| 摘要 |
A method for digital content adaptive watermarking robust against general affine transforms, cropping and compression is disclosed. The method is based on a wavelet domain additive watermarking with a multiresolution perceptual mask (11) determined by the stochastic noise visibility function NVF of the cover image x. It is shown how to encode messages b and how to design the periodic watermark w in order to recover, based on the watermark Fourier magnitude spectrum F(w), general affine transform and compression attacks. Furthermore, it is demonstrated that the method is flexible and compatible with any message encoding technique and in particular with turbo codes, BJCR-, log-MAP and max-log-MAP decoders and with low-density parity check codes. |
