Real Perfect Contrast Visual Secret Sharing Schemes with Reversing
Real Perfect Contrast Visual Secret Sharing Schemes with Reversing
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DOI：
10.1007/11767480_30
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发表时间：
2006-06
期刊：
影响因子：
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通讯作者：
Ching-Nung Yang;Chung-Chun Wang;Tse-Shih Chen
中科院分区：
文献类型：
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作者：
Ching-Nung Yang;Chung-Chun Wang;Tse-Shih Chen
视觉秘密共享方案是一种秘密图像共享方案。一个秘密的图像是从重叠的阴影图像，而无需额外的计算视觉揭示。然而，重建图像的对比度损失很大。Viet和Kurosawa利用传统的VSS方案，通过反转操作（反转黑和白色），设计了一种几乎完全重构秘密图像的VSS方案。Viet-Kurosawa方案的两个缺点是：（1）只能重建几乎理想对比度的图像，而不能重建理想对比度的图像;（2）所使用的传统VSS方案必须是完美的黑色方案。本文提出了一种真实的完全对比度的VSS方案，使得无论传统的VSS方案是哪种类型（完全黑或非完全黑），黑色和白色像素都能在有限的游程内完全重建。
The visual secret sharing (VSS for short) scheme is a secret image sharing scheme. A secret image is visually revealed from overlapping shadow images without additional computations. However, the contrast of reconstructed image is much lost. By means of the reversing operation (reverse black and white), Viet and Kurosawa used the traditional VSS scheme to design a VSS scheme which the secret image is almost perfectly reconstructed. Two drawbacks of the Viet-Kurosawa scheme are: (1) one can only reconstruct an almost ideal-contrast image but not an ideal-contrast image (2) the used traditional VSS scheme must be a perfect black scheme. This paper shows a real perfect contrast VSS scheme such that black and white pixels are all perfectly reconstructed within finite runs, no matter what type (perfect black or non-perfect black) of the traditional VSS scheme is.