CAJ | 학술논문

可视秘密共享的一个主要不足是重构后图像的对比度损失严重.提出了利用反转实现理想对比度的密图分存方案.编码轮数为m/h(上取整)(m和h分别是白像素加密所用基阵全部列和全白列的数量),采取像素块编码方式,每步都将m个连续相同的像素进行一次性加密编码,不产生像素扩展.对方案的正确性和安全性进行了证明,并与类似方案进行了对比分析和实验.该方案编码效率较高,系统容量较小.
가시비밀공향적일개주요불족시중구후도상적대비도손실엄중.제출료이용반전실현이상대비도적밀도분존방안.편마륜수위m/h(상취정)(m화h분별시백상소가밀소용기진전부렬화전백렬적수량),채취상소괴편마방식,매보도장m개련속상동적상소진행일차성가밀편마,불산생상소확전.대방안적정학성화안전성진행료증명,병여유사방안진행료대비분석화실험.해방안편마효솔교고,계통용량교소.
In visual secret sharing (VSS) schemes, the contrast of reconstructed image is much lost. A novel VSS scheme with reversing is presented.lt can achieve really ideal contrast within (the celling integer of) m/h encoding runs, where m and h are respectively the number of all columns and the number of whole-white columns in the basis matrix for white pixels encoding. It encodes a secret image block by block and no pixel expansion occurs.A block consists of consecutive m pixels with same type, which means that m pixels together join into each encoding step. The proof of its correctness and security, the experimental results, analyses and comparisons are also shown. High encoding efficiency and low system capacity are its main advantages.