| 非抽样Contourlet变换的盲数字水印 |
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| 引用本文： | 杨韫饴,王玲,张博.非抽样Contourlet变换的盲数字水印[J].计算机与数字工程,2010,38(10):113-115,193. |
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| 作者姓名： | 杨韫饴 王玲 张博 |
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| 作者单位： | 1. 湖南师范大学物理与信息科学学院,长沙,410081
2. 长沙师范高等专科学校电子信息工程,长沙,410100 |
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| 基金项目： | 湖南省教育厅资助科研项目 |
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| 摘 要： | 根据非抽样Contourlet变换的特性,提出一种非抽样Contourlet变换域的盲水印算法,算法选择在具有最大能量的中高频子带中嵌入水印,在对水印进行加密后,利用密钥生成PN序列,根据水印值的不同PN序列嵌入宿主图像的方式也不同。提取水印不需要原始图像,利用NSCT变换系数与PN序列的相关性系数提取水印,实现盲提取。实验证明算法具有一定的不可见性和鲁棒性,具有很强的抗JPEG压缩的鲁棒性。
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| 关 键 词： | 非抽样Contourlet变换 盲水印 PN序列 鲁棒性 |
A Blind Digital Watermarking of Nonsubsampled Contourler Transform |
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| Yang Yunyi,Wang Ling,Zhang Bo.A Blind Digital Watermarking of Nonsubsampled Contourler Transform[J].Computer and Digital Engineering,2010,38(10):113-115,193. |
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| Authors: | Yang Yunyi Wang Ling Zhang Bo |
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| Affiliation: | Yang Yunyi)Wang Ling)Zhang Bo)(Schoole of Physics and Information Science,Hunan Normal University1),Changsha410081)(Electronic Information Project,Changsha Normal High Level Specialty School2),Changsha410100) |
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| Abstract: | According to the feature of the Nonsubsampled Contourlet transform,a blind digital watermarking is proposed.The algorithm chooses the sub-band which has the largest energy to embed the watermark.After encrypt the watermark,use the key to generate the PN sequence,the PN sequence will be embedded in the host image in different ways according to the different value of the watermark.Extract the watermark based on the correlation values of the PN sequence and the sub-band without the original image,achieved the blind extract.Results show that the algorithm has a certain degree of invisibility and robustness.Especially has great robustness against the JPEG compression. |
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| Keywords: | nonsubsampled contourlet transform blind watermark PN sequence rubustness |
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