基于感兴趣区域的快速虹膜定位方法  

A fast iris localization method based on interesting filed

作　　者：王博凯[1] 杨淑莹[1] 王光彪[1] 冯帆[1] 贾紫娟[1] 

机构地区：[1]天津理工大学计算机与通信工程学院,天津300384

出　　处：《天津理工大学学报》2012年第4期24-27,共4页Journal of Tianjin University of Technology

摘　　要：虹膜定位是虹膜识别系统中的一个非常重要的步骤,虹膜识别系统性能的优劣很大程度上取决于虹膜定位的精确性和快速性.针对已有的虹膜定位算法存在的定位精度和执行效率低并且鲁棒性差的缺点,本文提出一种基于感兴趣区域的快速虹膜定位算法,本算法主要有两个基本步骤:虹膜边缘点检测和用霍夫变换拟合虹膜边界.在进行这两个步骤之前,我们定义了一个感兴趣区域IF(Interesting Filed),这个感兴趣区域为一个包含虹膜的外接矩形.通过寻找感兴趣区域,我们缩小了对目标的搜索范围,使得霍夫变换能较快的对虹膜进行定位.经试验表明本算法能较为精确且快速的定位虹膜边界.Iris localization is a very important step in iris recognition system, and the performance of the system depends on the accuracy and the fast of the localization in large extend. Face to the lower localization accuracy and long time of classical method, in this paper we proposed a fast iris localization method base on IF （ Interesting Filed）. This method mainly concludes two steps ： edge point detection of the iris and use Hough transform to simulate the iris edge. We define an IF before applying these step, this IF is a rectangle area which covers the whole iris filed. We reduce the searching area through the IF, so we can use the Hough transform to locate the iris. The experiment expresses that our method can locate the iris edge more accuracy and faster.

关 键 词：虹膜定位 霍夫变换 虹膜边界 生物特征 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]