摘要
数字水印技术是一种在数字多媒体中嵌入数字信息,从而保护媒体版权的方法,它已经成为保护数字作品版权的重要手段。本文利用扩频技术原理,提出了一种DCT域数字水印算法,该算法用伪随机序列对二值水印图像进行置乱扩频,然后根据人类视觉特性将调制信息嵌入载体图像DCT域中。仿真结果说明这种数字水印算法具有很好的安全性和稳健性。
Digital watermarking is an approach for copyright protection by a embedding information into digital multimedia. It has become an essential way to protect digital copyright. This paper expounds a digital watermarking algorithm based on DCT by using the technology of spread spectrum .The binary watermark is permuted by pseudo-random sequence,then embeds the sequence into DCT domain of the carried image in the term of human visual model. Experimental results show that the algorithm is invisible and robust to common distortions
出处
《微计算机信息》
北大核心
2008年第27期189-191,共3页
Control & Automation
基金
国家自然科学基金(基于分数阶傅立叶变换的图像数字水印理论和应用研究)(60472044)
