摘要
算法采用按方向计算的灰度曲率,并将它归一化后用来作为衡量块内方向是否一致的标准,并通过此参数和指纹图像的平均频率共同调节滤波窗口的大小.实验结果表明,该方法不仅可以很好的消除粘连和连接断线,而且可以缓解因方向图求取不准确而对图像增强造成的不利影响,同时还增加了滤波器本身的稳定性和适用性.
Algorithm calculates the gray curvature based on the directional image,and then normalizes it to range 0-1 as the stardand of direction consistency by which and average fingerprint ridges frequcy the window size of Gabor filter is adjusted. The experiment proves that, this algorithm can not only improve the joint of faulted ridges and separation of accretionary ridges, but also enhance the stability and applicability.
出处
《计算机系统应用》
2013年第6期102-104,共3页
Computer Systems & Applications
