An estimation method of fingerprint ridge distance based on ridge orientation projection signal spectrum analysis is proposed to overcome some shortages in the present literatures.
提出了一种基于纹线方向投影信号谱分析的指纹纹线间距估计方法。
We also improve on the binarization method of fingerprint images based on the 2~(nd) derivative by the orientation and ridge frequency of the images.
在方向图和脊线频率的基础上，实现了基于二阶导数的指纹图像二值化算法；
We also improve on the binarization method of fingerprint images based on the 2nd derivative by the orientation and ridge frequency of the images.
在方向图和脊线频率的基础上，实现了一种基于脊线方向分析的方法对指纹图象进行二值化；
We also improve on the binarization method of fingerprint images based on the 2nd derivative by the orientation and ridge frequency of the images.
在方向图和脊线频率的基础上，实现了一种基于脊线方向分析的方法对指纹图象进行二值化；
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