Parity-invariability-based reversible watermarking

Parity-invariability-based reversible watermarking
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基于奇偶不变性的可逆水印

DOI:
10.1049/el.2009.1504
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发表时间:
2009-09
影响因子:
1.1
通讯作者:
Pan, J. S.
Pan, J. S.
中科院分区:
工程技术4区
文献类型:
--
作者:
Weng, S. W.;Ni, R. R.;Zhao, Y.;Pan, J. S.

文献摘要

参考文献

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提出了一种定义在图像像素对上的可逆整数变换。该变换可以携带1位水印,同时保持对之和的奇偶性。此外,变换使一个变换的像素不相关的水印位,可以重用,以构建一个新的对与它的下一个像素。因此,对于单个嵌入过程,嵌入率可以接近每像素1比特。同时,关于该新对是否可用于可逆嵌入的判定也被大大简化。此外,变换的应用能够大大增加位置图的压缩比,并最终增加有效载荷。一系列的实验已经进行了验证所提出的方法的有效性。
A reversible integer transform, defined on an image pixel pair, is proposed. The transform can carry 1-bit watermark while retaining the parity of the sum of the pairs. Also, the transform makes one transformed pixel not related to the watermark bit which can be reused to construct a new pair with its next pixel. So the embedding rate can approach 1 bit per pixel for a single embedding process. Meanwhile, the decision on whether this new pair can be used for reversible embedding or not is greatly simplified. In addition, the application of the transform is able to largely increase the compression ratio of the location map, and finally increase the payload. A series of experiments has been conducted to verify the effectiveness of the proposed approach.
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