The optimal n-out-of-n visual secret sharing shceme for gray-scale images
Mitsugu Iwamoto and Hirosuke Yamamoto
- In this paper, a method is proposed to construct an n-out-of-n visual secret sharing scheme for gray-scale images, for short an (n,n)-VSS-GS scheme, which is optimal in the sense of contrast and pixel expansion, i.e., resolution. It is shown that any (n,n)-VSS-GS scheme can be constructed based on the so-called polynominal representation of basis matrices. Furthermore, it is proved that such construction can attain the optimal (n,n)-VSS=GS scheme.
- Index Terms: visual secret sharing scheme, gray-scale image, polynominalrepresentation, contrast, pixel expansion
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