A Chaos Based Blind Digital Image Watermarking in The Wavelet Transform Domain
An effective watermarking algorithm based on the chaotic maps
and the discrete wavelet transform for gray scale images is
proposed. In the algorithm, the chaotic maps are employed to
generate a key space with the length of 1040 numbers to increase
the degree of security. Additionally, the XOR operator has been
replaced by the mutation process for embedding the images. This
improved mutation operator has been used to encrypt the
watermark logo. Additionally, the upgraded mapping method
determines the location of, DWT, Discrete Wavelet Transform,
coefficients where the watermark is embedded. To evaluate the
robustness and effectiveness of the proposed method, the effect
of several attacks has been simulated on the hidden image.
Simulation results indicate that the new algorithm can preserve
the hidden information against geometric and non geometric
attacks.
Keywords: Blind Digital Image Watermarking, Chaos, Discrete Wavelet Transform, Chaotic Map, Mutation Operation
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