Lossless Information Hiding in Images

5.3. Bitplane Flipping–Based Lossless Hiding Schemes

In this section, we introduce the first reversible data hiding scheme for BTC-compressed gray-level images proposed by Hong et al. [9], and its improved scheme by Chen et al. [10]. Then, the reversible data hiding scheme [13] for BTC-compressed images based on bitplane flipping together with histogram shifting of mean tables is introduced, which is proposed by the author of this book.

Here, the original AMBTC method is used in all these methods, assuming that the M × N-sized 256-gray-level image X is divided into nonoverlapping m × n-sized blocks, i.e., X = {x^(ij), 1 ≤ i ≤ M/m, 1 ≤ j ≤ N/n}. The pixels in each block are individually quantized into two-level outputs in such a way that the mean ...