中文摘要：

在虹膜识别过程中虹膜定位占有很重要的地位,快速精确地定位为虹膜识别提供有效保障。根据虹膜形状特性为近似圆环状,提出一种快速有效的虹膜定位算法。首先对虹膜图像进行灰度数学形态学操作,其次根据操作后图像的灰度直方图对其进行二值化处理,然后再进行一次二值图像形态学处理,最后对其边缘检测后利用Hough变换圆检测定位虹膜内外边缘,得到内外圆的圆心与半径。通过Matlab进行仿真实验验证,算法可行与有效。

英文摘要：

The localization of iris is very important in the process of iris recognition,fast and precise localization can provide security for iris recognition.According to the characteristics of iris is approximately circular shape,an fast and effective algorithm of iris location.Firstly,the iris image grey scale mathematical morphology is processed,secondly,according to the above operation,the image gray-level histogram is processed with the binaryzation method,then mathematics morphology method is used again for the binaried image,finally,using the Hough transform circle detection locates the inside and outside edge of the iris image,the circle center and the radius of the iris are drawn.Experimental verification by Matlab,the algorithm is feasible and effective.