| 基于边缘强度的指纹图像二值化方法 |
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| 引用本文： | 张正言,徐荣青.基于边缘强度的指纹图像二值化方法[J].江苏科技大学学报(社会科学版),2007,21(2):67-70. |
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| 作者姓名： | 张正言 徐荣青 |
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| 作者单位： | 江苏科技大学电子信息学院 江苏镇江212003 |
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| 摘 要： | 提出了一种合理有效的指纹图像二值化方法,先利用Kirsch算子得到指纹图像的方向场,然后对指纹图像进行方向中值滤波,最后通过图像的边缘强度设计局部自适应阈值对指纹图像进行分割,从而得到二值化图像。在自适应阈值的计算上,文中还提出了一种如何选择最佳图像分块大小的方法。实验结果表明,该方法不但处理效果好,而且运算速度快,满足了处理要求。
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| 关 键 词： | Kirsch算子 方向场 滤波 边缘强度 二值化 |
| 文章编号： | 1673-4807(2007)02-0067-04 |
| 修稿时间： | 2006年5月23日 |
Method of Fingerprint Images Binarization Based on Edge Intensity |
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| ZHANG Zhengyan,XU Rongqing.Method of Fingerprint Images Binarization Based on Edge Intensity[J].Journal of Jiangsu University of Science and Technology:Natural Science Edition,2007,21(2):67-70. |
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| Authors: | ZHANG Zhengyan XU Rongqing |
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| Abstract: | A reasonable and effective binary method of the fingerprint images is proposed.The directional image of the fingerprint is obtained by using the Kirsch operator.Then the fingerprint image is filtered by mean of the directional medial filtering algorithm.At last,the binary images after segmenting the fingerprint images are obtained by the local adaptive thresholds relying on the edge intensity of images.A method for selecting the optimal block size for the threshold is proposed.The experiments show that this method not only has the advantages of fine processing effect,but also can work fast and meet the demand in image processing. |
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| Keywords: | Kirsch operator directional image filtering edge intensity binary method |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
