Abstract
We describe a new watermarking scheme based on
intelligent shaping of a digital watermark using
Genetic Programming (GP). The proposed method, in
addition to achieving a superior tradeoff between
watermark robustness and imperceptibility, is also able
to structure the watermark in accordance with an
anticipated attack. This has been achieved by
simultaneously hiding the watermark as well as
spreading and fusing it in such a way to resist the
conceivable attack. Robustness versus imperceptibility
tradeoff and increase in bit correct ratio after
attack, have been employed as the optimisation criteria
in the GP search. The concept of bonus fitness has been
used to implement multi-objective fitness based GP
evolution. Experiments on standard images indicate that
such watermark shaping functions could be developed
that are cover image independent and enhance
imperceptibility. They offer high resistance against
removal and interference attacks of Checkmark
benchmark.
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