An Asymmetric Digital Watermarking Algorithm Based on 2DFT

An improved watermarking algorithm is proposed to deal with public watermarking verification and large information reserves.This algorithm is based on two dimensional discrete Fourier transform(2DFT).The phase of the reference watermark is shifted randomly in the 2DFT domain to obtain many embedding watermarks.They are correlated with one another and have the same correlation with the reference on…