A reversible high capacity data hiding scheme using pixel value adjusting feature
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In this paper, we propose a new reversible data hiding scheme that uses pixel value adjusting feature. It has two phases. In first phase, It scans the image diagonally from left to right and hides the some of the secret data into the odd valued pixels. In second phase, it also scans the image diagonally but in right to left order and hides the secret data into the even valued pixels. In the second phase, some of the pixels used for hiding in the first phase are again used to hide the secret data but this time their values are positively changed. In other words, if a pixel value is decremented in the first phase; this time, it is incremented so that more secret data can be embedded and the quality of the stego-image is also maintained. Though, our scheme has some overhead in hiding the secret data, yet it is able to provide good quality with high capacity. The scheme is very simple because at the time of hiding it doesn’t perform much computation; rather it simply increases or decreases the pixel value. Thus, it has very low computational complexity. The experimental results show that our proposed scheme is superior to many existing schemes.
KeywordsReversible data hiding Adjusting feature Concealable pixel
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