具有理想对比度的可视密码方案
韩妍妍,何文才,胡予濮
Perfect contrast visual cryptography scheme
Yan-yan HAN,Wen-cai HE,Yu-pu HU
通信学报 . 2009, (9): 54 -59 .  DOI: 1000-436X(2009)09-0054-06