| 一种基于混沌理论的数字图像置乱新算法 |
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| 引用本文： | 何冰.一种基于混沌理论的数字图像置乱新算法[J].渭南师范学院学报,2014(7):16-19. |
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| 作者姓名： | 何冰 |
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| 作者单位： | 渭南师范学院物理与电气工程学院,陕西渭南714099 |
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| 基金项目： | 陕西省军民融合研究基金项目：水印技术在中小企业版权保护中的应用（13JMR16） |
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| 摘 要： | 提出一种基于混沌理论的数字图像置乱新算法．首先将混沌序列按照从小到大的顺序进行排列，然后对排序后的每个元素对应的编号以集合序列的形式记录下来，形成密钥流．最后按密钥流形成的索引值对相应位置上的像素进行位置置乱．并将位置置乱后的两相邻的像素值进行异或运算得到最后的加密图像．实验结果表明：该算法具有良好的置乱效果，使置乱后的图像相邻像素的相关性更小，提高了抗非法攻击的能力，增加了图像的安全性．
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| 关 键 词： | 混沌理论 混沌序列 安全性 |
A New Digital Image Scrambling Algorithm Basic on Chaos Theory |
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| HE Bing.A New Digital Image Scrambling Algorithm Basic on Chaos Theory[J].Journal of Weinan Teachers College,2014(7):16-19. |
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| Authors: | HE Bing |
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| Institution: | HE Bing (School of Physics and Electronic Engineering, Weinan Normal University, Weinan 714099, China) |
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| Abstract: | By using the Logistic mapping sequence of non-periodic, random, non-repetitive, not convergence but bounded these special properties, an improved digital image scrambling encryption algorithm based on chaos theory is proposed. Firstly the order of Logistic chaotic sequence is ranked from small to large, then the code that corresponds to each element is recorded by group sequence, which called key stream. Finally the corresponding pixel position is scrambled by index value which is formed by key stream. Meanwhile, the encrypted image is formed by XOR operation of two pixel values. The simulation results show that the pro- posed method has good scrambling effect, which makes the correlation of neighboring pixels of encrypted image become smaller, en- hances the ability of the anti-illegal attacks and improves the security of the image. |
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| Keywords: | chaos theory chaotic sequence image security |
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