Robust Digital Image Watermarking Based on Video Wavelet Transform

In this paper, we introduce a 3D wavelet transform based robust watermark casting scheme against shearing attack for digital images. Based on the characteristics of the image theory and human visual system, the proposed method make use of the there-dimensional video wavelet transform to split the image to a sense of image videos and the watermark is adaptively weighed to the different positions of the middle frequency region. The method makes use of the characteristics of image two-dimensional wavelet transform and the person´s sense of vision and shows excellent advantage against shearing attack. The method could show the watermark clearly when half of the image has been cut. Experimental results show this method excellent robustness for image shearing. The goal of this paper is to achieve robust digital image watermark against shearing. The algorithm achieves the robustness to the shearing attacks.