Research Article
Robust Visual Secret Sharing Scheme Applying to QR Code
Algorithm 1
Proposed robust VSS applying to QR codes.
Input: A binary secret QR code image ; different binary temporary QR code images ; different binary QR | code cover images ; the threshold parameters ; the error correction characteristics | Output: grayscale shares | Generate grayscale shares by graying binary QR code images . | Averagely and randomly divide the serial of total codewords into subsets denoted as , and the number of | each set is , where . | Serial v of the codeword in the secret image S is denoted as , and the serial v of the codeword in the is denoted as . | for to do | for each codeword v in do | if then | Modify the codeword of binary QR code image as ; | end if | (9) end for | (10) end for | for to do | Replace the second significant bit plane of grayscale QR code image with the modified QR code image , and | replace the last six significant bit planes with random binary numbers to generate grayscale share . | end for | Output grayscale shares . |
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