摘要
提出了一个基于频域块分类的ＤＣＴ域自适应水印算法。为了实现自适应，将原始图象分块并利用视觉掩蔽特性对图象块进行分类。根据分类的结果，不同强度的水印分量被嵌入到图象块的ＤＣＴ低频系数中。实验结果表明，应用所提出的算法实现的水印对常见图象处理和噪声干扰具有很好的稳健性。
In this paper,an adaptive im age w aterm arking algorithm in DCT dom ain based on the block classification is pro posed.By exploiting the visualm asking featuresofHVS,thealgorithm splitsthe originalim ageinto blocksand classifiesthese blocks.Waterm ark com ponents w ith differentstrength are inserted into som e low frequency coefficients adaptively according to the clsaaification.The experim entalresultsdem onstratethatthe w aterm arks generated w ith theproposed algorithm are in visible and robustagainstnoise and com m only used im age processing techniques.
出处
《中国图象图形学报（A辑）》
CSCD
1999年第8期640-643,共4页
Journal of Image and Graphics
基金
广东省自然科学基金
关键词
图象水印
数字水印
视觉掩蔽
块分类
DCT
Im age w aterm arking, Digitalw aterm arking, Visualm asking, Block classification, DCT
