5.6. Summary
This chapter discusses lossless information hiding schemes for BTC-compressed image. These schemes can be broadly classified into three categories, i.e., bitplane flipping–based schemes for BTC-compressed grayscale images, mean coding–based schemes for BTC-compressed grayscale images, and lossless data hiding schemes in BTC-compressed color images.
The first category includes three schemes, i.e., original bitplane flipping–based scheme, improved bitplane flipping–based scheme, and bitplane flipping–based scheme with histogram shifting of mean tables. The third method is proposed by us. Through histogram shifting of mean tables, our scheme can maintain the same PSNR values as the original AMBTC technique. We embed secret bits in two ...
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