基于纹理特征的指纹识别算法  

The fingerprint identification arithmetic based on the texture charactres

作　　者：朱凌云[1] 陈少春[1] 

机构地区：[1]东华大学信息科学与技术学院,上海201620

出　　处：《自动化与仪器仪表》2009年第2期11-14,共4页Automation & Instrumentation

摘　　要：基于纹理特征的指纹识别方法,具有计算量小的特点。本文对该指纹识别算法进行了系统研究,提出了一套新颖的方向图修正算法,对于噪声相对较小的情况具有良好的效果。本文对多窗口法求块方向图给出了减少运算量的方法;在方向滤波器设计方面,给出了一个方向滤波器的闭合等式,可以简化方向滤波器设计,大大减少运算量,并取得了较好的增强效果;在中心点求取方面,提出了一种新的粗搜索算法,可以减少计算量,加快中心区域搜索速度。The fingerprint identification arithmetic based on the texture characters is known for its simplicity in calculations. This paper reports a novel fingerprint orientation image modification algorithm, which has good performance in low-noise conditions. We found an effective method for reducing the time of calculations in multi-window algodthm For the discontinuity in the traditional block orientation image, inspired from Gabor function, we put forward a closed equation of directional filter that can not only simplify design of the directional filter, but also greatly reduce the work of computations. Referring to existing algorithm, the process of core point＇s searching reported is divided into two steps-rough searching and fine searching. A new rough search algorithm can also reduce the work of computation and accelerate the process of central region searching.

关 键 词：指纹识别算法 指纹方向图 GABOR滤波器 纹理特征 

分 类 号：TP302.4[自动化与计算机技术—计算机系统结构]