基于改进主动轮廓线的虹膜定位方法  

Improved algorithm for iris location based on active contour

作　　者：王中旭[1] 李伟生[1] 

机构地区：[1]重庆邮电大学计算机科学与技术学院,重庆400065

出　　处：《计算机工程与设计》2009年第16期3840-3842,3878,共4页Computer Engineering and Design

基　　金：重庆市自然科学基金项目(2006BB2365)

摘　　要：针对传统的Snake模型对初始位置敏感,需要依赖其它机制将主动轮廓线的蛇点放置在图像目标附近,导致弱边界图像求解效果较差的问题,应用改进的能量函数Snake模型,均匀地对蛇点进行搜索,在搜索中逐渐加大内部能量函数的调整,经过迭代,使得各蛇点的轮廓逐渐逼近目标轮廓,直到其到达虹膜的边界。实验结果表明了该方法的有效性。Aim at the problem that traditional snake model is sensitive to the initial position and needs to rely on other mechanisms to locate snake points of the active contour in the vicinity ofthe target image resulting in effect of a weak boundary image is very pool, snake model improved energy function is applied. This energy function can equably search snake points. In the searching process, adjustment of internal energy function is increased gradually, every snake point contour approaching to the target contour by iteration tmtil contour arrive to the boundary of iris. The exoerimental results show that this method is effective for iris localizatinn

关 键 词：主动轮廓线模型 虹膜定位 能量函数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]