| 一种基于NSCT与抖动量化的盲水印算法 |
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| 引用本文： | 闫芬,王康碧,李晨,赵勇,周卫红.一种基于NSCT与抖动量化的盲水印算法[J].云南民族大学学报(自然科学版),2013,22(3):222-225. |
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| 作者姓名： | 闫芬 王康碧 李晨 赵勇 周卫红 |
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| 作者单位： | 1. 云南民族大学数学与计算机科学学院,云南昆明,650500
2. 云南农业职业技术学院管理与信息工程系,云南昆明,650031 |
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| 基金项目： | 云南省教育厅科学研究基金，云南民族大学青年基金，云南民族大学研究生创新基金 |
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| 摘 要： | 在混沌置乱变换及抖动量化原理基础上,提出了一种基于NSCT的盲水印算法.首先将图像进行NSCT变换及分块SVD分解,再对原始水印信息进行混沌置乱变换以消除线性相关性,最后,利用抖动量化原理对分块SVD分解产生的各块奇异值进行修改实现水印嵌入.实验表明,该算法透明性好,拥有较强的鲁棒性,且在水印提取时实现了盲提取,是一种盲水印算法.
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| 关 键 词： | NSCT变换 抖动量化 盲水印算法 |
A blind algorithm based on NSCT and dither quantization |
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| YAN Fen
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WANG Kang-bi
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LI Chen
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ZHAO Yong
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ZHOU Wei-hong.A blind algorithm based on NSCT and dither quantization[J].Journal of Yunnan Nationalities University:Natural Sciences Edition,2013,22(3):222-225. |
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| Authors: | YAN Fen WANG Kang-bi LI Chen ZHAO Yong ZHOU Wei-hong |
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| Institution: | 1 ( 1. School of Mathematics and Computer Science , Yunnan University of Nationalities , Kunming 650500, China ; 2. Department of Management and Information Engineering, Yunnan Agricultural Vocational and Technical College , Kunming 650031, China) |
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| Abstract: | The paper proposes a blind watermarking algorithm based on NSCT and dither quantization. First, it transforms the image with NSCT and decomposes it with SVD block. Then, it sets the original watermark information chaos chaotically in order to eliminate the linear correlation. Subsequently, it alters every SVD block＇ s singular value based on the dither quantization to embed the watermark. The results show that this blind watermarking algorithm has a good imperceptibility and strong robustness, and can well achieve a blind watermark extraction. |
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| Keywords: | NSCT dither quantization blind watermarking |
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