快速的多级指纹混合匹配方法

Fast Multi-Stage Hybrid Fingerprint Matching

提出一种快速的多级指纹混合匹配方法.该方法在提取指纹图像特征,建立指纹细节点匹配模板后,对指纹进行多级匹配.首先,计算两幅指纹图像特征矢量之间的欧式距离,通过比较距离大小实现指纹的初级比对.然后利用输入指纹与库指纹的细节点模板进行二次匹配.最后,对二次匹配过程中匹配的细节点对加以分析,选取可靠的细节点对作为多参照对应点进行再次匹配.该方法融合指纹的图像特征和细节点特征,避免建立指纹细节点对应性耗时的搜索过程,同时多参照点的引入可以更好地校准细节点集.实验证明该方法快速有效.

A hybrid multi-stage fingerprint matching method is proposed. After the extraction of the image features and the construction of the fingerprint minutiae pattern, a multi-stage fingerprint matching procedure is performed. Firstly, the Euclidean distance between the two corresponding image features is calculated and the preliminary matching is realized by comparing the Euclidean distance. Then, the query minutiae pattern with the template minutiae pattern are directly matched at the second matching stage. Finally, further matching is carried out using multiple pairs of reference minutiae obtained at the second stage. Experimental results indicate that the proposed multi-stage matching method is fast and effective.