作　　者： ; ;

机构地区： 四川大学数学学院

出　　处： 《计算机学报》 2000年第9期943-948,共6页

摘　　要： 提出一种新的可视图像隐藏方案 ,仅使用一幅加密图便能可视恢复密图 .即用加密图自身来解密 ,其密钥为密图自身按一定的方式错位 .在该方案中 ,密图本身既是编码又是解码 .可视密图的恢复方法十分简便 ,既不需加密知识又不用密码计算 .介绍了一幅密图的单幅可视隐藏方法 ,可视变换矩阵的定义和一般构造模式 ,并证明由它恢复原图的正确性、唯一性和在一定条件下的有效性 ;同时给出实现单幅图像可视隐藏阈值方案 .单幅图像可视隐藏与一幅密图的共享可视分存相比具有极好的抗压缩性和抗几何变形性 ,其隐藏方案具有随机性、多样性和一定的欺骗性 (与共享密存相比 ) . A new scheme is introduced to encode a secret image into single shadow image called visual hiding in the paper, where decode uses the shadow image stack itself and shows the original image in certain orientation. The shadow image acts both encoder and decoder function, which can visually recover the original image without any knowledge of cryptography and without performing of any cryptographic computation. The definition of visual hiding image, general construction and threshold scheme are to given in this paper. The correctness and uniqueness of recovering the original image using visual matrix is to be approved in this paper. The visual hiding has the property of anti compression and anti distortion, while visual cryptography has not. The scheme of visual hiding has various models and random characteristics, while visual cryptography has not.

关 键 词： 可视隐藏 阈值方案 几何变形 图像编码

领　　域： [电子电信] [电子电信] [自动化与计算机技术] [自动化与计算机技术]