文档介绍：一种基于DCT数字水印新算法
摘要:为了克服高复杂度算法同时能使数字水印具有较好的鲁棒性与掩蔽性,该文借助图像在DCT域实现的算法复杂度低且能很好的与人类视觉特性相结合,提出了一种基于DCT域自适应数字图像水印新算法,该算法采用随机性较强的高斯序列作为嵌入水印,并且利用图像子块特征分类结果对水印嵌入强度进行自适应调节,从而在确保水印不可见的同时有效地增强了水印的强度。实验表明,该算法对常见的信号处理如加噪、旋转、滤波等有较强的鲁棒性。
关键词:数字水印; DCT变换; 高斯序列
中图分类号:TP18 文献标识码:A文章编号:1009-3044(2011)26-6494-03
A New Algorithm Based on the DCT Digital Watermark
LIU Yun-jie, ZHOU Li-jian, LI Jun-wei
(College munication and Electronic Engineering, Qingdao Technological University, Qingdao 266033, China)
Abstract: In order to e the plexity of digital watermarking algorithm and make the digital watermarking own good robustness and masking performance, this paper bases on the image in the DCT domain of the realization of the plexity low and bine with the human visual characteristics better preferably, we propose a DCT-domain adaptive digital image watermarking algorithm using Gaussian random sequence as a strong embedded watermark and the image sub-block results of the classification feature of embedding strength adaptively adjust, ensuring the invisible watermark while effectively enhancing the watermark strength. Experiments show that this algorithm to mon signal processing such as added noise, rotation has strong robustness.
Key words: digital watermarking ; DCT transform; gaussian sequence
随着网络的快速发展,多媒体数字作品(图象、视频、音频)的版权保护成为一个迫切需要解决的问题。而数字水印(digital watermark)技术能有效地实现版权保护,如今已是多