[1]吴捷[],马小虎[]. 基于Hadamard变换和LU分解的盲水印算法[J].计算机技术与发展,2016,26(02):82-86.
　WU Jie[],MA Xiao-hu[]. A Blind Digital Image Watermarking Algorithm Based on Hadamard Transform and LU Decomposition[J].,2016,26(02):82-86.
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 基于Hadamard变换和LU分解的盲水印算法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
26
期数:
2016年02期
页码:
82-86
栏目:
安全与防范
出版日期:
2016-02-10

文章信息/Info

Title:
 A Blind Digital Image Watermarking Algorithm Based on Hadamard Transform and LU Decomposition
文章编号:
1673-629X（2016)02-0082-05
作者:
 吴捷[1]; 马小虎[2]
 1.泰州职业技术学院 信息工程学院；2.苏州大学 计算机科学与技术学院
Author(s):
 WU Jie[1]; MA Xiao-hu[2]
关键词:
 ; 数字水印; Hadamard变换; LU分解; 鲁棒性
Keywords:
 ; digital watermarking; Hadamard Transforms ( HT); LU decomposition; robustness
分类号:
TP391.41
文献标志码:
A
摘要:
 为提高传统数字图像水印算法的安全性，解决数字水印对信号处理和几何失真比较敏感的问题，提出一种基于Hadamard变换和LU分解的盲水印嵌入算法。不同于常见的变换域数字水印技术，该方案对原始图像进行二维Hadamard变换(HT)，将得到的变换图像进行8×8分块，然后对每个分块进行LU及SVD分解，从得到的对角矩阵中选择一个关键位嵌入水印。通过计算所有关键位的平均值，并比较每个关键位和平均值的大小关系，计算得到密钥，利用密钥实现了水印的盲检测。实验结果表明，提出的盲水印算法不但具有较好的保真度，对于各种攻击也具有较强的鲁棒性。
Abstract:
 In order to improve the security of traditional digital image watermarking algorithm and solve the problem of digital watermark is sensitive to signal processing and geometric distortion,a new digital watermarking algorithm based on LU decomposition and Hadamard transform was proposed. Unlike the common transform domain watermarking techniques,this scheme decomposes the whole image with two-dimensional Hadamard transform firstly,and then divides the image into 8×8 blocks,taking LU and SVD decomposition for each block,selecting an embedded position of each block to add watermarking. By calculating the average of all the embedded position value, and comparing each embedded position value with average value,get the key which is used to realize the blind detection. Experimental re-sults show the blind watermarking algorithm proposed not only has good fidelity,but also owns great robustness to various attacks.

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更新日期/Last Update: 2016-04-15