基于二维小波变换的双彩色图像数字水印算法

在一般水印研究的研究上，提出了一种基于离散小波变换（DWT）的双彩色图像水印算法（DCIW），通过不同色彩空间的相互转换，利用二维DWT变换对图像进行多尺度分解，将彩色数字水印图像植入彩色图像中，并通过滤波过程，能将彩色水印图像完整地抽取出来，通过多项实验证明，该算法对剪切、有损压缩、平滑、放缩等操作均具有较强的鲁棒性。

Dual Color Images Watermarking Algorithm Based on Wavelet Transform

Digital watermarking techniques have been proposed as an effective way to protect copyright of multimedia data. From the study of general watermarking, a new algorithm of dual color images watermarking (DCIW) is presented to hide color watermark image into color images by multi_resolution wavelet decomposition . Several experiments show the good robustness of this algorithm to the common image processing,such as cropping, image compression, smoothing, zooming and so on.