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基于小波变换的零水印算法研究 被引量:5

A non-watermark scheme based on discret wavelet transform
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摘要 针对数字水印不可见性和鲁棒性之间的矛盾,提出一种改进的基于小波变换的零水印方法。该算法首先基于混沌序列从原始图像小波系数的低频域提取特征水印,然后把得到的特征水印注册到IPR中。实验结果表明,此算法不直接修改载体图像数据,嵌入的水印具有良好的不可见性,对常见的JPEG压缩、噪声、剪切等各种图像攻击具有较强的鲁棒性,而且在不知道密钥的情况下,不可能成功的提取出水印信息,具有良好的安全性。 A Non-Watermark Scheme Based on improve Discret Wavelet Transform method is presented.Firstly,select some low frequency wavelet coefficients of original or tested image and compute the character of the selected coefficients to create watermark,and then,register the characteristics of zero-watermark to IPR.The results show that, This algorithm dose not modify any data of the original image,and the embedded watermark is of good visibility.
作者 雍蓉 吕建平
出处 《西安邮电学院学报》 2011年第1期45-48,共4页 Journal of Xi'an Institute of Posts and Telecommunications
关键词 零水印 LOGISTIC映射 小波变换 zero-watermarking logistic mapping discret wavelet
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参考文献6

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