一种新的虹膜定位方法

A New Iris Location Method

针对现有虹膜定位算法的局限性,提出了一种新的虹膜定位的方法.先对虹膜图像进行预处理,用canny边缘检测算子检测得到虹膜内边缘;再通过二次canny边缘检测对虹膜外边缘进行粗定位,然后分小区域对虹膜外边缘实现多阈值边缘检测,从而获得真实边缘,再利用虹膜内外边缘之间的耦合关系,结合最小二乘法实现虹膜外边缘的定位.实验结果表明,此方法能比较快速准确地定位出虹膜的内外边缘.

Aiming at the localization of iris location algorithm, a new iris location algorithm is presented. Firstly, the image is pre-processed, the inner edge of the iris image is detected by canny operator; the coarse outer location is acquired by the second canny operator, then the image is divided into many small areas based on it, the real outer edge is detected by the small areas and values. Using the coupling relationship between the inner and outer edges of the iris image and least square method, the outer edge of the iris image is located. The result shows that this method can be located the iris edges quickly and accurately.