Shenchuan Liu, Masaaki Fujiyoshi, Hitoshi Kiya. A cheat preventing method with efficient pixel expansion for Naor-Shamir's visual cryptography. In 2014 IEEE International Conference on Image Processing, ICIP 2014, Paris, France, October 27-30, 2014. pages 5527-5531, IEEE, 2014. [doi]
Abstract is missing.