| 一种基于Arnold变换的图像Hash算法 |
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| 引用本文： | 胡春强,邓绍江,张宇,王方晓,黄桂林.一种基于Arnold变换的图像Hash算法[J].世界科技研究与发展,2010,32(2):138-140. |
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| 作者姓名： | 胡春强 邓绍江 张宇 王方晓 黄桂林 |
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| 作者单位： | 1. 重庆大学计算机学院,重庆,400044
2. 康普科纬迅软件服务(上海)有限公司,上海,200040 |
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| 基金项目： | 国家自然科学基金，重庆市自然科学基金，重庆大学"输配电装备及系统安全与新技术"国家重点实验室自主课题 |
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| 摘 要： | 提出一种基于Arnold变换的图像hash算法。算法首先将原始图像经过Arnold置乱变换得到加密图像，然后将原始图像与加密图像的差值矩阵由若干混沌序列生成的伪随机矩阵进行调制，最后将调制后的结果矩阵进行量化判决以产生固定长度的图像Hash序列。仿真结果表明，该算法对JPEG压缩、低通滤波、图像缩放等操作有一定的鲁棒性。
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| 关 键 词： | 图像Hash Arnold变换 混沌系统 鲁棒性 |
Image Hashing Algorithm Based on Arnold Transformation |
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| HU Chunqiang,DENG Shaojiang,ZHANG Yu,WANG Fangxiao,HUANG Guilin.Image Hashing Algorithm Based on Arnold Transformation[J].World Sci-tech R & D,2010,32(2):138-140. |
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| Authors: | HU Chunqiang DENG Shaojiang ZHANG Yu WANG Fangxiao HUANG Guilin |
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| Institution: | 1. The college of Computer Science of Chongqing University, Chongqing 400044 ; 2. Compuware Covisint (Shanghai) Software Service Co. Ltd, Shanghai 200040) |
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| Abstract: | Image hashing algorithm based on Arnold transformation was proposed. To begin with ,the original image was encrypted by Arnold transformation. After that,difference matrix between original image and encrypted image was modulated by N matrices that are pseudo ran-domly generated with Chaos sequence. At last, by quantization ,an N-bit image hash is obtained. Experimental results show that the proposed scheme is robust against JPEG compression,low-pass filtering and scaling attacks. |
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| Keywords: | image hash Arnold transformation chaos system robust |
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