由于对拒真率、认假率、比对时间、模板占用空间等指标都有较严格的要求,指纹验证是一项复杂且具有挑战性的任务。提出了复合方向特征这一新颖的特征用于指纹验证,该特征由脊线旋转方向和4个相对方向组成。指纹验证由两个过程组成:基于复合方向特征的细节点对搜索,它加速了指纹校准;基于复合方向特征的匹配分值计算,它使匹配的鲁棒性增强。用国际指纹验证大赛指纹库中的测试样本进行了测试,实验结果表明,该方法能够实现可靠、快速的指纹验证。

Because of high restriction on False Reject Rate,False Accept Rate,computational time cost and template size,fingerprint verification is a challenging task.A novel feature named complex direction feature is proposed in this paper,which consists of ridge rotation direction and four local relative directions.The fingerprint verification consists of two stages: complex direction feature based minutiae alignment,which speeds up alignment;matching score calculation by complex direction feature,which makes matching more robust.Experiments were performed on the fingerprint database used by Fingerprint Verification Competition,and the experimental results show that the proposed algorithm can achieve reliable and fast fingerprint verification.