关键词: 指纹识别, 指纹增强, Gabor滤波器, 自适应模板大小

Abstract: In Gabor method，the enhancement mask size is constant for a fingerprint impression.This may lead to the changing of ridge structure in the blocks where ridge direction varies significantly.A new method using adaptive mask size is proposed.Larger mask size will be used when ridge direction varies less.Experimental results show that the proposed method is more effective to improve the clarity of ridge and valley structure.This paper conducts the experiments on 3 databases of FVC 2004 and the ROC curves indicate that the accuracy of fingerprint system will be improved when the method is introduced.

Key words: fingerprint recognition, fingerprint enhancement, Gabor filters, adaptive mask size