计算机工程 ›› 2009, Vol. 35 ›› Issue (12): 128-130.doi: 10.3969/j.issn.1000-3428.2009.12.045

• 安全技术 • 上一篇    下一篇

基于Turbo码和扩频的图像多水印技术

马晓雷1,李宏昌2   

  1. (1. 武警工程学院研究生大队,西安 710086;2. 武警工程学院基础部,西安 710086)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-06-20 发布日期:2009-06-20

Image Multi-watermark Technology Based on Turbo Code and Spread Spectrum

MA Xiao-lei1, LI Hong-chang2   

  1. (1. Postgraduate Battalion, Armed Police Engineering College, Xi’an 710086; 2. Basis Department, Armed Police Engineering College, Xi’an 710086)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-20 Published:2009-06-20

摘要: 提出一种基于Turbo码和扩频技术相结合的多水印算法,可以在一个图像上嵌入多个二值图像来代表不同信息。该算法利用Turbo码优异的纠错性能和扩频通信的多址技术,并根据人眼视觉特性,将经过伪随机排序、Turbo码编码并使用不同的伪随机码扩频的水印嵌入到DCT变换系数的中频中。对算法在多种攻击下进行仿真。实验结果表明,利用该算法实现的水印具有良好的不可见性和鲁棒性。

关键词: Turbo码, 扩频, DCT变换

Abstract: This paper proposes an image multi-watermark algorithm based on Turbo code and spread spectrum. Different information can be represented by binary images embedded in an image. Using the excellent error-correcting of Turbo code and spread spectrum communication technology, the watermark is embedded in the DCT coefficients mid-frequency, which is arranged by Pseudo-random, coded by Turbo code and spread spectrum, in accordance with the visual characteristics of the human eye. At the same time, the algorithm under several attacks is simulated. The experimental results show that the algorithm is good at invisibility and robust on implementing the watermark.

Key words: Turbo code, spread spectrum, DCT transform

中图分类号: