基于DCT和DWT的彩色数字水印算法

An Algorithm of Color Image Digital Watermark Based on DCT and DWT

提出了一种基于离散小波变换和离散余弦变换的彩色数字水印算法。首先对嵌入图像进行猫脸变换和离散余弦变换进行置乱,然后将变换后的水印图像嵌入经过离散小波变换的宿主图像中。实验证明,基于该算法实现的嵌入水印后的宿主图像能够很好满足安全性、隐蔽性、鲁棒性等要求。

Proposes an algorithm of color image digital watermark based on DCT and DWT.Make the arnold transformation and DCT to embedded image,which is embedded host image which is transformed by DWT.Experimental show that,the algorithm is of security,invisibility,robustness and other requirements.