Color image watermark based on block-DCT and Tucker decomposition
Jiliu Zhou · Journal of Computer Applications · 2010
This paper proposed a new color image watermarking algorithm,which embedded the watermark into the DC coefficients of R,G,B channels through block-DCT and Tucker decomposition.First applied 8×8 block-DCT to R,G,B channels respectively,and used the DC coefficients of each block to construct a 3-level tensor.Embedding the watermark into the core tensor,which was got from Tucker decomposition,can diffuse the watermark into the DC coefficients of R,G,B.The experimental results indicate that this algorithm is robust to compression,noise,filtering and geometric distortion.And the algorithm is better than the algorithm based on YCbCr color space in invisibility.