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• W1995484676 abstract "In this paper, we propose a reversible data hiding scheme based on the varieties of coefficients of discrete cosine transformation of an image. Cover images are decomposed into several different frequencies, and the high-frequency parts are embedded with secret data. We use integer mapping to implement our 2-dimensional discrete cosine transformation. Thus, the image recovered from the modified coefficients can be transformed back to the correct data-hidden coefficients. Since the distribution of 2-dimensional DCT coefficients looks close to Gaussian distribution centralized at zero, it is a natural candidate for embedding secret data using the histogram shifting approach. Thus, our approach shifts the positive coefficients around zero to the right and the negative coefficients around zero to the left in order to leave a space to hide the secret data. The experimental comparisons show that, compared to Chang et al. and Lin et al.'s method, the embedding capacity and quality of the stego-image of the proposed method is a great improvement." @default.
• W1995484676 created "2016-06-24" @default.
• W1995484676 creator A5069386516 @default.
• W1995484676 date "2012-10-01" @default.
• W1995484676 modified "2023-10-01" @default.
• W1995484676 title "High capacity reversible data hiding scheme based upon discrete cosine transformation" @default.
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• W1995484676 doi "https://doi.org/10.1016/j.jss.2012.05.032" @default.
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