DCT域水印嵌入新策略和算法

A NEW ALGORITHM FOR WATERMARKING IN DCT

本文提出一种新的水印嵌入策略 ,将水印信号嵌入到原始图像块DCT域的AC分量和DC分量中。基于该策略提出了一个自适应图像水印算法。该算法先把原始图像和水印图像分别进行分块DCT ,然后将水印信号的AC分量和DC分量以不同的能量分别嵌入到原始图像块DCT域的AC分量和DC分量中。实验结果表明 。

In this paper,a new strategy by which embeds watermarks are embedded into AC components and DC components of original image blocks in DCT is proposed.An algorithm for adaptive image watermarking based on this strategy is also proposed.First,the proposed algorithm splits the original image and watermark image into some blocks and transformed them by DCT respectively.Then, AC components and DC components of watermark with different strength are embedded into AC components and DC components of original image blocks in DCT .Experimental results show that the proposed algorithm is possessed of good robustness.