Abstract
This paper presents a lossless data hiding scheme for concealing message in each block of discrete cosine transform (DCT) coefficients. Our proposed improves the Chang et al.’s scheme for obtaining higher performance in terms of embedding capacity and image quality. In our scheme, two neighbor coefficients which are near to zero as an group are selected in each block, and then, hiding the message into each group. The coefficient is modified by one unit; therefore, the stego-image can keep the high image quality. Experimental results show that the proposed scheme not only provides better performance than that of previous works but also achieves coefficients reversibility.
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Acknowledgment
This work was supported in part by Ministry of Science of Technology, Taiwan, Under Contract MOST 105-2221-E-153-010.
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Weng, CY., Huang, CT., Kao, HW. (2018). DCT-Based Compressed Image with Reversibility Using Modified Quantization. In: Pan, JS., Tsai, PW., Watada, J., Jain, L. (eds) Advances in Intelligent Information Hiding and Multimedia Signal Processing. IIH-MSP 2017. Smart Innovation, Systems and Technologies, vol 81. Springer, Cham. https://doi.org/10.1007/978-3-319-63856-0_27
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DOI: https://doi.org/10.1007/978-3-319-63856-0_27
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