滤波器参数的选择是指纹图像增强中最为关键的一步。本文根据指纹图像的特性,分别定义了反映指纹脊线局部特征的曲率、对称性和笔直性这三个概念,并在此基础上提出了利用模糊逻辑选择滤波器参数的方法,实验表明了算法的有效性。
The selection of filter's parameter is the most critical step in fingerprint enhancement. In this paper,we define three novel concepts to show the local characters of ridge in fingerprint image. Based on these concepts,we use the fuzzy logic theory to choose the filter's parameters. The result proves the validity of our algorithm.