Abstract: This paper proposes a watermarking algorithm based on morphological Haar wavelet transform. The algorithm runs morphological Haar wavelet transform to blocks of carrier image. Embedded and detected watermarking is carried out to sub-blocks in the domain of morphological wavelet. A pixel of watermarking image is embedded in a sub-block. The algorithm can obtain watermarking quickly for blind extraction. Experimental results show that the proposed algorithm has some good performances such as simple, fast, improved invisibility and robustness, and good resisting noise in comparison with block DCT and block DWT.

Key words: block DCT, block DWT, Haar wavelet transform, watermarking, blind extraction

摘要： 提出了一种基于形态Haar小波变换的数字水印算法。该算法对载体图像按分块进行形态Haar小波变换，水印的嵌入和提取在子块的形态小波域中完成，每个子块嵌入水印的一个像素信息。该算法能实现水印的快速盲提取。实验证明，与分块DCT法和分块DWT法相比，算法不仅简单快速，而且大大提高了水印的不可觉察性和鲁棒性，在抵抗噪声攻击方面更有优势。

关键词: 分块离散余弦变换, 分块离散小波变换, Haar小波变换, 数字水印, 盲提取