Abstract:

To study on the superiority and flexibility of watermarking algorithms in multiwavelet domain, on base of detailed analysis of the decomposed coefficients of BOR(Balanced Optimal-Reconstruction) multiwavelet,  the “layer” concept of an image in MWD(Multi-Wavelet Domain) is proposed. For this charater, data can be hidden in different layer subimages. An adaptive blind watermarking algorithm is put forward to embed a binary image into the first layer subimage according to above trait. Experimental results show that compared with the algorithm in Haar domain, the given method has better imperceptibility and higher robustness against image processing attacks.

Key words: balanced optimal-reconstruction(BOR) multiwavelet, layer characteristic, digital watermarking, robustness