基于DWT域的混沌置乱二值图像数字水印新算法

Novel Binary Image Digital Watermarking Algorithm Based on DWT and Chaotic Scrambling

提出了一种基于DWT(Discrete Wavelet Transform)域有意义二值图像数字水印新算法.利用广义猫映射产生的混沌序列对水印序列的嵌入位置进行置乱,增加了嵌入水印的安全性;并利用改正的二值运算方法将水印嵌入到图像深层小波域的低频子图中.水印的检测不需要原始图像.大量仿真结果证明了该算法嵌入的数字水印既具有很好的隐蔽性,又具有很理想的鲁棒性.

A novel meaning binary image digital watermarking algorithm based on DWT is proposed. The proposed scheme utilized chaotic sequences generated by general cat map to scramble the watermarks embedding positions, so that the security of embedding watermarks was enhanced. The improved binary operation methods was utilized, and watermarks are embedded to the low frequency coefficients of deep wavelet domain. The original picture is not required for detecting the watermarks. The experimental results demonstrates that the embedded watermarks are invisible and this proposed watermarking algorithm is robust against many common attacks.