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Robust watermarking of digital images based on chaotic mapping and DCT

In this paper, a new robust watermarking scheme is presented. The algorithm is based on a chaotic function and a correlation method for detection, operating in the frequency domain. The proposed scheme is blind and comparing to other chaos related watermarking methods, experimental results exhibit satisfactory robustness against a wide variety of attacks such as filtering, noise addition, geometric manipulations and JPEG compression with very low quality factors. The scheme also outperforms traditional frequency domain embedding both in terms of robustness and quality.