PROJECT TITLE :
Multi-round dynamic swap optimisation for table-based steganography
The reference-table-primarily based (RTB) steganography employs 2 pixels to conceal a secret digit, in keeping with a predetermined reference table. Most of the RTB steganographic schemes mentioned in the literature do not consider the non-uniformity of the key digits and therefore the locating numbers indicated by the pixel pairs. In contrast, the non-uniformity of the locating numbers exists for many of host images. When a non-uniform secret sequence is embedded, the quality control of the stego image is quite challengeable compared with an identical secret sequence. To the best of the authors information, most of the present algorithms concentrate on the uniform sequences. In this study, they propose a multi-round dynamic swap optimisation (MRDSO) algorithm for RTB steganography, that is a lot of appropriate for non-uniform secret sequences. By optimising the permutation of the reference table, the proposed algorithm will increase the eventualities that the locating range indicated by the pixel try is equal to the secret digit, which means that that these host pixels will carry the key digit without any distortion. The experimental results show that the proposed MRDSO algorithm will increase the standard of the stego image by 0.1-1.seven dB.
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