一类基于混沌振子的公钥数字水印算法

把被保护数字媒体看成噪声,将水印算法转换为强噪声背景下弱信号提取问题.在用混沌振子检测强噪声背景下弱方波信号模型的基础上,提出了一种除密钥外能公开一切细节的公钥鲁棒水印算法.在具体描述了算法细节后,对算法进行了模型可行性实验和抗一般图像处理攻击实验.实验结果表明,该算法是可行的,所设计的算法具有较好的鲁棒性和较强的抗攻击能力.

A Public-key Watermarking Scheme Based on Chaotic Oscillator

This paper presents a different idea that a watermarking scheme can be considered a weak signal detection in strong noise,while the protected digital work is viewed as noise.Based on detection method of weak square signal in strong noise with a chaotic oscillator,a public-key robust watermarking scheme is proposed,which can show all details except the private key.After the watermarking scheme is described,the model feasibility experiment and anti-attack ability experiments are done.Experimental results show that the algorithm is robust enough against attacks of those image-processing methods.