Robust watermarking scheme with side information

Digital watermarks have been proposed for the copyright protection of multimedia products. Most schemes were performed primarily for fidelity considerations, and not specifically to improve the detector performance. In this paper, a robust and blind watermarking scheme is presented. The concept of communication with side information was applied at the encoder to improve the probability of detection within acceptable fidelity, and the template matching technique was employed to estimate the undergone attacks in attacking channel. This scheme is optimized by optimal design of the encoder to match with the media content and the decoder to adapt to the attack channel state. Experiments show that our method is robust against some common attacks such as filtering, compression, rotation, scale, and translation. It can be applied to both color and gray images.