虹膜图像预处理算法研究

针对目前已有的虹膜图像预处理算法的局限性，提出了一套新型的虹膜图像预处理算法。此算法对虹膜图像进行了精确的定位，使定位后的虹膜图像具有旋转、平移和尺度的不变性。在完全相同的实验条件下，运用MATLAB软件对104个虹膜图像组成的虹膜数据库进行预处理，本算法只需要7min 50s的运行时间，而当前最流行的Daugman的算法大约需要1h，从而证明了本方法的运行速度约为Daugman方法的8倍，克服了当前流行算法计算量过大的问题。

Research on Iris Image Preprocessing Algorithm

A new kind of iris image preprocessing algorithm was presented to ameliorate the limitation of the existing iris image preprocessing algorithm.The iris was located accurately so that the processed image is invariant for translation,rotation and scale.Under the same experimental condition,104 iris images comprising an iris image database were preprocessed.Our algorithm only costs seven minutes and fifty seconds while the algorithm of Daugman costs about one hour,which proves that the run speed of our algorithm is nearly eight times faster than that of the Daugman's and it can overcome the shortcomings of costly computation that the existing algorithm has.