摘要
对基于Hough变换圆检测的人眼定位方法进行了改进,借助积分投影定位人眼坐标时求得的灰度特征值,给出了一种快捷准确的眼睛定位方法。采用基于灰度积分投影的方法粗定位人眼,求得大致的虹膜半径、中心坐标和虹膜区域等;再采用"最小外接矩形法"估算待检测圆的圆心及半径,运用Hough变换检测圆的方法精确检测出虹膜。在VPM642实验平台上,使用C语言进行了编程实现。实验结果表明,该人眼定位方法有很好的检测效果,人眼定位精度达到93.5%。
Through making an improvement of the eye location method based on the Hough transformation circle examination and obtai-ning the gradation characteristic value by using the integral projection,the paper has given a quick and accurate eye location method.First,the human eye is roughly located by using the gradation integral projection method,so that the iris radius,the central coordinate and the iris region are approximately determined;And then the center and the radius of the circle to be examined are estimated by using the ＂the minimum external connection rectangle approach＂ and the iris is precisely located by the circle examination of the Hough trans-formation.On the VPM642 platform,C language is used to realize the programming.The experiment indicates that this eye location method has the very good examination effect,and the eye location accuracy achieves 93.5%.
出处
《计算机工程与设计》
CSCD
北大核心
2011年第4期1359-1362,共4页
Computer Engineering and Design
基金
辽宁"百千万人才工程"培养基金项目(2009921090)
关键词
积分投影
人眼定位
虹膜检测
HOUGH变换
最小外接矩形法
integral projection
eye location
iris detection
Hough transform
minimum external connection rectangle approach
