Abstract:
For the dual digital watermarking, the information capacity to be embedded is relatively large and the two watermarks easily interfere with each other. Aiming at these characteristics, this paper proposes a robust dual digital watermarking algorithm by means of function mapping mechanism. In this algorithm, a kind of function mapping relationship between the first-level and the second-level watermarks is established. Thus, only one watermark is required during embedding watermarking. Then, the watermark is embedded into host image by using the discrete wavelet transform, discrete cosine transform and singular value decomposition technology. Experimental results show that the proposed scheme has better transparency, and stronger robustness to some common digital signal processing and geometrical attacks.