中文说明：虹膜识别中的边缘定位方法：使用边缘跟踪定位法找到边界点，再使用最小二乘圆拟合法得到坐标值，附图片。
English Description：
The edge location method in iris recognition: use the edge tracking location method to find the boundary point, and then use the least square circle fitting method to get the coordinate value, with pictures.