Blind watermarking based on henon chaos system
A new blind watermarking algorithm based on Henon chaos system and lifting scheme wavelet is proposed. Two dimensional reversible nonlinear Henon chaos system that is dealt with mould operation is utilized to scramble the watermarking images by chain type; then the scramblingwatermarking is embedded into the lifting scheme wavelet coefficients using the pseudorandom of the two dimensional Henon chaotic sequence. This watermarking embedding algorithm optimally utilizes the pseudorandom of the Henon chaos system, and also the embedding position is selected more simply and reasonably.
All parameters such as controlling parameter of Henon chaos system x0, y0, s0 and embedding intensity parameter S are encrypting key which further increase the security of the watermarking algorithm. Meanwhile, the different selection of embedding intensity parameter can easily balance the invisible and the robust of the watermarking. Experimental results show that this method is invisible and robust against some usual attacks such as JPEG, cropping, adding noise, filtering and so on.
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