Abstract: In this paper，the authors study and realize the algorithm of fingerprint enhancement utilizing Gabor filter.The algorithm improves the extraction method of orientation map of fingerprint image and the frequency of ridges.Meanwhile，the fast realization approach of Gabor filters is studied as well.Firstly，the Gabor filters are decomposed into the combination of a number of one-dimensional Gaussian filters which have different parameters in different directions，and subsequently realize these Gaussian filters respectively using recursive method.And finally the application of the fast algorithm of Gabor filters in fingerprint image enhancement is achieved.Experimental results indicate that this method for fingerprint image enhancement can improve the quality of input images quickly and efficiently.

摘要： 研究并实现了利用Gabor滤波器对指纹图像增强的算法。改进了指纹图像方向图和纹线频率的提取方法，同时也对Gabor滤波器的快速实现方法进行研究，首先把Gabor滤波器分解为多个不同方向上有着不同参数的一维高斯滤波器的组合，然后通过递归的方法分别实现这些高斯滤波器，最后实现了Gabor滤波器的快速算法在指纹图像增强中的应用。实践表明，该方法效果良好，速度快，能大幅度提高指纹图像质量。