基于混沌序列和HVS的盲数字水印算法

A BLIND WATERMARKING ALGORITHM BASED ON HVS AND CHAOTIC SEQUENCES

提出一种针对彩色图像的基于混沌系统和人类视觉系统HVS(Human Visual System)的数字水印算法。通过该算法将二值水印经混沌系统加密后嵌入到彩色图像的蓝色分量B的小波系数中,在水印提取时根据密钥可以实现盲提取。实验结果表明,该算法对常用的图像处理如JPEG压缩、加噪、剪切和滤波等攻击具有较好的鲁棒性,取得了不可见性和鲁棒性的良好折中,同时盲检测使得水印检测的可靠性得到了很大的提高。

A digital watermarking algorithm for colour image based on human visual system （HVS） and chaotic sequences is proposed. In this algorithm, the binary watermark is encrypted by chaotic sequences, and then the watermark image is added into the wavelet coefficients of blue component of the original colour image. The watermark could be extracted according to the secret key, and that was blind watermarking extracting. Experimental results show that the proposed method is robust against the attacks of general image processing methods such as JPEG compression, noise, cut and filtering, and receives a good tradeoff between invisible and robustness, meanwhile the blind detection improves the dependability of detecting the watermark.