Multiple Reversible Data Hiding With Module Shape Adjustments of Quick Response Codes

Reversible data hiding is famous for the reversibility and ease of implementation. We apply two major categories of reversible data hiding to hide three sets of information into original image. We consider using the random sequences, along with the quick response (QR) codes that can be captured by camera phones, to serve as the first set of information. The QR codes can be expected to help increase the protection capability of hiding the second set of information. Side information relating to the second and third set of information can be hidden into the QR code with module shape adjustment and the histogram alteration method, respectively, to keep the reversibility.