关键词: 离散小波变换, 奇异值分解, 独立分量分析, Arnold置乱

Abstract:

This paper presents a digital image watermarking algorithm based on image-scrambling and ICA-DWT.Firstly,3-Level discrete wavelet transformation(DWT) is taken to the original image.Then Singular Value Decomposition (SVD) will be done to the low-frequency sub-image obtained from above transformation.Finally,watermark scrambled by Arnold transformation will be embedded into the low-frequency sub-image by using the ICA method.The experimental result shows that the algorithm has better robustness to image processing,image compression and some geometric transformations and the invisibility of watermark is achieved simultaneously.

Key words: discrete wavelet transformation(DWT);singular value decomposition(SVD);independent component analysis (ICA);arnold scrambling