首页> 外文期刊>Journal of Imaging Science and Technology >Secret Image Sharing: Dpvcs A Two-in-one Combinationof (d)eterministic And (p)robabilistic (v)isual (c)ryptography (s)chemes
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Secret Image Sharing: Dpvcs A Two-in-one Combinationof (d)eterministic And (p)robabilistic (v)isual (c)ryptography (s)chemes

机译:秘密图像共享:Dpvcs(d)确定性和(p)熟练(v)常规(c)密码术(s)化学的二合一组合

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摘要

Visual cryptography scheme (VCS) is a secure method that encrypts a secret image by breaking it into shadow images. Due to the nature of encryption there are two types of VCS: one is the deterministic VCS (DVCS), and the other is the probabilistic VCS (PVCS). For the DVCS, we use m (known as the pixel expansion) subpixels to represent a secret pixel. The PVCS uses only one subpixel to represent a secret pixel, while the quality of reconstructed image is degraded. It is evident that one can combine both VCSs simultaneously over shadow images to develop their specialities: the DVCS retains the resolution and the PVCS considerably reduces the shadow size. This article has two main contributions: (1) the authors prove that this two-in-one VCS still satisfies the contrast and security conditions of VCS; (2) the authors show how to arrange subpixels with two different pixel expansions to retain the visual quality of reconstructed image.
机译:视觉加密方案(VCS)是一种安全的方法,可以通过将秘密图像分解为阴影图像来对其进行加密。由于加密的性质,有两种类型的VCS:一种是确定性VCS(DVCS),另一种是概率VCS(PVCS)。对于DVCS,我们使用m个子像素(称为像素扩展)表示秘密像素。 PVCS仅使用一个子像素代表一个秘密像素,而重建图像的质量却下降了。显然,可以同时将两个VCS组合在阴影图像上以开发其特殊性:DVCS保持分辨率,而PVCS大大减小了阴影大小。本文有两个主要贡献:(1)作者证明该二合一VCS仍然满足VCS的对比度和安全性条件; (2)作者展示了如何排列具有两个不同像素扩展的子像素,以保持重建图像的视觉质量。

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