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基于小波分解的非对称水印

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摘要 数字水印技术是一种能够为当前的数字作品提供版权保护和完整性认证的技术手段。对称数字水印不能实现公开验证,那么非对称数字水印算法就成为国内外不少学者开始研究的对象。本文提出一种利用置换构建的非对称数字水印技术,其原理基于小波变换。该算法首先要对载体图像进行三层小波分解,然后嵌入水印。嵌入的水印信号由公开水印和秘密水印两个部分组成。其次利用宿主图像的Hash值进行扩频得到公开水印,最后对公开水印进行Arnold变换产生秘密水印。该算法具有很强的鲁棒性和更高的安全性。
作者 许文英 李德
出处 《山东工业技术》 2019年第4期173-173,共1页 Journal of Shandong Industrial Technology
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