一种基于数字混沌的图像水印算法

Image Watermarking Algorithm Based on Digital Chaos

从数字水印的安全性角度出发,提出了一种基于logistic数字混沌的图像水印算法。考虑到logistic混沌序列具有易于产生、数量极多和保密性好等特点,因此本水印算法的嵌入水印信息使用了混沌序列。水印嵌入和提取过程均在小波域中实现。实验结果表明该水印算法具有好的安全性和较强的抗噪声、抗压缩鲁棒性。

Due to security of digital watermarking, the paper proposes a watermarking algorithm based on logistic digital chaos, which are used in watermarking algorithm as embedded watermarking information for they have many merits, such as easily building, uncountable number, and safety of secrecy. The digital watermarking is done in the wavelet transform domain. Experimental results demonstrate that the watermarking algorithm is very safe and is robust against noise and lossy compression.