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Simple reversible watermarking schemes

This paper proposes a low computational reversible watermarking approach. An integer transform is defined for pairs of pixels. The transform is invertible and, besides, for some pairs of pixels, the original values are recovered even if the LSBs of the transformed pixels are overwritten. This allows watermarking embedding into image LSB plane without any other data compression scheme. At detection, original image is exactly recovered. The method is of interest for image authentication and data hiding. Experimental results are provided.