吉林大学学报（信息科学版）2013，Vol.31Issue(3)：297-301,5.
具有伪装图像像素不扩展的(2,2)视觉密码方案
Image Size Invariant (2,2) Visual Cryptography Scheme with Disguised Patterns
摘要
Abstract
To solve the problems of pixel expansion and meaningless of shadow images,a new (2,2) visual cryptography scheme is proposed,in which the shadow images with a certain significance are the same size as the original secret image.In this method,to share a pixel,one of the columns in the basis matrices is chosen at random.Each element in the chosen column is distributed to corresponding shadow images.This method is to use the frequency of white pixels in the black and white areas of the recovered image for interpreting black and white pixels by human visual system.The frequency of white pixels in the white area of recovered image will be higher than that in the black area.The recovered image has good visual effectiveness and security.Experimental results confirm the effectiveness of the scheme.关键词
视觉密码/基本矩阵/分享图像/秘密图像Key words
visual cryptography/ basic matrix/ shadow image/ secret image分类
信息技术与安全科学引用本文复制引用
王洪君,鲁晓颖,牟晓丽,杨轶..具有伪装图像像素不扩展的(2,2)视觉密码方案[J].吉林大学学报（信息科学版）,2013,31(3):297-301,5.基金项目
国家自然科学基金资助项目(31070224) （31070224）
吉林省教育厅"十二五"科学技术研究项目(吉教科合字[2011]第162号) （吉教科合字[2011]第162号）
