A time-frequency inspired robust image watermarking

With the development of the Internet and the multimedia tools, reproduction and redistribution of digital data, such as images, audio and video have become easier than ever. This ease of access to digital data brings with itself the problem of copyright protection. Watermarking has been proposed as a solution to this problem. Two major methods have been used for watermarking; spatial and spectral domain methods. In this paper, we introduce a new framework for watermarking digital images that is inspired by the joint spatial-spectral transforms such as the Wigner distribution. The embedding and the detection algorithms in this joint domain are defined. The robustness of the proposed algorithm under attacks is illustrated.