| 一种基于UGM模型和数字水印的社保卡防伪技术 |
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| 引用本文： | 李峰,王浣尘,刘静岩.一种基于UGM模型和数字水印的社保卡防伪技术[J].系统工程理论与实践,2005,25(5):123-126. |
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| 作者姓名： | 李峰 王浣尘 刘静岩 |
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| 作者单位： | 上海交通大学管理学院 |
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| 摘 要： | 提出了一种基于UGM模型和数字水印的社保卡防伪技术.基本思想是首先用UGM模型把水印图像转化为范围为(-3,3)的数据序列,然后加到DWT变换后的封面图像的中频部分,最后通过逆小波变换和UGM模型将水印图像抽取出来,从而判断社保卡的真伪.实验结果表明,嵌入水印后的封面图像与抽取的水印图像都有很好的视觉效果,运算速度较快,具有较高的实用性.
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| 关 键 词： | 社保卡 灰色摆动模型 离散小波变换 数字水印 |
| 文章编号： | 1000-6788(2005)05-0123-04 |
| 修稿时间： | 2004年6月4日 |
A New Anti-counterfeiting Technology of Social Security Card Based on UGM and Digital Watermarking |
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| LI Feng,WANG Huan-chen,LIU Jing-yan.A New Anti-counterfeiting Technology of Social Security Card Based on UGM and Digital Watermarking[J].Systems Engineering —Theory & Practice,2005,25(5):123-126. |
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| Authors: | LI Feng WANG Huan-chen LIU Jing-yan |
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| Institution: | Management School,Shanghai jiaotong University |
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| Abstract: | We present a new anti-counterfeiting technology of social security card based on UGM and digital watermarking. Firstly, the grey scale of watermark image is converted to range (-3,3) using UGM. Secondly, the converted watermark image is added to the middle-frequency range of transformed cover image. Finally, we abstract the watermarking image using inversed wavelet transform and UGM. Then we can judge if the card is valid. The experiment result shows good visual quality both the embedded cover image and the reconstructed watermark image with high computing speed. So the method is applicable. |
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| Keywords: | social security card undulating grey model (UGM) discrete wavelet transform (DWT) digital watermarking |
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