A novel optimal decoding algorithm of multibit multiplicative watermarks
Lihong Cui, Lina Zhao, Wenguo Li · 2011
This paper presents a novel optimal watermark decoding algorithm of multibit multiplicative watermarks using Bessel k form of density function (BKF). In the proposed algorithm, the wavelet coefficients of detail subband are assumed to obey BKF, the classical spread spectrum watermarking is used for watermark embedding, the optimal multi-bit watermark decoding comes down to a maximum likelihood (ML) detection. Experimental results show that the proposed algorithm obtains the optimal watermark decoding.