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:
马晓雷;李宏昌. 基于Turbo码和扩频的图像多水印技术[J]. 计算机工程, 2009, 35(12): 128-130.
MA Xiao-lei; LI Hong-chang. Image Multi-watermark Technology Based on Turbo Code and Spread Spectrum[J]. Computer Engineering, 2009, 35(12): 128-130.