摘要
为了优化区域递增式视觉密码的性能参数,提出一种基于异或运算的区域递增式视觉密码方案.首先设计自适应区域分配算法,然后构造单秘密分享视觉密码的加密矩阵,最后设计秘密图像的分享与恢复流程,并给出一种实现方案.实验结果表明,该方案适用于通用存取结构,能提供更加丰富的应用场景,且像素不扩展,可有效地减少共享份的存储和传输开销;同时,恢复图像不存在颜色反转失真,白像素可以实现完全恢复,提高了相对差,能够显著地改善秘密图像的视觉效果.
In order to optimize the performance parameters of region incrementing visual cryptography. A novel XOR-based region incrementing visual cryptography scheme is proposed. At first, an adaptive region assignment algorithm is designed. Then, the encode matrices of single secret sharing visual cryptography are constructed. Furthermore, the procedures of secret image sharing and recovering are designed. Finally, a scheme is realized. Experimental results show that the proposed scheme is suitable for general access structure, and further enriches the application scenarios. Moreover, it has no pixel expansion, and the storage and transmission cost of shares can be decreased efficiently. Meanwhile, the reverse color distortion problem is solved, the white pixels of secret im-age can be recovered perfectly and the relative difference is also enhanced. Therefore, the visual performance of secret image can be improved effectively.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
2015年第11期2116-2125,共10页
Journal of Computer-Aided Design & Computer Graphics
基金
国家自然科学基金(61070086)
信息保障技术重点实验室开放基金(KJ-13-107)
关键词
视觉密码
区域递增式
异或运算
像素不扩展
完全恢复
visual cryptography
region increment
XOR operation
no pixel expansion
perfect recovery
