一种指纹纹线距离估计算法  

An Algorithm for Fingerprint Ridge Distance Estimation

作　　者：任春晓[1] 尹义龙[1] 马军[1] 詹小四[1] 

机构地区：[1]山东大学计算机科学与技术学院,济南250101

出　　处：《模式识别与人工智能》2009年第4期554-559,共6页Pattern Recognition and Artificial Intelligence

基　　金：国家自然科学基金项目(No.60403010);山东省高新技术自主创新工程专项(No.2007ZCB01030);山东省自然科学基金重点项目(No.Z2008G05)资助

摘　　要：指纹图像的平均纹线距离是指纹纹理属性的一个重要特征.作为一个重要的参数,平均纹线距离的估计精度可能对分割、增强和分类结果造成严重影响.文中提出一种指纹图像平均纹线距离估计算法.通过使用傅立叶变换、熵和加权欧氏距离等方法实现对平均纹线距离的精确估计.为评价算法性能,提出使用人工数据集和典型指纹图像对算法进行测试的实验方案.实验结果表明,本文算法可以对指纹平均纹线距离实现精确估计.The average ridge distance of a fingerprint image is an important characteristic of fingerprint texture attribute. As an important parameter, the precision of estimation seriously affects the results of segmentation, enhancement and classification of fingerprint recognition. An algorithm is proposed to compute the average ridge distance of fingerprint accurately by using discrete Fourier transform, discrete information entropy theory, and weighted Euclidean distance. To evaluate the performance of the proposed algorithm, an experimental scheme is put forward based on man-made experimental datasets and typical fingerprint images. The experimental results show that the proposed algorithm estimates the average ridge distance accurately.

关 键 词：指纹识别 纹线距离 傅立叶变换 熵 加权欧氏距离 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]