Novel Robust Watermarking Algorithm Based on SVD and DCT
Xiangjun Zhao · Journal of Chinese Computer Systems · 2009
In this paper,a robust watermarking algorithm is proposed,which is based on a discrete domain transform(DCT)and matrix singular value decomposition(SVD).First of all,the carrier image is processed by discrete cosine transform,and choosing some elements including the DC and its size equal to the significant watermark image;then,the SVD operation is respectively acted on the chosen information and the watermark image,four orthogonal and two diagonal matrices are received;finally,the three SVD matrices of the watermark image will be embedded in the three matrices of the carrier.The watermarked image is get after inverse SVD and inverse DCT transform.The experimental results proved that this method is robust.