An Optimization Model for Visual Cryptography Schemes with Unexpanded Shares.

Ching-Sheng Hsu Shu-Fen Tu Young-Chang Hou An Optimization Model for Visual Cryptography Schemes with Unexpanded Shares. 58-67 2006 conf/ismis/2006 ISMIS http://dx.doi.org/10.1007/11875604_8 db/conf/ismis/ismis2006.html#HsuTH06