| 一种基于点方向和块方向的指纹方向信息提取方法 |
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| 引用本文： | 闵晶妍,阮海容.一种基于点方向和块方向的指纹方向信息提取方法[J].襄樊学院学报,2008,29(2). |
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| 作者姓名： | 闵晶妍 阮海容 |
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| 作者单位： | 襄樊学院物理与电子信息技术系 襄樊学院物理与电子信息技术系 湖北襄樊 湖北襄樊 |
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| 摘 要： | 结合指纹图像点方向和块方向给出一种点块结合的指纹图像方向信息提取方法.对指纹图像分块,对块中的每一点利用点方向法求出该点的方向,统计该块八个方向中每个方向上像素点的个数以确定本块的块方向,该方向即是指纹纹线的走向、块的中心点像素的方向.鉴于文中述及的计算点方向的算法相对简单,提高了算法的运行速度;同时,采用点块方向结合的处理方法,对于方向信息的突变也能进行较好地提取,去噪能力更强,提取方向更准确.实验表明,与点、块方向法相比,该方法所求方向的错误率及噪声点对所求方向的干扰概率均大大减小,平均比点方向法降低了87.8%,比块方向法降低87.4%,对原始指纹的质量要求不高,鲁棒性更强.
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| 关 键 词： | 指纹图像 点方向 块方向 方向信息 |
A New Fingerprint Direction Extracting Method Based on Point Direction and Block Direction |
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| MIN Jing-yan,RUAN Hai-rong.A New Fingerprint Direction Extracting Method Based on Point Direction and Block Direction[J].Journal of Xiangfan University,2008,29(2). |
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| Authors: | MIN Jing-yan RUAN Hai-rong |
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| Institution: | MIN Jing-yan; RUAN Hai-rong(Department of Physics & Electronic Information Technology; Xiang Fan University; Hubei 441053); |
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| Abstract: | A new fingerprint image direction extracting method based on point direction and block direction of fingerprint image is presented in this paper.The fingerprint image is blocked and the direction is obtained using the point direction method.The speed is improved because the algorithm of point direction is simple.Moreover,since the excellent performance of combining the point direction and block direction,it can also yield satisfactory results for mutation of direction.It is a fast and exacting approach for ... |
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| Keywords: | Fingerprint image Point direction Block direction Directional message |
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