摘要
在对小波域数字水印的嵌入算法研究的基础上,利用混沌序列所特有的不可预测性,提出了一种基于混沌映射的小波域数字图像水印算法。首先在密钥控制下,对二值原始水印图像进行置乱,再产生一混沌序列对其加密,然后将水印信息嵌入原始图像的小波域的低频系数,使得水印方案具有双重安全性。实验表明,该算法对JPEG压缩、图像加噪和剪切等攻击方法具有较强的鲁棒性,并且实现了盲检。
A new watermarking algorithm is proposed, based on chaotic map in DWT -domain. Because the chaotic sequences are unpredictable, this algorithm＇s secret key has the features of uniqueness. Firstly, scramble the watermark with chaotic sequences. Secondly, develop another chaotic sequence to encrypt the image and embed the watermark data into the low frequency coefficients of the original image wavelet domain. Therefore, the watermarking security is increased and that the algorithm has better robustness and can cutting. the embedded watermark is invisible. The simulation shows resist ordinary image processing, i.e. JPEG compression,
出处
《武汉理工大学学报（信息与管理工程版）》
CAS
2005年第5期46-48,共3页
Journal of Wuhan University of Technology：Information & Management Engineering
基金
北京大学视觉与听觉信息处理国家实验室基金资助项目(2003005)
关键词
数字水印
混沌映射
小波变换
鲁棒性
digital watermarking
chaotic sequence
wavelet transform
robustness
