A Semi-Blind Watermarking Scheme for Images using a Tree Structure

In this paper, we embed the watermark in a tree structure in the Discrete Wavelet Transform domain. For watermark embedding, the two level DWT decomposition of an NxN gray scale image I is computed. The same PRN sequence is embedded into the DWT coefficients higher than a given threshold T1 in the LL2 and HH2 bands. The watermark is also embedded into the… CONTINUE READING