计算机科学 ›› 2014, Vol. 41 ›› Issue (12): 48-52.doi: 10.11896/j.issn.1002-137X.2014.12.011
陈河山,吕珍珍,罗伟
CHEN He-shan,LV Zhen-zhen and LUO Wei
摘要： 设计了一个基于离散混沌动力系统和小波分解的数字图像水印算法。在水印图像预处理阶段,利用Logistic映射生成的混沌序列对水印图像进行扩展置乱,再利用Logistic映射生成密钥来对水印信息进行加密,从而保证了水印信息的安全性。在水印图像嵌入阶段,对宿主图像进行三层小波分解,利用小波系数大小关系将水印嵌入到水平方向的高频系数中。分析和实验结果表明,该算法具有良好的鲁棒性,水印的安全性和不可见性明显优于常见算法。
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