A New Fractal Watermarking Scheme Based on Image Normalization
Geometirc attacks are the challenging problems for most image watermarking today.Such attacks are very simple to implement, yet they can defeat most of the existing watermarking algorithms without causing serious perceptual image distortion. In the paper,a new fractal watermarking scheme robust to geometric attacks is proposed based on image normalization and fractal coding.Firstly,the geometrically invariant space is constructed by using image normalization. Then,a significant region is obtained from the normalized image by utilizing the invariant centroid theory.Finally, the watermark is embedded into the self-similar blocks DCT transformed of the significant region by fractal. Experimental results show that the scheme is not only invisible and robust to common signals processing such as median filtering, sharpening ,noise adding, JPEG compression, etc, but also robust to the geometric attacks such as affine transform,local geometric distortion, etc.
fractal watermarking image normalization significant region DCT geometric attacks
MIAO Xi-kui SUN Jin-guang ZHANG Yu-han
Electronics and Information Engineering Department Liaoning Technical University, Huludao, Liaoning, China
国际会议
武汉
英文
830-834
2009-11-18（万方平台首次上网日期，不代表论文的发表时间）