基于数字调制技术的图像数字水印算法

AN IMAGE WATERMARKING ALGORITHM BASED ON DIGITAL MODULATION TECHNOLOGY

提出一种新颖的基于数字调制技术的图像数字水印算法。将数字水印的嵌入与提取建模为通信过程,基于通信理论的线性、非线性数字调制技术,给出新的图像数字水印算法:将图像作为载体信号,水印作为待传输信号,并调制到载体信号上。算法既可在时域嵌入水印,也可在频域嵌入水印。同时通过典型实例,对算法进行分析与鲁棒性测试,包括噪声测试、JPEG压缩测试、剪切测试等,测试结果表明算法具有较好的安全性和鲁棒性。

A novel image watermarking algorithm based on digital modulation technology is proposed in this paper,which models the embedding and extraction of watermarking to the communication process,derives the new image watermarking algorithm on the basis of linear and nonlinear modulation technologies of digital communication theory：where the image is employed as the host signal while the watermarking information as the objective signal to be transmitted which will be modulated onto the host signal.The proposed algorithm can embed watermarking either in spatial domain or frequency domain.Detailed analyses and robust tests on this algorithm,including noise test and JPEG compression test as well as chopping test,are also given through typical instance at the same time;test results indicate that it has preferable capabilities in security and robustness.