基于Logistic混沌加密的NSCT-SVD抖动调制盲水印算法  

Jitter Modulation Blind Watermarking Algorithm Based on Logistic Chaotic Encryption and NSCT-SVD

作　　者：马婷[1] 高大鹏[1] 王欣[1] 

机构地区：[1]中国民用航空飞行学院,广汉618307

出　　处：《包装工程》2016年第5期156-160,166,共6页Packaging Engineering

基　　金：国家自然科学基金(60879022)

摘　　要：目的提出一种既安全又具高稳健性的盲水印算法。方法首先通过Logistic映射混沌置乱对图像加密,然后对载体图像进行三层非采样Contourlet变换(NSCT),提取低频部分进行8×8分块,最后对低频带的子块进行奇异值分解(SVD),将混沌变换的水印图像嵌入在进行抖动调制的奇异值中。结果该算法解决了奇异值分解引起的False positive问题即虚警率,在提取水印的算法过程中没有用到原载体图像,实现了水印的嵌入及盲检测。实验结果显示,该算法提高了水印的防伪性,耐常见攻击的抵抗能力也较强。结论该算法满足了数字水印技术要求的隐蔽性和稳健性,并且可以对数字产品起到版权保护的作用。A safe and highly robust blind watermarking algorithm was proposed. First, the image was encrypted through Logistic Chaotic scrambling. Second, the original image was subjected to three-dimensional NSCT. The low-frequency portion was extracted and divided into 8 × 8 blocks. Third, low-frequency sub-bands of the block were subjected to SVD. The chaos watermark was embedded in singular values of jitter modulation. The algorithm solved the problem of the False positive problem caused by singular value decomposition, reducing the false alarm rate. In the process of watermarking extraction, the original image was not used, and the watermark embedding and blind detection were realized. The experimental results showed that the algorithm improved the watermark security and had relatively strong resistance to common attacks. The algorithm meets the requirements of digital watermarking technology for the invisibility and robustness, and can play a role of copyright protection in the digital products.

关 键 词：NSCT SVD Logistic映射混沌置乱 抖动调制 盲水印 

分 类 号：TS865[轻工技术与工程]