| 低质指纹图像的增强方法 |
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| 引用本文： | 何孝富,施鹏飞. 低质指纹图像的增强方法[J]. 数据采集与处理, 2005, 20(4): 440-443 |
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| 作者姓名： | 何孝富 施鹏飞 |
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| 作者单位： | 上海交通大学图像处理与模式识别研究所,上海,200030;上海交通大学图像处理与模式识别研究所,上海,200030 |
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| 基金项目： | 国家自然科学基金（60427002）资助项目. |
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| 摘 要： | 基于Gabor滤波器的低质指纹增强技术,对区域掩模及脊线频率的计算进行了改进.区域掩模的计算采用方向场的局部确定性水平方法,使得后续计算脊线频率时只对前景块进行操作,可以提高系统运行速度.在对前景块计算脊线频率时,可以通过设置参数来解决非良好正弦波形问题.该方法在国际标准指纹库及自己采集的指纹库上进行实验,实验结果表明,本文方法增强效果有明显的提高.
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| 关 键 词： | 指纹增强 Gabor滤波 区域掩模 脊线频率 |
| 文章编号： | 1004-9037（2005）04-0440-04 |
| 收稿时间： | 2004-12-11 |
| 修稿时间： | 2005-04-11 |
Enhancement Method for Low Quality Fingerprint Images |
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| HE Xiao-fu,SHI Peng-fei. Enhancement Method for Low Quality Fingerprint Images[J]. Journal of Data Acquisition & Processing, 2005, 20(4): 440-443 |
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| Authors: | HE Xiao-fu SHI Peng-fei |
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| Affiliation: | Institute of Image Processing and Pattern Recognition, Shanghai Jiaotong University, Shanghai, 200030 ,China |
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| Abstract: | An improved enhancement method based on the Gabor filtering technique is proposed. Firstly, an improved calculation method of the region mask is suggested. Then, parameters for the ridge frequency calculation are determined according to the fingerprint sensors. By utilizing these parameters, problems of the noninusoidal-shaped wave for the fingerprint projection can be effectively resolved. The method is tested with the FVC2004 fingerprint database. Experimental results show that the enhancement result of the method is improved. |
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| Keywords: | fingerprint enhancement Gabor filtering region mask ridge frequency |
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