一种新的基于Bayer矩阵抖动的灰度图象图视密码学的方法

提出利用图像处理的抖动方法来对完全256级灰度图象的图视密码学处理的新方法,引入计算机图象处理的抖动技术,在二值图象的图视密码学的方案的基础上,提出了基于Bayer矩阵抖动方法的灰度图象图视密码学方案,优点是计算量小,可直接使用二值图象基本矩阵,像素扩展小,实验效果较好。

A New Bayer Matrix-based Scheme of Visual Cryptography for Grey Level Images

A visual cryptography scheme for a set P of n participants is a method to encode a secret image into n shadow images called shares, where each participant in set P receives one share. The advantage is that the participants in a qualified set will be able to see the secret image without any knowledge of cryptography and without performing any cryptographic computation. The decoding operation is simple, safe and secure. Its efficacious for secret sharing, whereas visual cryptography scheme for Grey Level Images has its shortcomings: the pixel expansion makes the size of the share transparencies very big. In this paper a new Bayer matrix based scheme of Visual cryptography for grey level images is applied.