Journal
SIGNAL PROCESSING
Volume 148, Issue -, Pages 41-47Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.sigpro.2018.02.002
Keywords
JPEG image; DCT block; Frequency selection; Block selection; Reversible data hiding
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Funding
- Natural Science Foundation of China [61572452, U1636201]
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The joint photographic experts group (JPEG) is the most popular format of digital image. In this paper, a novel reversible data hiding scheme based on JPEG image is proposed. In JPEG image, quantified DCT (discrete cosine transform) coefficients with different frequencies will yield different capacities and embedding distortions. To reduce the total distortion for the marked image, we select coefficients from frequencies yielding less distortions for embedding, and then an advanced block selection strategy is applied to always modify the block yielding less simulated distortion firstly until the given payloads are completely embedded. Experimental results show that the proposed method can keep good visual quality with small bitstream expansion. (C) 2018 Elsevier B.V. All rights reserved.
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