在数字图像处理中虹膜位置的有效定位是虹膜识别的关键为题。文中的方法速度快、精确高。而且，对瞳孔初始的伪圆心要求不高，鲁棒性更强。-In digital image processing effective iris location positioning is the key to iris recognition as its theme. In this paper, the method is fast, accurate high. Moreover, the initial pseu