摘要： 提出了一种两步增强指纹奇异点区的新方法。使用基于瑞利函数的滤波器对奇异点区进行带通滤波，使用间隔22.5˚的8方向加博滤波器组对该区域进行增强，在获得的8幅滤波图像上，通过计算质量指标，得到对应于16个方向子区的16幅最优子区图像，合成这些子区图像，得到最终的奇异点区增强结果。实验结果表明该方法有效增强了指纹的奇异点区。

关键词: 指纹, 指纹增强, 奇异点, 瑞利函数, 加博滤波器

Abstract: This paper presents a novel method, which is called two-step enhancement method to enhance the singular point area in the fingerprint image. First of all, a filter, based Rayleigh function, is applied to the area for band filtering, and next, it uses eight direction Gabor filters with interval 22.5 degree to enhance this area respectively. The optimum sixteen directional subdomains images, which come from the eight filtered images, can be obtained by using quality index. Finally, it gets the fingerprint enhancement image of the singular point area through synthesizing these subdomains images. Experimental results show an effective enhancement in the singular point area.

Key words: Fingerprint, Fingerprint enhancement, Singular point, Rayleigh function, Gabor filter

中图分类号: 

• TP 311