基于相位一致性最大响应方向的虹膜识别方法  

Iris recognition based on maximal responding orientation of phase congruency

作　　者：苑玮琦[1] 徐露[1] 林忠华[1] 

机构地区：[1]沈阳工业大学视觉检测技术研究所,辽宁沈阳110178

出　　处：《光学精密工程》2009年第1期179-184,共6页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.60672078);辽宁省自然科学基金资助项目(No.20042028)

摘　　要：为了进一步提高虹膜识别的准确性,提出了一种基于相位一致性最大响应方向的虹膜识别方法。该方法对人眼图像进行图像预处理,得到归一化的虹膜图像;然后,提取像素对于相位一致性的最大响应方向作为可区分性特征,并将最大响应方向的序号编码为简单易处理的二进制虹膜代码;最后,通过计算两个虹膜代码之间的加权汉明距离衡量二者的差异,并给出识别结果。实验结果表明,该方法的等错率为0.871 5%,正确识别率为99.851 8%。与经典的虹膜识别方法相比,该方法具有更高的识别准确性。In order to improve the accuracy of iris recognition further, an iris recognition method based on the maximal responding orientation of phase congruency is proposed. Firstly, the normalized iris images are obtained by preprocessing eye images. Then, the maximal responding orientation of phase congruency for each pixel is extracted and the numbers of maximal responding orientation is encoded into a simple binary iris code that is easy to be processed. Finally, the difference of two iris codes is measured through weighted Hamming distance and the recognition results are given. The experimental results demonstrate that the proposed method has the equal error rate of 0. 871 5% and the correct recognition rate of 99. 851 8%. Compared with the classical methods, the proposed method has a higher accuracy.

关 键 词：生物特征识别 虹膜识别 相位一致性 特征提取 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]