A digital watermarking algorithm based on wavelet transform and singular value segmentation of the watermark image

Digital watermarking is a topic that has recently gained increasing attention all over the world, we divide singular values of watermark image into two parts, then embed them into the LL and HH subband of DWT domain of the original image. Emulational experiments are done in Matlab, Experimental results demonstrate that the watermark is invisible and robust against kinds of classical attacks.