【作者】 陈为民； 徐东霞； 冯维杰； 张立明；

【Author】 Chen Weimin Xu Dongxia Feng Weijie Zhang Liming (Department of Electronic Engineer of Kunming Collage,Kunming,Yunnan,650118)

【机构】 昆明大学电子信息及机械工程系；

【摘要】 增强是指纹图像处理中最重要的方面之一。针对指纹质量的巨大变化,本文提出一种新颖的指纹滤波方法,首先利用一种变形后的离散傅立叶变换估计指纹局部区域的频率,根据指纹不同的区域的主频幅值进行质量评价,然后确定相应区域的指纹滤波器参数进行质量自适应滤波,使不同质量的指纹在滤波后的质量达到一致。试验证明,该方法能够显著提高滤波的质量和鲁棒性。更多还原

【Abstract】 The enhancement is one of the most important aspects in fingerprint image processing.Due to the great change of the quality in the fingerprint image,a novel filtering enhancement is purposed in this paper.First an improved Discrete Fourier Transformation is used to estimate the local frequency of the fingerprint.Then the region quality is evaluated from the amplitude of the local master frequency which determines the parameter of the filter for the quality-adapted enhancement.The qualities of the different area are equalled after the enhancement.The experimental results show that the algorithm performances well and robust.更多还原