首页 | 本学科首页   官方微博 | 高级检索  
     

DCT域图像水印:嵌入对策和算法
引用本文:黄继武,Yun Q.SHI,程卫东.DCT域图像水印:嵌入对策和算法[J].电子学报,2000,28(4):57-60.
作者姓名:黄继武  Yun Q.SHI  程卫东
作者单位:1. 中山大学电子系,广州,510275;中国科学院自动化所模式识别国家重点实验室,北京,100080
2. Dept.of ECE,New Jersey Institute of Technology,Newark,NJ 07102,USA
3. 成都气象学院电子系,成都,610041
基金项目:国家自然科学基金!(No.699750 1 1 )资助课题,广东省自然科学基金!(No.980 4 4 2 )
摘    要: DCT域的隐形水印应嵌入哪里,水印才足够稳健?尽管许多关于DCT域水印算法的文献赞成水印应放在对视觉效果重要的分量,但DC分量总是被无一例外地排除在外.本文提出了一个DCT域隐形水印的嵌入对策和一个应用该对策的自适应水印算法.基于对图像DCT系数振幅的定量分析,我们指出:DC分量比任何AC分量有更大的感觉容量,从稳健性的角度,DC分量最适合用来嵌入水印.应用这个对策,本文提出了一个把视觉系统纹理掩蔽特性结合到水印编码过程的自适应水印算法.实验结果有效地支持了这个结论,所产生的隐形水印体现了很好的稳健性.

关 键 词:图像水印  嵌入对策  视觉掩蔽  DCT  DC分量

Image Watermarking in DCT:an Embedding Strategy and Algorithm
HUANG Ji-wu,Yun Q.SHI,CHENG Wei-dong.Image Watermarking in DCT:an Embedding Strategy and Algorithm[J].Acta Electronica Sinica,2000,28(4):57-60.
Authors:HUANG Ji-wu  Yun QSHI  CHENG Wei-dong
Affiliation:1. Dept.of Electronics,Zhongshan University,Guangzhou 510275,China;2. NLPR,Institute of Automation,Chinese Academy of Science,Beijing 100080,China;3. Dept.of ECE,New Jersey Institute of Technology,Newark,NJ 07102,USA;4. Dept.of Electronics,Chengdu Institute of Meteorology,Chengdu 610041,China
Abstract:Where should invisible image watermarks be embedded in DCT domain in order for the image watermarks to be invisible and robust?Though many papers in the literature agree that watermarks should be embedded in perceptually significant components,DC components are explicitly excluded from watermark embedding.In this paper,a new embedding strategy and an algorithm applying the strategy for watermarking in DCT domain is proposed.Based on a quantitative analysis on magnitude of DCT components,we argue that more robustness can be achieved if watermarks are embedded in DC components since DC components have much larger perceptual capacity than any AC components.Applying this embedding strategy,an adaptive watermarking algorithm incorporating the feature of visual masking of human vision system is presented.Experimental results demonstrate that the embedding strategy is effective and the invisible watermarks thus generated are very robust.
Keywords:image watermarking  embedding strategy  visual masking  DCT  DC components
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《电子学报》浏览原始摘要信息
点击此处可从《电子学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号