一种基于小波变换的鲁棒数字图像水印  

A Way of Robust Digital Watermark Based on Wavelet Transformation

作　　者：唐宁[1] 赵景秀[1] 

机构地区：[1]曲阜师范大学计算机科学学院,山东日照276826

出　　处：《计算机安全》2009年第11期44-46,共3页Network & Computer Security

摘　　要：提出了一种基于小波变换的鲁棒数字图像水印算法。该算法首先对水印信息进行置乱以降低空间相关性,然后把原始图像进行三级小波变换。并将水印信息嵌入到原始图像的低频子带中,最后经三级小波反变换得到嵌入水印后的图像。实验结果表明,该算法具有较强的鲁棒性。A robust digital image watermarking algorithm based on DWT is proposed in this paper. At first ,the watermark is scrambled to decrease the spatial correlation, then the original image is three-level wavelet transformed and embed the watermark into the low frequency sub- band of the original image. Finally, the watermarked image is achieved through reverse wavelet transform. Experiment results show that the proposed algorithm is robust against common image processing.

关 键 词：数字图像水印 小波变换 ARNOLD变换 鲁棒性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP273[自动化与计算机技术—计算机科学与技术]