For the normalized iris texture images, if we find a effective way to extract their characters, then we can classify the iris images.
对于提取出来的虹膜纹理图像，如果能够找到一种有效提取虹膜纹理部分特征的方法就能够完成虹膜纹理图像的分类。
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。
Detect iris edge to extract points on the boundaries by pixel gradient.
接着利用梯度和搜索虹膜外边界的边界点。
Detect iris edge to extract points on the boundaries by pixel gradient.
接着利用梯度和搜索虹膜外边界的边界点。
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