一种基于DCT中频的图像水印技术  

An Image Watermarking Technique Based on DCT Middle-Frequency

作　　者：蔡汉添[1] 何军辉[1] 

机构地区：[1]华南理工大学电子与通信工程系,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2001年第12期57-60,共4页Journal of South China University of Technology(Natural Science Edition)

摘　　要：数字水印技术在数字产品的版权保护 ,使用监控 ,安全传输和保密通信等方面潜在巨大应用前景 .本文研究一种基于DCT中频的图像水印技术 .该算法根据JPEG量化表自适应地调整嵌入到图像DCT中频系数的水印信号的强度 .Watermarking technology possesses great potentials of application in the copyright protection of digital multimedia products as well as in data monitoring and communication security. An image watermarking technology based on DCT middle_frequency is introdnced in this paper. In this approach, the watermarks are embeded into the DCT middle frequency coefficients of the images adapted to the JPEG quantization table. The experiment results show that this technology meets the demand of transparency and robustness to a great extent.

关 键 词：数字图像水印 DCT 中频 水印嵌入 透明性 鲁棒性 数据加密 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]