Reversible watermark using difference expansion of triplets
Reversible watermark using difference expansion of triplets
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DOI：
10.1109/icip.2003.1247008
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发表时间：
2003-11
期刊：
影响因子：
--
通讯作者：
A. Alattar
中科院分区：
文献类型：
--
作者：
A. Alattar
提出了一种基于彩色图像差分展开的可逆水印算法。由于水印是完全可逆的，因此可以准确地恢复原始图像。该算法使用像素的空间和光谱三联体来隐藏比特对，这使得算法可以隐藏大量数据。空间三重态是指从同一光谱分量中选取的任意三个像素值，而光谱三重态是指从不同光谱分量中选取的任意三个像素值。该算法递归地应用于图像光谱分量的行和列，并跨越所有光谱分量，以最大限度地提高隐藏能力。仿真结果表明，该算法具有很高的隐藏能力和较低的失真度。
A new reversible watermarking algorithm based on the difference expansion of colored images has been developed. Since the watermark is completely reversible, the original image can be recovered exactly. The algorithm uses spatial and spectral triplets of pixels to hide pairs of bits, which allows the algorithm to hide a large amount of data. A spatial triplet is any three pixel values selected from the same spectral component, while a spectral triplet is any three pixel values selected from different spectral components. The algorithm is recursively applied to the rows and columns of the spectral components of the image and across all spectral components to maximize the hiding capacity. Simulation results show that the hiding capacity of the algorithm is very high and the resulting distortion is low.