Reversible data hiding in JPEG image based on DCT frequency and block selection.
Signal Processing(2018)
Abstract
•Select coefficients from frequencies yielding less distortions for embedding according to quantization table.•Advanced block selection strategy is applied to always modify the blocks yielding less simulated distortions for embedding preferentially.•Keep good visual quality with small bitstream expansion for JPEG images.
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Key words
JPEG image,DCT block,Frequency selection,Block selection,Reversible data hiding
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