。Because of uniqueness and invariability, the fingerprint identification is becoming one of the most popular personal authentication technologies,and many fingerprint products have been offered nowadays. Fingerprint identification includes fingerprint image capture, image pretreatment,minutia extraction, minutia matching, etc. A critical step is the fingerprim enhancement that affects the process of minutia extraction and minutia extraction directly. A fingerprint image enhancement based on Gabor filter is presented in this paper. The Gabor filter is defined and its appliction process in the fingerprint enhanment are described. The methods for ridge orientation acquirement and ridge frequency acquirement of fingerprint image are improved. Experimental results show that it is feasible and practical for fingerprint processing.

关 键 词：指纹增强 GABOR滤波器 纹线方向 纹线频率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]