Structure Aware Visual Cryptography
Structure Aware Visual Cryptography
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DOI：
10.1111/cgf.12482
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发表时间：
2014-10
影响因子：
2.5
通讯作者：
Bin Liu-;Ralph Robert Martin;Jianjun Huang;Shimin Hu
中科院分区：
文献类型：
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作者：
Bin Liu-;Ralph Robert Martin;Jianjun Huang;Shimin Hu
视觉密码术是一种加密技术，它通过将秘密图像分布在由看似随机的黑白像素组成的一些共享图像之间来隐藏秘密图像。扩展视觉密码术(EVC)更进一步，共享图像代表有意义的二进制图像。最初的EVC方法存在对比度低的问题，因此后来的论文考虑了如何通过增强共享图像的对比度来提高结果的视觉质量。这项工作通过使用抖动框架和细节恢复操作来保留共享图像中的边缘结构，从而进一步改善了共享图像的外观。我们还小心翼翼地抑制平滑区域的噪音。
Visual cryptography is an encryption technique that hides a secret image by distributing it between some shared images made up of seemingly random black‐and‐white pixels. Extended visual cryptography (EVC) goes further in that the shared images instead represent meaningful binary pictures. The original approach to EVC suffered from low contrast, so later papers considered how to improve the visual quality of the results by enhancing contrast of the shared images. This work further improves the appearance of the shared images by preserving edge structures within them using a framework of dithering followed by a detail recovery operation. We are also careful to suppress noise in smooth areas.