本代码是利用灰度极小值的方法成功完成了虹膜瞳孔定位，并利用线性差值法对虹膜进行归一化处理，归一化的目的是方便对图像的进一步处理。-This code is the use of gray minimum method successfully completed the pupil, location, and linear differential method is used to analyse the iris normalization processing, the purpose