Adapting Digital Watermark Algorithm Based on Chaos and Image Fusion

An adapting digital watermark algorithm based on the image fusion and chaos is put forward. The steps of the algorithm are: Firstly, the watermark image is pretreated in disorder using the chaos mapping. Then the NVF function of the carrier image is calculated. The strength of the watermark information is accommodated adaptively, and the watermark information is hidden in the carrier image by the way of the combination with the NVF function and the image fusion. Finally, the experimental results are evaluated using the Mutual Information (MI) and the Cross Entropy (CE). The proposed algorithm shown in this paper promotes the hidden visual effect, ensures the security of watermark, and at the same time promotes the robustness of watermark.