Sharing more information in gray visual cryptography scheme
Introduce general gray visual cryptography scheme. GVCS can share more information besides a binary secret image. All existing TiOISSSs and the traditional VCS can be seen as specific cases of our scheme. Our scheme can get smaller shadow size with acceptable visual quality compared with existing TiOISSSs.
visual cryptography image secret sharing polynomial-based secret sharing gray mixing model secret sharing lagranges interpolation information hiding image processing