Watermark security via wavelet filter parametrization
Peter Meerwald, Andreas Uhl · 2002
We propose to use secret, key-dependent, parametric, wavelet filters to improve the security of digital watermarking schemes operating in the wavelet transform domain. We show that the parametrization of wavelet filters can be easily integrated into existing wavelet-based watermarking algorithms, resulting in improved security without additional computational complexity. Both robustness and imperceptibility are adequate for many applications.