Generalized Random Grid and Its Applications in Visual Cryptography

@article{Wu2013GeneralizedRG,
  title={Generalized Random Grid and Its Applications in Visual Cryptography},
  author={Xiaotian Wu and Wei Sun},
  journal={IEEE Transactions on Information Forensics and Security},
  year={2013},
  volume={8},
  pages={1541-1553}
}
Random grid (RG) is a method to implement visual cryptography (VC) without pixel expansion. However, a reconstructed secret with lower visual quality reveals in RG-based VC due to the fact that average light transmission of a share is fixed at 1/2. In this work, we introduce the concept of generalized RG, where the light transmission of a share becomes adjustable, and adopt generalized RG to implement different VC schemes. First, a basic algorithm, a (2,2) generalized RG-based VC, is devised… CONTINUE READING
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