A watermarking method combined with Radon transform and 2D-wavelet transform

In this paper, a new image digital watermarking algorithm which combined the Radon transform with 2D-wavelet transform is proposed. And the finite Radon transform has been adopted to make it possible for radon transform to carry out invertible transform for digital images. The point singularity is transformed into the line singularity by the Radon transform. And the 2D-wavelet is very efficient in dealing with the point singularity. Experimental results demonstrate that the proposed algorithm has good performance in invisibility and robust, especially in brightness enhancement and weakening.