基于小波变换的双水印算法

A Dual-Watermark Algorithm Based on Wavelet Transform

结合数字水印空间域和频域算法的特点 ,本文提出一种在图像小波变换域嵌入双水印的算法。在图像变换域低频分量嵌入识别水印 ,高频分量嵌入确认水印 ,图像版权所有者拥有单一密钥。试验结果表明 ,该水印算法具有良好的不可见性和稳健性 。

Combining with the characteristics of the spatial domain algorithm and the frequency domain algorithm of digital watermarks, this paper presents a new method of embedding two watermarks into the wavelet transfer field of the image. This method embeds the discriminating watermark into the low-frequency band and the confirmable watermark into the high-frequency band of the image transfer field, and the image copyright owner can hold a single key. The experiment shows that this method is of better invisibility and robustness, and can effectively protects image copyrights.