计算机与现代化

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基于四元数Zernike矩的RST不变彩色图像水印

  

  1. 华南师范大学物理与电信工程学院,广东广州510006
  • 收稿日期:2015-03-13 出版日期:2015-07-23 发布日期:2015-07-28
  • 作者简介:钟敏洁(1989-),女,湖北荆州人,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 #br# Based on Quaternion Zernike Moments

  1. School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
  • Received:2015-03-13 Online:2015-07-23 Published:2015-07-28

摘要:

提出一种基于四元数Zernike矩(QZM)的RST(Rotation, Scale, Translation)不变彩色图像水印方案,利用缩放平移归一化后的QZM模值具有旋转、缩放和平移不变性,采用抖动量化调制的方法在
QZM模值中嵌入水印信息。该水印算法可以把水印嵌入所带来的误差扩散到红、绿、蓝3幅分量图像中,实验表明该算法在具有良好的不可感知性的同时对旋转、缩放和平移等几何攻击具有较好的鲁棒性

关键词: 图像处理, 数字水印, 四元数Zernike矩, RST攻击, 彩色图像

Abstract:

In this paper, we propose a RST(Rotation, Scaling, Translation) invariant color image watermarking based on Quaternion Zernike Moments(QZM). Since the normalized
modulus of QZM has rotation, scale and translation invariance, this paper embeds watermarking information in the QZM’s modulus by using the method of dither modulation. This
algorithm can diffuse the error caused by watermark embedding to three component images(red, green, blue). The experiments show that it has good imperceptibility and robust to
geometric attacks, such as rotation, scale and translation.

Key words:  image processing, digital watermarking, quaternion Zernike moments, RST attacks, color image

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