基于图像几何变化跟踪的水印算

doi:10.1016/j.visinf.2018.03.001

Vis Inf

2018, Vol. 2

Issue (2): 125-135 DOI: 10.1016/j.visinf.2018.03.001

论文

基于图像几何变化跟踪的水印算

Ratnakirti Roy^a, Tauheed Ahmed^b, Suvamoy Changder^a

^aDepartment of Computer Science and Engineering, National Institute of Technology, Durgapur, West Bengal, 713209, India ^bReliability Engineering Centre, Indian Institute of Technology, Kharagpur, West Bengal, India

Watermarking through image geometry change tracking

Ratnakirti Roy^a, Tauheed Ahmed^b, Suvamoy Changder^a

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摘要： 背景：大多数数字图像水印技术容易受到诸如剪切、旋转和缩放等几何攻击的影响。这些攻击通过几何操作改变了载体图像中像素的朝向，从而使得水印难以定位和提取，是最简单也是最为成功的攻击手段。然而，如果能根据图像几何的变化对缩放、剪切和旋转等几何攻击产生的变化进行建模，即使原始图像受到了攻击，仍可以重新确定水印的位置。 贡献：本文提出的图像水印技术基于图像几何对剪切、缩放和旋转等攻击进行建模，可以有效抵抗常见的几何攻击和图像处理攻击。水印可以高效的嵌入并抵御图像处理攻击。水印检测过程是不透明的和基于密钥的，且不需要原始图像来提取水印。该技术致力于保证所提出的方案具有抗攻击的鲁棒性，并具有水印覆盖图像的高视觉保真度。

关键词： 水印; 几何攻击; 鲁棒水印; 图像几何; 保真

Abstract: Most of the digital image watermarking techniques are susceptible to geometric attacks such as cropping, rotation and scaling. These attacks are the easiest yet most successful in rendering the survival of watermark difficult. Such geometric operations alter the pixel orientation in the cover thereby rendering the watermark difficult to locate and extract. However, if the alterations produced by the geometric attacks such as scaling, cropping and rotation can be modeled in terms of the change in the image geometry, it is possible to relocate the watermark even after the original cover has suffered an attack. This paper contributes to the state of the art by proposing an image watermarking technique that attempts to model the attacks like cropping, scaling and rotation in terms of the image geometry. The proposed scheme is acceptably resistant to common geometric attacks and common image processing attacks. The watermark embedding is also done efficiently to offer resistance to image processing attacks. The watermark detection procedure is blind and key based, also not requiring the original cover work for watermark extraction. Efforts have been given to ensure that the proposed scheme conforms to robustness against attacks and exhibits high visual fidelity of the watermarked cover.

Key words: Watermarking Geometric attacks Robust watermarking Image geometry Fidelity

出版日期: 2018-07-17

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引用本文:

Ratnakirti Roy, Tauheed Ahmed, Suvamoy Changder. Watermarking through image geometry change tracking. Vis Inf, 2018, 2(2): 125-135.

链接本文:

http://www.zjujournals.com/vi/CN/10.1016/j.visinf.2018.03.001 或 http://www.zjujournals.com/vi/CN/Y2018/V2/I2/125

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