Robust Visual Secret Sharing Scheme Applying to QR Code

Algorithm 2

Secret image recovery of the proposed scheme.

Input:   shares ; threshold parameters ;

Output: the reconstructed secret QR code image .

  for   to   do

Read the secondary plane of share to create binary QR image as

   end for

Read the version as v and level of error correction noted as l of image with QR code decoder.

Based on v and l, we can get the total number of the codewords in as according to the standard [16]. For each codeword in

note as .

  for   to   do

 , is the result of XORing operation.

  end for

Create the bits in other regions based on the version and level of error correction, after that put them and the bits of codeword

together into a new image to reconstruct a QR code image .

Output the image .