稳健的虹膜定位算法

Robust Iris Localization Algorithm

虹膜定位是虹膜识别的第一步,同时也是最为关键的一步,它将直接影响整个虹膜识别系统的效率和准确率。针对目前已有虹膜定位算法的局限性,该文提出了一种新的基于多分辨率理论的虹膜定位算法。该算法首先在某一分辨率下搜索虹膜内外缘的边界点,然后针对这些边界点进行椭圆曲线拟合。通过大量的实验表明,该算法快速、准确,并能够在一定程度上解决偏视虹膜图像的定位问题和眼睑、睫毛的遮挡问题。

Iris localization is the most critical step of an iris identification system.Since it determines the accuracy and efficiency of the system.To improve its accuracy and efficiency,we proposed a new iris localization algorithm based on Multi-resolution analysis to detect the edge points of iris at one appropriate resolution and set ellipses to these edge points.The most important merit of this algorithm is that it is seldom affected by lash occlusion problem and can localize the off-angle iris image.