摘要： 提出了改进型指纹点方向图计算方法,设计了基于方向图的分离模板以实现灰度图像的方向性滤波,并采用数学形态学的方法进行二值指纹图的滤波操作。实验表明,用该方法进行图像预处理,能大大减少指纹图像中的伪结构,有利于后续的指纹特征抽取和识别。

关键词: 指纹图像, 预处理, 方向图, 滤波

Abstract: In this paper, some novel methods for direction map calculating, greyscale fingerprint image filtering based on direction template and binary image filtering based on mathmatical morphology method are proposed. Experiments show that the suggested approach can greatly reduce the noises and pseudo-structures, and hence is helpful for the feature extraction and fingerprint identification.

中图分类号: 

• TP391.4