The Optimal n - out - of - n Visual Secret Sharing Scheme for Gray - Scale Images ∗
نویسنده
چکیده
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 socalled polynomial representation of basis matrices treated in [15], [16]. Furthermore, it is proved that such construction can attain the optimal (n, n)-VSS-GS scheme. key words: visual secret sharing scheme, gray-scale image, poly-
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