Lossless Information Hiding in Images

4.6. Summary

This chapter discusses lossless information hiding schemes for VQ-compressed image. These schemes can be broadly classified into two categories, i.e., information hiding during VQ encoding and information hiding during VQ-index coding. The first category mainly includes MFCVQ-based and SMVQ-based schemes. The first category embeds information during VQ encoding, which can recover the VQ-compressed version after extraction of the embedded information. The second category views the index table as the cover object and embeds information during lossless index coding. In general, the schemes in the first category obtain worse stego images than index coding–based schemes. Furthermore, most of the index coding–based schemesnot only can further ...