Difference expansion (DE) has been widely used for reversible data hiding. In this work, a new DE based scheme is presented that uses consecutive, overlapping pairs, instead of the non-overlapping pairs or triads used by traditional DE derivatives. The scheme is superior to the existing approaches, both in capacity and PSNR terms. By applying multiple runs of the embedding process, a significant capacity gain is obtained at the expense of lower quality.
Difference expansion (DE) has been widely used for reversible data hiding. In this paper a novel transform which embeds two bits of information in a triplet of coefficients is presented. This transform can be applied in spatial or frequency domain and induces minimum distortion to the initial data or coefficients. The proposed method outperforms all similar DE methods using triplets in terms of computational cost, visual quality and bitrate.
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