摘要
针对视觉密码扩展度大的问题,提出了一种基于随机网格的(2,2)视觉密码方案,所给方案不同于已有的基于随机网格的视觉密码方案,其所产生的分享图像为有意义的图像,所产生的分享图像与原始秘密图像具有相同的大小。方案根据区域中白色像素所占比例的不同来区分1幅图像的白色和黑色区域。用给定的白色和黑色区域中白的像素所占比例和第1幅掩盖图像生成第1幅分享图像,然后据此分享图像、秘密图像和另外1幅掩盖图像生成另外1张分享图像。通过实验对所给的密码方案进行验证,实验结果证实了所给方案的有效性,所恢复的秘密图像更清晰。
To solve the problem of large visual cryptography expansion,a scheme of(2,2)visual cryptography based on random grid is proposed.The proposed scheme is different from the existing visual cryptographic schemes based on random grid.The shared images produced by the scheme are meaningful,and they have the same size as that of the original secret image.The scheme distinguishes the white and black areas of an image according to the proportion of white pixels in the area.The first shared image is generated by the given proportion of white pixel in the white and black areas and the first cover image.Then,another shared image is produced according to pixel color of the first shared image,secret image and another cover image.The cryptography scheme is verified by experiments.Experimental results verify the effectiveness of the proposed scheme,and it is indicated that the secret image restored by the scheme is clearer than other schemes.
作者
王洪君
马妍
曹宇
赵久影
林颢
WANG Hongjun;MA Yan;CAO Yu;ZHAO Jiuying;LIN Hao(College of Computer,Jilin Normal University,Siping 136000,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2020年第8期746-752,共7页
Engineering Journal of Wuhan University
基金
国家自然科学基金资助项目(编号:31070224)
吉林省教育厅“十二五”科学技术研究项目(编号:吉教科合字[2011]第162号)。
关键词
视觉密码
随机网格
分享图像
秘密图像
visual cryptography
random grid
shared image
secret image
