摘要
提出一种基于小波变换的彩色图像水印算法。通过对彩色水印进行分解、置乱、压缩等预处理过程来提高水印的透明性及鲁棒性;通过采用多通道、分区域及控制嵌入强度等方法来提高水印的鲁棒性及容量。采用Matlab对水印的嵌入及提取过程进行仿真,并对嵌入水印后的图像进行剪切、压缩、加噪等攻击测试。仿真结果表明该算法透明性好,具有较强的抗攻击能力。
A colour image watermark algorithm based on DWT is presented in this paper. The transparency and robustness of the watermark are improved through the pre-processing of decomposition, scrambling and compression. The robustness and capacity of watermark are also enhanced by the means of muhicenter, area division and embedding intensity control, etc. Watermark embedding and extracting are simulated by MATLAB, the image is tested with attacks such as cropping, compression and noise adding after the watermark is embedded. Simulation results show that this algorithm is quite transparer^t and has a good ability in attack resistance.
出处
《计算机应用与软件》
CSCD
北大核心
2013年第7期136-138,142,共4页
Computer Applications and Software
基金
江苏省科技厅自然科学基金项目(BK2011375)
关键词
彩色水印
小波变换
置乱
鲁棒性
Colour watermarking Wavelet transform Scrambling Robustness
