| 一种利用动态滤波模板进行指纹图像增强的算法 |
| |
| 引用本文： | 林喜荣,于政涛,苏晓生,夏雄武,陈军.一种利用动态滤波模板进行指纹图像增强的算法[J].清华大学学报(自然科学版),2001,41(8):37-40. |
| |
| 作者姓名： | 林喜荣 于政涛 苏晓生 夏雄武 陈军 |
| |
| 作者单位： | 1. 清华大学精密仪器与机械学系,
2. 上海超艺科技有限公司, |
| |
| 摘 要： | 在实时指纹识别系统中 ,指纹图像的增强算法起着至关重要的作用。但通常的增强算法经常要花费较多的时间 ,或者不适用于指纹频率区别较大的数据库。在大量样本分析的基础上 ,根据指纹纹理频率参数的变化动态调整方向滤波模板的大小对指纹图像进行有效的增强处理 ,对不同的纹理方向专门采用了查表的方法 ,减小了时间消耗。实验表明 ,这种算法能够快速有效的增强指纹图像 ,尤其适用于指纹频率区别较大的指纹样本库中 ,并在实时指纹鉴别系统中得到了应用
|
| 关 键 词： | 指纹增强 方向图 方向滤波 二值化 |
| 文章编号： | 1000-0054(2001)08-0037-04 |
| 修稿时间： | 2000年3月18日 |
Enhanced fingerprint images using dynamic filter masks |
| |
| LIN Xirong ,YU Zhengtao ,SU Xiaosheng ,XIA Xiongwu ,CHEN Jun.Enhanced fingerprint images using dynamic filter masks[J].Journal of Tsinghua University(Science and Technology),2001,41(8):37-40. |
| |
| Authors: | LIN Xirong YU Zhengtao SU Xiaosheng XIA Xiongwu CHEN Jun |
| |
| Institution: | LIN Xirong 1,YU Zhengtao 1,SU Xiaosheng 1,XIA Xiongwu 1,CHEN Jun 2 |
| |
| Abstract: | In a real time automatic fingerprint identification system (AFIS), the image enhancement algorithm plays a key important role and should be effective as well as fast. However, many image enhancement algorithms are time consuming or not effective for fingerprint samples when their frequencies vary. Analysis of a large number of fingerprint samples suggests that the mask size of the oriented filter should be changed in real time with fingerprint frequency variations. The operation time is reduced with a special look up table method in the fingerprint enhancement algorithm. Experimental results show that the enhancement algorithm is effective and fast, and is applicable with various fingerprint sample frequencies. The enhancement algorithm has been integrated into a practical AFIS system. |
| |
| Keywords: | fingerprint enhancement orientation image oriented filter binarization |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
