基于小波变换模极大值的鲁棒图像水印

M. Barr, C. Serdean
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引用次数: 0

摘要

本文提出了一种新的用于数字图像版权保护的盲水印技术。我们的技术使用了两种不同的水印。一种是用于嵌入标识的高容量多比特水印,另一种是用于检测几何攻击的低容量单比特水印。这两种水印都嵌入到RGB图像的红、绿、蓝分量中,并根据人类视觉系统的考虑进行加权。每个不重叠的水印使用扩频方法嵌入,基于伪随机噪声(PN)序列和唯一密钥。利用小波变换模极大值的平移不变性,并将其嵌入到小波变换的不同子带中,实现了对几何攻击的鲁棒性。实验结果表明,所提出的水印方案对旋转、缩放、平移等几何攻击具有较强的鲁棒性,与现有的水印算法相比具有较好的鲁棒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Robust logo watermarking based on wavelet transform modulus maxima
In this paper, a novel blind logo image watermarking technique is presented which can be used to protect the copyright of digital images. Our technique uses two different watermarks. One is a high capacity multi-bit watermark used to embed a logo and the other is a low capacity single-bit watermark used for the detection of geometrical attacks. Both watermarks are embedded into the red, green, and blue components of an RGB image, weighted based on human visual system considerations. Each non-overlapping watermark is embedded using a spread spectrum approach, based on a pseudorandom noise (PN) sequence and a unique secret key. Robustness against geometric attacks is achieved with the help of wavelet transform modulus maxima, which is shift invariant, and by embedding it in different sub-bands of the wavelet transform. The experimental results show that our proposed watermarking scheme is robust to geometric attacks such as rotation, scaling, and translation and compares favourably against existing techniques.
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