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An Improved Reversible Data Hiding Scheme Based On Neighboring Pixel Differences

In 2013, Tsai et al. proposed a reversible data hiding scheme based on neighboring pixel differences. Although their scheme has better quality than histogram shifting based typical schemes, the hiding capacity is smaller than other schemes. In this paper, an improved Tsai et al.'s scheme is proposed by using three neighboring pixel differences and an absolute value of a difference. In our experimental results, the hiding capacity and image quality of the proposed scheme is superior to their scheme.