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An Improved Size Invariant (n, n) Extended Visual Cryptography Scheme

机译:改进的尺寸不变式(n,n)扩展视觉密码方案

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摘要

In this paper, the authors have presented a (n, n) extended visual cryptography scheme where n numbers of meaningful shares furnish a visually secret message. Initially they have converted a grayscale image into binary image using dithering method. Afterwards, they have incorporated pixel's eight neighboring connectivity property of secret image during formation of meaningful shares. The scheme is able to generate the shares without extending its size. This approach has enhanced the visual quality of the recovered secret image from n numbers of shares. The scheme has been tested with some images and satisfactory results are achieved. The scheme has improved the contrast of the recovered secret image than a related (n, n) extended visual cryptography scheme.
机译:在本文中,作者提出了(n,n)个扩展的视觉密码方案,其中n个有意义的份额提供了视觉秘密信息。最初,他们使用抖动方法将灰度图像转换为二进制图像。之后,他们在形成有意义的份额时合并了秘密图像的像素的八个相邻连接属性。该方案能够在不扩大其规模的情况下产生份额。此方法从n个共享中增强了恢复的秘密图像的视觉质量。该方案已经过一些图像测试,取得了满意的结果。与相关的(n,n)扩展视觉密码方案相比,该方案提高了恢复的秘密图像的对比度。

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