一种基于小波包变换的盲数字水印算法

A Blind Digital Watermarking Algorithm Based on Wavelet-packet Transform

提出了一种基于小波包变换的盲数字水印算法,该算法首先对图像进行小波包分解,并根据视觉感知特性将作为水印的二值图像嵌入到分解后的高频分量中,再进行小波包重构得到嵌入水印的图像。实验结果表明,该算法添加水印后的图像对于压缩、噪声、中值滤波、几何裁剪等处理具有很强的稳健性。

In this paper, a blind watermarking algorithm for digital image based on waveletpacket transform is introduced. This algorithm manipulates the original image by waveletpacket transform, then adds watermark onto the important wavelet coefficients located in the high frequency subband based on human visual system. The experiment results show that the watermarking is robust and practicability to the common image processing techniques.