基于Gabor滤波实现过干指纹图像的增强是一种较好的方法，如何估计Gabor滤波器的参数是解决问题的关键。本文采用Radon变换来估计Gabor滤波中的方向和频率，然后进行Gabor滤波增强。通过对FVC2000指纹库中的部分过干的指纹图像进行增强，结果表明，该方法增强效果明显，处理速度较快。

Using Gabor filter to enhance dry fingerprint image is an effective method. The key step is estimating the parameter of Gabor filter. In this paper, the direction and frequency of Gabor filter is estimated by Radon transform, and then fingerprint image is enhanced by the Gabor filter. Experiment results for some dry fingerprint images in FVC2000 fingerprint bases showed that the proposed method can produce effective enhancing with high processing rate.