【摘要】 该文提出一种基于小波域扩谱的无损数据隐藏方法。该方法根据扩谱原理把数据嵌入到图象整数小波变换后的高频子带系数中;通过嵌入伪信息的方式,解决了在提取信息时无法判断在哪些系数上嵌入了水印信息的问题;另外,为防止小波反变换时图象灰度溢出问题,使用了直方图调整技术。实验结果表明,该方法能嵌入大容量的数据信息,同时保持很好的视觉效果,在图象认证及伪装通讯等领域具有广泛用途。更多还原

【Abstract】 This paper presents a reversible data hiding method based on wavelet spread-spectrum and histogram modi-fication.According to the principle of spread-spectrum,we have embed data in wavelet high-frequency subband coeffi-cients.The pseudo information is embedded to solve the problem that we don’t know which coefficients are used for embedding when extracting the embedded information.To prevent the overflow and underflow problem,histogram modifica-tion is used.Experiments show that our method can achieve good performance both on capacity and visual effect.更多还原