Correlation-aware data hiding based on spread spectrum embedding

In this paper, we present a correlation-aware spread spectrum (CASS) embedding scheme for image data hiding. The basic idea is to explore the bit information and the correlation between the host signal and the watermark signature code during embedding. We show that this correlation-aware embedding approach could yield watermark decoding performance improvement at the decoder side. To reduce the interference observed in CASS and thus improving the decoding performance, we further propose the correlation-aware hybrid spread spectrum (CAHSS) data hiding scheme by incorporating the idea of improved spread spectrum (ISS). The simulation results reveal the superior watermark decoding performances of the proposed correlation-aware schemes.