ABSTRACT
This chapter discusses digital watermarking and focuses on reversible data hiding and information forensics. By the late 1990s, digital watermarking had been an active research area for signal processing and communication for years. The digital watermarking scheme had been an important technology. That is, the existence of a digital watermarking signal can be utilized as an indication to protect the ownership. The chapter also discusses why a watermark signal should be embedded into the DC components of, say, a digital image. Although many papers in the literature have agreed that watermarks should be embedded in perceptually significant components, the DC components have been explicitly excluded from watermark embedding for a while. A significant and successful watermarking scheme was proposed and conducted by I. J. Cox et al. Digital watermarking schemes have been useful in our modern life.
