| 摘要: |
| 针对门限结构下恢复多幅秘密图像存在信息损失的问题,给出了一个完全恢复的门限多秘密视觉密码定义,能够适应门限值与秘密数量之间的各种对应关系.在此基础上,通过构造具有上下门限值的单门限多秘密视觉密码方案,并设计旋转规则融合算法和区域合并算法,提出了一种多门限方案.最后,对方案的有效性进行了理论证明和实验验证. |
| 关键词: 视觉密码 多秘密 单门限 多门限 信息损失 完全恢复 |
| DOI：10.13328/j.cnki.jos.004611 |
| 分类号: |
| 基金项目: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) |
|
| Threshold Multi-Secret Visual Cryptography Scheme with Perfect Recovery |
|
FU Zheng-Xin1, SHEN Gang1, LI Bin2, YU Bin1
|
|
1.Information Engineering University, Zhengzhou 450001, China;2.Science and Technology on Information Assurance Laboratory, Beijing 100072, China
|
| Abstract: |
| To address the issue of information loss in recovering multiple secret images for threshold structure, this paper develops a definition of threshold multi-secret visual cryptography with perfect recovery, which can adapt to various corresponding relationship between the threshold value and the secret number. Based on the given definition, a single-threshold multi-secret visual cryptography scheme with upper and lower thresholds is constructed, and a multiple-threshold scheme is then proposed by designing the rotation rule fusion algorithm and the region merging algorithm. Furthermore, the effectiveness is proved theoretically and verified by experiments. |
| Key words: visual cryptography multi-secret single-threshold multiple-threshold information loss perfect recovery |
