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Lossless Information Hiding in Images by Shi-Ze Guo, Zhe-Ming Lu

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3.5. Summary

This chapter has discussed transform domain lossless information hiding schemes, including IntDCT-based schemes and integer DWT-based schemes. Before introducing then, we introduced some related concepts and requirements for lossless information hiding, and gave a brief overview of transform domain–based information hiding.
With regard to IntDCT-based schemes, we have introduced three Yang et al.'s schemes, i.e., the companding technique–based scheme, the histogram modification–based scheme, and the adaptive coefficient modification–based scheme. The first scheme takes advantage of the bit-shift operation in the companding process to achieve high watermarking capacity and good quality of watermarked images. To solve the over- and underflow ...

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