Digital Watermarking Algorithm based on Gauss Pyramid Decomposition 

Yan Qi, YongHui Yang, Chuang Gao 

School of Electronic and Information Engineering, University of Science and Technology Liaoning, Anshan, 114044 , China 

Abstract: In this paper, the watermark information is embedded and extracted in the discrete cosine trans-form domain, and the spread spectrum binary codes of the watermark image after the Gauss Pyramid decom-position is adaptively embedded in the middle frequency component near the low frequency. The experiment proves that the algorithm is simple and easy to be realized. It has strong robustness and better invisibility for the image processing of JPEG compression and clipping.

Keywords: Spread spectrum; Gauss Pyramid decomposition; Discrete cosine transform; Digital watermarking