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中文摘要：
提出了一种改进的基于梯度的指纹方向场计算方法,主要做了2个方面的工作：深刻分析了归一化对指纹方向场计算结果的影响,提出了一种融合归一化前、后结果的方法;针对已有基于梯度的方向场计算方法存在准确性与抗噪声性矛盾、计算出的方向场结果不连续等缺点,提出了一种改进的计算方向场的窗口模版。实验验证了文中算法的有效性。
英文摘要：
In this paper,an improved gradient based method for the computation of fingerprint orientation fields is proposed.Improved method mainly contains two works： fully analyzing the effects of normalization on the orientation results and proposing a approach for combining the orientation field results of ＇before normalization＇ and ＇after normalization＇ together;for overcoming the conflict between accuracy and noise-robustness,the discontinuity of the orientation results,proposing a new template for the computation of orientation field.Experiments prove the effectiveness of our method.
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Two-dimensional local graph embedding discriminant analysis (2DLGEDA) with its application to face a
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