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arXiv 1012.2965cs.MM
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数字水印:一种基于Hilbert变换的方法

Digital watermarking : An approach based on Hilbert transform

Rashmi Agarwal, R. Krishnan, M. S. Santhanam, K. Srinivas, K. Venugopalan

摘要:

用于数字图像的水印的大多数公知算法涉及将图像数据变换到傅立叶或奇异向量空间。本文介绍了一种基于希尔伯特变换域的数字水印技术。通常,如果图像是$m$乘$n$阶的矩阵,则变换空间也是相同阶的图像。然而,对于希尔伯特变换,变换空间的阶为$2m$乘$2n$。这允许在将水印存储在宿主图像中时有更大的自由度。基于这一思想,我们提出了一种在宿主图像中嵌入和提取水印的算法,并解析地得到了与此过程相关的参数。使用广泛的模拟,我们表明,该算法表现良好,即使主机图像被损坏的各种攻击。

英文摘要:

Most of the well known algorithms for watermarking of digital images involve transformation of the image data to Fourier or singular vector space. In this paper, we introduce watermarking in Hilbert transform domain for digital media. Generally, if the image is a matrix of order $m$ by $n$, then the transformed space is also an image of the same order. However, with Hilbert transforms, the transformed space is of order $2m$ by $2n$. This allows for more latitude in storing the watermark in the host image. Based on this idea, we propose an algorithm for embedding and extracting watermark in a host image and analytically obtain a parameter related to this procedure. Using extensive simulations, we show that the algorithm performs well even if the host image is corrupted by various attacks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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