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核Fisher鉴别分析在掌纹识别中的应用

, PP. 647-653

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Abstract:

核Fisher的鉴别方法(KFDA)是模式识别中较为突出的提取图像非线性特征的方法。为了更好的提取掌纹图像的非线性特征,将KFDA方法引入到掌纹识别中。首先对掌纹图像做小波变换进行降维,在保留原始图像轮廓信息和特征的基础上,然后进行核Fisher判决方法进行特征提取并引入零空间的核Fisher(ZKFDA)方法解决小样本问题,最后用最小距离分类器进行掌纹匹配。通过PolyU掌纹图像库,实验结果表明,在不同的特征个数下,KFDA方法比二维Fisher准则(2DFLD)方法识别率高;零空间ZKFDA的平均识别率高于KFDA,并且计算量大大减少。在核函数选取上,取RBF核函数的识别性能最佳。

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