Reversible data hiding scheme with edge-direction predictor and modulo operation
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Since the first histogram shifting technique was proposed by Ni et al., many histogram based data hiding methods were proposed to improve their scheme. One of the methods is using difference value between cover image and prediction image. Another method is using two point pairs and absolute value for improving Ni et al.’s scheme. In this paper, novel reversible data hiding scheme with edge-direction predictor and modulo operation was proposed for improving histogram shifting technique with 3 cases. We considered as much as possible around pixels by using edge-direction predictor with odd and even line embedding Also, we utilize two point pairs and absolute value at the same time by using modulo operation with wrap around. In the experimental results, the proposed scheme shown a good quality image result about 48dB as similar as other schemes and enhanced hiding capacity over 50 % than other schemes.
KeywordsSteganography Reversible data hiding Histogram shifting Modulo operation Edge-direction predictor
This work was supported by Institute for Information & communications Technology Promotion (IITP) grant funded by the Korea government (MSIP) [No. 10041145, Self-Organized Software platform (SoSp) for Welfare Devices] and by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2015R1A2A2A01006824).
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