Digital Watermarking System Based on the Standard Chaotic Maps Switch

The standard chaotic maps model is first built to produce many kinds of chaotic sequence based on changing parameters during different time durations. The chaotic signal is added into the block middle-frequency DCT coefficients which is selected by visual model, by the same time taking a modular operation on the sum and embedding the result of the modular operation in the iteration of the standard chaotic generating systems. In the correlative detector, the chaotic sequence is retrieved from the watermarking image by using the corresponding chaotic model. The simulation results show that the performance of this watermarking system is better than that based on single chaotic map.