摘要
指纹增强对提高细节特征提取的准确率乃至整个自动指纹识别系统的性能实现都具有重要的意义。首次将中值滤波算法运用于指纹图像增强方面,提出了一种更为简单的指纹图像增强算法。该算法的主要过程是:对图像中的每个像素点,沿该点方向上取一个(2R+1)的一维统计窗口,其中R为该统计窗口的半径。对该窗口进行中值滤波,并将中值结果赋予该像素点。通过针对FVC 2002指纹库进行实验表明,该方法是一种简单、有效的指纹图像增强算法。
Fingerprint enhancement is important for improving the accuracy of minutia extraction, even for the total Automated Fingerprint Identification System （AFIS）. In this paper, median filter method is applied to fingerprint image enhancement for the first time,and a more simple fingerprint image enhancement method is proposed. The main processing is： for each current point in fingerprint image, a statistical window of one dimension with（2R＋ 1 ） in size is gained, here R is the radius of the window, then the median filter is operated on this window, the current point with the result of the median filter is reset. The experimental result based on FVC2002 shows the proposed method is a simple,effective fingerprint image enhancement algorithm.
出处
《现代电子技术》
2009年第10期107-109,115,共4页
Modern Electronics Technique
