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

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