基于细节点投影的可撤销指纹模板生成算法  

A Cancelable Fingerprint Template Generating Algorithm Using Minutiae Projection

作　　者：惠妍 张雪锋 HUI Yan;ZHANG Xue-Feng(School of Communication and Information Engineering,Xi'an University of Posts and Telecommunications,Xi'an 710061)

机构地区：[1]西安邮电大学通信与信息工程学院,西安710061

出　　处：《自动化学报》2020年第3期585-593,共9页Acta Automatica Sinica

基　　金：国家自然科学基金(61301091);陕西省自然科学基础研究计划青年项目(2017JQ6010)资助。

摘　　要：为了改善指纹模板保护算法的可撤销性、不可逆性等性能,设计了一种基于细节点投影的可撤销指纹模板生成算法.首先对指纹图像进行预处理,提取指纹的细节点特征,并筛选出采样半径范围内的有效细节点,然后对细节点进行直线投影,将投影后的向量映射到二维网格,生成固定长度的一维比特串,再结合用户PIN码生成可撤销指纹模板.在指纹数据库FVC2002-DB1和DB2上的实验结果表明,该算法不仅提高了指纹模板认证的稳定性,而且在可撤销性、不可逆性和安全性等方面均具有较好性能.In order to enhance the revocation and irreversibility performance of the fingerprint template protection algorithm,a cancelable fingerprint template generating algorithm is proposed using minutiae projection.Firstly,we extract fingerprint minutiae feature after preprocessing the fingerprint image and select the effective minutiae within the range of the sampling radius.Next,we project the minutiae into a line and map the projected vectors onto a 2D grid to generate a fixed length 1D bit-string.Finally,the cancelable fingerprint template is generated by combining the user PIN code.Experiments performed on FVC2002-DB1 and DB2 show that the algorithm not only improves the stability of the template authentication but also satisfies revocation as well as non-invertibility,and ensures the security of the algorithm.

关 键 词：细节点 投影 采样半径 可撤销模板 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP309[自动化与计算机技术—计算机科学与技术]