A Novel Visual Cryptography Scheme Shared with Edge Information Embedded QR Code

Fei Hu, Yuanzhi Yao, Weihai Li, Nenghai Yu

Abstract: QR code has been widely used in our daily life due to its convenience, and the security of QR code becomes a rising problem. In this paper, we introduce a new algorithm that adds the edge of the gray image to the QR code, and the edge information is captured by the Canny detector. And then we use the random grid based visual cryptography scheme (RG-VCS) to generate shares. Each share of the VCS is an individual QR code that can be scanned by a QR code reader, and the secret information can be decoded by purely stacking without computation. Meanwhile, we can also recover the secret image with better visual quality with the help of computation.