Firstly, a gradient operator based on local standard deviation is performed and potential edge regions are well separated.
首先提出了一种基于标准差的梯度算子，将图像中潜在的边缘区域很好地区分出来；
The LBP16, 4 operator is used to extract iris texture features, and the parameter of improved standard deviation of offset means is constructed for iris matching.
该方法使用LBP16, 4算子来提取虹膜的纹理特征，并构造了改进的移位均值标准差参数进行匹配。
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