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Abstract: Reversible contrast mapping RCM is a simple integer transform that appliesto pairs of pixels. For some pairs of pixels, RCM is invertible, even if theleast significant bits LSBs of the transformed pixels are lost. The dataspace occupied by the LSBs is suitable for data hiding. The embeddedinformation bit-rates of the proposed spatial domain reversible watermarkingscheme are close to the highest bit-rates reported so far. The scheme does notneed additional data compression, and, in terms of mathematical complexity, itappears to be the lowest complexity one proposed up to now. A very fast lookuptable implementation is proposed. Robustness against cropping can be ensured aswell.



Autor: Dinu Coltuc, Jean-Marc Chassery GIPSA-lab

Fuente: https://arxiv.org/







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