基于小波变换的彩色图像双盲水印算法

A dual-blind-watermark algorithm based on wavelet transform for color image

在一般水印研究的基础上,提出了一种基于离散小波变换(DWT)的彩色图像双盲水印算法,利用二维DWT变换对彩色图像的3个彩色分量分别进行多尺度分解,然后将两个加密后的二值水印图像自适应地嵌入到3个彩色分量的DWT系数中.通过滤波过程,能够将这3个二值水印完整地提取出来,并且水印的提取不需要原始图像.实验结果表明:使用该方法嵌入的数字水印对常见的图像处理有较强的鲁棒性,能够使数字媒体的版权得到更好的保护.

A new algorithm of dual blind-watermark is presented to hide two encrypted bilevel watermark images into three color components in DWT domain by multi-resolution wavelet decomposition. The algorithm can extract the two bilevel watermarks without the original image. The experimental results show that the embedded watermarks are robust enough against the general image processing techniques.