摘要
本文提出了一种基于重叠正交变换 (LOT)的自适应图像水印算法 ,给出了水印嵌入和检测的详细算法设计 .数字图像水印是最近发展起来的一项新技术 ,它为图像的版权保护问题提供了一种新的解决思路 .本文首次在水印算法中采用了LOT以代替传统的离散余弦变换 (DCT) ,从而有效地避免了DCT的块效应 .同时 ,本文还利用人的视觉系统 (HVS)特性 ,在对图像块进行分类的基础上完成了水印的自适应嵌入 .实验结果表明 。
A LOT (Lapped Orthogonal Transform) based adaptive image watermarking method is proposed, including the two-step scheme designed for watermark embedding and detection. As an emerging technology, digital image watermarking provides an effective solution to the problem of copyright protection. LOT is first adopted in the watermarking algorithm instead of DCT, which greatly reduces the blocking effects. Moreover, the property of Human Visual System (HVS) is utilized to classify image blocks so that the watermark embedding can be adaptively implemented. Experimental results demonstrate that the proposed watermarking method has good performance on both robustness and transparency.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2001年第10期1368-1372,共5页
Acta Electronica Sinica
关键词
图像编码
图像水印
重叠正交变换
自适应嵌入
版权保护
Algorithms
Classification (of information)
Computer simulation
Copyrights
Image processing
Mathematical transformations
Robustness (control systems)
Transparency
