LI Shundong, LI Jiliang, WANG Daoshun, “Region Incrementing Visual Cryptography Scheme with Same Contrast,” Chinese Journal of Electronics, vol. 25, no. 4, pp. 621-624, 2016, doi: 10.1049/cje.2016.06.002
Citation: LI Shundong, LI Jiliang, WANG Daoshun, “Region Incrementing Visual Cryptography Scheme with Same Contrast,” Chinese Journal of Electronics, vol. 25, no. 4, pp. 621-624, 2016, doi: 10.1049/cje.2016.06.002

Region Incrementing Visual Cryptography Scheme with Same Contrast

doi: 10.1049/cje.2016.06.002
Funds:  This work is supported by the National Natural Science Foundation of China (No.61070189, No.61272435, No.61170032, No.61373020).
  • Received Date: 2014-06-03
  • Rev Recd Date: 2014-08-31
  • Publish Date: 2016-07-10
  • In binary Region incrementing visual cryptography schemes (RIVCSs), the secrets of multiple secrecy regions can be gradually revealed by human visual system. A characteristic of the existing binary RIVCSs different from traditional binary Visual cryptography schemes (VCSs) is that, the contrasts for different revealed regions are different while traditional binary VCSs have same contrast. To keep the quality (contrast) of recovered image compatible with the traditional VCS, we use integer linear programming to design a binary (k,n)-RIVCS with same contrast for all secrecy regions in this paper. Experimental results demonstrate that our method is feasible and effective. The trade-off is that our scheme involves a larger pixel expansion.
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