一种基于DWT和DCT的自适应盲水印算法

Based on the DWT and DCT Block Adaptive Blind Watermarking Algorithm

研究鲁棒性水印算法一直是数字水印技术发展的重要方向,文中根据Watson视觉模型推导出的一种可以直接应用于DCT域的自适应归一化掩模作为水印嵌入强度,利用相邻的DWT和DCT块之间的关系把二值水印嵌入到灰度图像中,提取水印时不需要原始图像,实现了盲提取。实验结果表明,本算法在不可见性和鲁棒性方面具有良好性能。

Researching robust watermarking algorithm has been an important development direction in the field of digital watermarking technology. Embedding strength was according to that Watson visual model deduced adaptive normalization of the mask,which can be derived directly applied to a DCT compressed domain. It was used DWT and DCT the relationship to embed the two values watermark to gradation images in this paper. The watermarking is extracted without the original image. Experimental results indicate that the algorithm had very good performance at invisibility and robustness.