一篇主要介绍使用变量水平集方法进行虹膜分割的文章，之后也有其相应的归一化算法介绍以及特征提取及少部分的虹膜匹配-Introduced a level set method using the variable iris segmentation article, and then there are the corresponding normalization algorithm descr iption and a small number of feature extraction and