中文说明：虹膜识别中的特征提取算法：2D-Gabor滤波器算法，将归一化的虹膜图像由此滤波器滤波，可以得到二进制的特征编码。附图片。
English Description：
The feature extraction algorithm in iris recognition: 2D Gabor filter algorithm. The normalized iris image is filtered by this filter, and the binary feature coding can be obtained. Picture attached.