New fractal watermarking scheme
Xikui Miao · Computer Engineering and Applications Journal · 2011
A new fractal watermarking scheme robust to geometric attacks is proposed based on image normalization and fractal.The geometrical invariant space is constructed by using image normalization.A significant region is obtained from the normalized image by utilizing the invariant centroid theory.The watermark is embedded into the self-similar blocks of the significant region by ajusting the DCT intermediate frequecy coefficients by fractal.Experimental results show that the scheme is invisible and robust to common signals processing and geometric attacks.