| 外形比例不失真的可视门限方案的研究 |
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| 引用本文： | 郁滨,房礼国.外形比例不失真的可视门限方案的研究[J].计算机工程与设计,2006,27(11):1998-1999,2014. |
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| 作者姓名： | 郁滨 房礼国 |
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| 作者单位： | 解放军信息工程大学,电子技术学院,河南,郑州,450004 |
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| 摘 要： | 运用视觉密码方案对正方形图片加密,如果方案的像素扩展度m不是一个整数的平方,加密后图片会从正方形变为矩形,从而导致信息的丢失.本文在理论上证明了两种改进的外形比例不失真方案的关系,针对改进方案不能对某些图片边缘部分加密的问题,给出了先扩充图片再加密的方案,仿真实验表明,本方案是有效的.
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| 关 键 词： | 视觉密码 视觉密码方案 外形比例 不失真 像素扩展度 |
| 文章编号： | 1000-7024（2006）11-1998-02 |
| 收稿时间： | 2005-06-20 |
| 修稿时间： | 2005-06-20 |
Research on aspect ratio invariant visual threshold schemes |
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| YU Bin,FANG Li-guo.Research on aspect ratio invariant visual threshold schemes[J].Computer Engineering and Design,2006,27(11):1998-1999,2014. |
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| Authors: | YU Bin FANG Li-guo |
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| Abstract: | If the pixel expansion m is not a square value, the secret image - a foursquare will be changed to a rectangle and consequently lead to the loss of information after performing the VCS technique. The relationship between two improved schemes, which solved the problem of aspect ratio variant is proved. At the same time a scheme of encrypting after increasing the secret image is provided to encrypt the edge of the image. Simulation results demonstrate that this scheme is effective. |
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| Keywords: | visual cryptography visual cryptography scheme aspect ratio invariant pixel expansion |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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