| 1. | Secondly , in the feature extraction stage , haar 2 - d wavelet transform is used in each band of the normalized image . the mean values and variances of the coefficients of 7 main wavelet channels are extracted as features
该算法通过对归一化处理后虹膜图像的各个小分割区域进行二维小波变换,提取出主要小波通道的小波系数均值和方差作为特征值。 |
