Oblivious Cocktail Watermarking by Sparse Code Shrinkage: A Regional- and Global-Based Scheme

Watermarking with oblivious detection and high robustness capabilities together is still a challenging problem up to now. The existing methods are either robust or oblivious but it is diicult to achieve both goals simultaneously. In this paper, oblivious detection is formulated as a blind source separation problem by regarding the hidden watermarks as noises. To keep high robustness, our non-oblivious cocktail watermark-ing scheme, which is very robust, is adopted to combine with the oblivious detection mechanism. The proposed oblivious cocktail watermarking can be applied to global watermark-ing and regional watermarking. Experimental results have demonstrated the powerfulness of our method.