摘要
本文提出一种基于多分辨率分解的数字水印技术 .利用多分辨率分解技术 ,相同分辨率层次的灰度级数字水印嵌入到对应的相同分辨率层次的原始静态图像之中 ,使水印对原始图像具有自适应性 .由于水印的嵌入过程是基于原始图像的不同分辨率层次之间的关系 ,所以水印的提取过程不需要原始图像 .实验结果表明本文提出的数字水印技术 ,经某些图像处理操作和JPEG有损压缩后仍是鲁棒的 .
A digital watermarking technique based on multiresolution decomposition is proposed.By multiresolution decomposition technique,the decomposed watermarks of different resolution are embedded into the corresponding resolution of the decomposed original image,which makes the watermark be adapted to the original image.The algorithm can extract the watermark without the original image because the embedding procedure is based on the relationship between different resolution layers of the original image.Experimental results show that the proposed technique is robust to some image processing operations and Joint Photographic Experts Group (JPEG) lossy compression.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2000年第8期1-4,共4页
Acta Electronica Sinica
关键词
版权保护
数字水印
多分辨率分解
copyright protection
digital watermark
discrete wavelet transform
