摘要
提出了一种改进的、基于二元树复小波变换的数字水印算法。该算法对水印的嵌入和检测机制进行了改进,使用了扩频嵌入机制和纠错码技术,检测算法性能时将同样的嵌入机制应用在离散小波变换(DWT)中,并采用水印检测软件对它们进行检测对比。实验结果表明,该水印算法能够适应局部图像的变化,水印对于压缩攻击、大部分的滤波攻击都有很好的鲁棒性。
An improved digital watermarking algorithm based on dual-tree complex wavelet transform was presented. The algorithm improved the embedding scheme and extracting scheme, and used the spread spectrum in embedding scheme and RS-errot correction code, Experiment results show that the algorithm is more robust than DWT method. What＇s more, it can apply to the local activity of image and the watermark has better robustness against common attacks.
出处
《计算机应用研究》
CSCD
北大核心
2007年第10期138-140,144,共4页
Application Research of Computers
基金
广西留学回国人员科学基金项目(桂科回0342001)
广西科技攻关项目(桂科攻033008-9)
关键词
数字水印
复小波域
二元树复小波变换
人类视觉系统
鲁棒性
digital watermarking
complex wavelet domain
dual-tree complex wavelet transform
human vision system
robustness
