Reversible Data Hiding Using the Companding Technique and Improved DE Method
Reversible Data Hiding Using the Companding Technique and Improved DE Method
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DOI：
10.1007/s00034-008-9021-3
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
S. Weng;Yao Zhao;Jeng-Shyang Pan;R. Ni
中科院分区：
文献类型：
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作者：
S. Weng;Yao Zhao;Jeng-Shyang Pan;R. Ni
提出了一种新的基于压扩技术和改进的差值扩展(DE)方法的可逆数据隐藏方案。采用压扩技术将有效载荷嵌入到整数小波变换域的高频段中。针对逆IWT后像素值可能出现的上溢/下溢问题，提出了一种基于直方图修正的细化方法。为了真正可逆，通过使用改进的DE方法，巧妙地将直方图修改过程中产生的附加信息嵌入到载体图像中。通过一系列实验验证了该方法的可行性和有效性。实验结果表明，该方案在嵌入容量和视觉质量方面均优于已有的方法。
A novel reversible data hiding scheme based on the companding technique and an improved difference expansion (DE) method is presented in this article. The companding technique is employed to embed payload into high frequency bands in the integer wavelet transform (IWT) domain. A refined method based on histogram modification is proposed as a remedy to the potential problem on overflow/underflow in pixel values after reverse IWT. To be truly reversible, additional information incurred by the histogram modification process is ingeniously embedded into the carrier image by using an improved DE method. A series of experiments is conducted to verify the feasibility and effectiveness of the proposed approach. As revealed in the experimental results, the proposed scheme outperforms existing approaches, in terms of embedding capacity and visual quality, as expected.