Gabor滤波器参数设计及其在虹膜识别中的应用*

利用二维Gabor滤波器组编码虹膜纹理的方法,已被广泛地应用于虹膜识别中。该方法的关键是滤波器组的参数设计，直接影响着识别准确率。深入分析了二维Gabor滤波器各参数的作用，提出了一种适用于虹膜纹理特征提取的Gabor滤波器参数设计方法。该方法根据理论分析建立起参数间的关系，借助傅里叶变换和频谱分析确定参数取值。实验证明，依据该方法设计的滤波器组用于虹膜识别，效果好、识别率高。

Gabor filter parameters design its use in iris recognition

It was widely applied in iris recognition that using Gabor filter coded iris feature. The key of this method was designing the Gabor filter parameters. It directly affect accuracy. This paper studied the effect of the parameters of Gabor filter in iris feature extraction, proposed a measure for parameters designing. This approach related the parameters one to other, then selected them basis of FFT and their relation. Applied the Gabor filters designed by this method to iris feature extraction, experimental results show that it can extract effectively the characteristics of iris texture for iris recognition and has high accuracy.