利用小波包变换和误差扩散的打印扫描图像水印算法
Watermarking Algorithm for Print-Scan Based on Wavelet-Packet Transform and Error Diffusion
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摘要: 提出了一种基于小波包变换和误差扩散的打印扫描图像水印算法。首先对图像进行三层小波包分解,并将其作为水印嵌入到分解后的高频分量的低频子带,然后进行小波包重构得到嵌入水印的图像,再运用改进的噪声平衡误差扩散算法加网得到含水印的半色调图像。实验表明,该算法对于打印扫描过程的无意攻击具有良好的鲁棒性。Abstract: A watermarking algorithm for print-scan based on wavelet packet transform and error diffusion is introduced.This method manipulates the original image by three layer wavelet packet transform,and adds watermark onto the low frequency subband by high frequency components,then the image by modified noise-balanced error diffusion halftone image screening.The experimental results show that the algorithm is high robust against for print-scan.
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