| 指纹识别中动态门限值设定方法的研究 |
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| 引用本文： | 刘洪波,董姝敏,王立忠.指纹识别中动态门限值设定方法的研究[J].长春大学学报,2009,19(8):18-21. |
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| 作者姓名： | 刘洪波 董姝敏 王立忠 |
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| 作者单位： | 吉林师范大学信息技术学院,吉林四平136500 |
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| 摘 要： | 提出了一种在基于图像的指纹识别系统中，图像二值化中的动态门限值的确定方法。通过对几种传统门限值确定法的分析，得出传统确定门限值方法在数学计算上的弊端，进而引出基于探测概率和虚警概率确定门限值的优点，并给出了基于概率与统计学上的推导过程。这种恒虚警概率条件下的动态门限值确定法克服了传统方法的缺点，完全适应于计算机求解。因此，将该种理论与现在的处理技术和手段相结合，能够很好地满足指纹识别系统的实时性要求。
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| 关 键 词： | 指纹识别 图像处理 二值化 门限值 动态设定 |
The research on dynamic threshold setting method for fingerprint identification |
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| LIU Hong-bo,DONG Shu-min,WANG Li-zhong.The research on dynamic threshold setting method for fingerprint identification[J].Journal of Changchun University,2009,19(8):18-21. |
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| Authors: | LIU Hong-bo DONG Shu-min WANG Li-zhong |
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| Institution: | LIU Hong-bo,DONG Shu-min,WANG Li-zhong(College of Information Technology,Jilin Normal University,Siping 136500,China) |
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| Abstract: | This paper puts forward a dynamic threshold determination method based on images in fingerprint identification system and image binaryzation.Through analyzing the traditional threshold determination methods,it gets the shortcomings in mathematical calculation,gives advantages of determining threshold according to the detection probability and false alarm probability and presents the derivation process on the basis of probability and statistics.This dynamic threshold method under the condition of constant fa... |
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| Keywords: | fingerprint identification image processing binaryzation threshold value dynamic setting |
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