Reversible Data Hiding in Halftone Images Based on Dynamic Embedding States Group

Document Type

Article

Publication Date

7-1-2021

Abstract

In many reversible data hiding (RDH) methods for halftone images, the traditional embedding process embeds a 1-bit secret message into each embeddable pixel or pattern. To improve the embedding efficiency and payload, we propose an RDH method used in halftone images based on the dynamic embedding states group (DESG), which can embed at least 1 bit of secret messages per embeddable pixel or pattern. First, by exploiting the statistical features of 4 times 4 patterns and the state sequences in each image, the DESG is constructed dynamically, including n embedding states with their state patterns and state sequences. Then, secret messages are encoded by matching the longest common subsequence according to the DESG, which are split into several state sequences. The state sequences are embedded by Markov transitions between these n changing state patterns. Finally, reversibility is achieved by recording the DESG as the overhead information in RDH. Experiments show that the construction of DESG can improve the embedding efficiency under the same number of embeddable pixels or patterns, and the visual distortion is also significantly reduced by flipping fewer pixels.

Identifier

85104406911 (Scopus)

Publication Title

IEEE Transactions on Circuits and Systems for Video Technology

External Full Text Location

https://doi.org/10.1109/TCSVT.2020.3032685

e-ISSN

15582205

ISSN

10518215

First Page

2631

Last Page

2645

Issue

7

Volume

31

Grant

201804020068

Fund Ref

National Natural Science Foundation of China

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