基于四元数傅里叶梅林变换的RST不变彩色图像水印算法

doi:10.3969/j.issn.1006-2475.2014.05.025

计算机与现代化 ›› 2014, Vol. 0 ›› Issue (5): 113-117.doi: 10.3969/j.issn.1006-2475.2014.05.025

基于四元数傅里叶梅林变换的RST不变彩色图像水印算法

华南师范大学物理与电信工程学院，广东广州510006

收稿日期:2014-01-13 出版日期:2014-05-28 发布日期:2014-05-30
作者简介:钟艳(1990-),女,江西南昌人,华南师范大学物理与电信工程学院硕士研究生,研究方向：数字水印,图像处理。

RST Invariant Color Image Watermarking Algorithm Based on Quaternion Fourier-Mellin Transform

School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China

Received:2014-01-13 Online:2014-05-28 Published:2014-05-30

摘要/Abstract

摘要： 提出一种基于四元数傅里叶梅林变换(QFMT)的RST(旋转、缩放和平移)不变彩色图像水印算法，利用图像的不变质心生成具有平移稳定性的圆形特征区域，对这个圆形区域进行QFMT。利用QFMT幅度谱具有旋转和缩放不变性，在QFMT幅度谱中嵌入水印信息。该算法不仅可以抗RST攻击，大大提升水印的鲁棒性，而且可以把水印嵌入所带来的误差扩散到载体图像的各个颜色分量之中，扩大水印嵌入的容量。实验结果表明，该方法具有较好的抗压缩性，对RST等攻击有良好的鲁棒性。
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关键词: 图像水印, 四元数傅里叶梅林变换, 彩色图像, RST攻击, 四元数傅里叶变换, 鲁棒性

Abstract: In this paper, a RST (Rotation, Scaling and Translation) invariant color image watermarking algorithm is proposed by using Quaternion Fourier-Mellin Transforms (QFMT). Firstly translation invariance is achieved by circular feature region which can be generated using invariant centroid. Then the circular region is transferred into QFMT domain. Rotation invariance and scaling invariance are constructed by embedding the digital watermarking into the QFMT spread spectrum. The proposed color image watermarking scheme is of better robustness against RST attacks. And the proposed algorithm spreads the image distortions from the watermarking into the three channels of host image, thus leading to an increased capacity of watermarking embedding. Experimental results demonstrate that this method is of good robustness against JPEG compression and RST attacks.
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Key words: image watermarking, quaternion Fourier-Mellin transforms, color image, RST attacks, quaternion Fourier transforms, rubustness

中图分类号:

TP309.7

钟艳. 基于四元数傅里叶梅林变换的RST不变彩色图像水印算法[J]. 计算机与现代化, 2014, 0(5): 113-117.

ZHONG Yan. RST Invariant Color Image Watermarking Algorithm Based on Quaternion Fourier-Mellin Transform[J]. Computer and Modernization, 2014, 0(5): 113-117.

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基于四元数傅里叶梅林变换的RST不变彩色图像水印算法

RST Invariant Color Image Watermarking Algorithm Based on Quaternion Fourier-Mellin Transform

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