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In the past two decades, reversible data hiding (RDH), also referred to as lossless or invertible data hiding, has gradually become a very active research area in the field of data hiding. This has been verified by more and more papers on increasingly wide-spread subjects in the field of RDH research that have been published these days. In this paper, the various RDH algorithms and researches have...
A new steganographic algorithm is proposed for JPEG images by modifying the block DCT coefficients. Firstly, an embedding algorithm called LSB+ matching is generated to approximately preserve the marginal distribution of DCT coefficients. We further divide the DCT coefficients into four frequency bands, including the direct current (DC), low-frequency, middle-frequency, and high-frequency. Via matrix...
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