| 基于对角折叠位运算的图像置乱方法 |
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| 引用本文： | 李梦晓,谭永杰,田爱奎.基于对角折叠位运算的图像置乱方法[J].山东理工大学学报,2009,23(2):63-66. |
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| 作者姓名： | 李梦晓 谭永杰 田爱奎 |
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| 作者单位： | [1]山东理工大学计算机科学与技术学院,山东淄博255049 [2]陕西师范大学计算机科学学院,陕西西安710062 |
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| 摘 要： | 为提高数字图像在传输中的安全性,将空间位置信息和空域灰度信息相结合,提出了一种数字图像置乱算法,该方法首先将图像矩阵偶数行、列元素互换,并逆序排列偶数行元素,从位置上初步置乱图像;然后将图像矩阵沿两条主对角线折叠对应像素异或后,对得到图像分块,对每一子块进行相同的对角折叠位异或操作,进而对图像进行灰度空间的置乱;最后再将图像矩阵奇数行、列元素互换后,奇数行元素逆序排列,加大置乱程度.初步实验结果表明,该方法置乱效果明显优于Arnold法、Hilbert法、基于最高有效位及混沌系统的置乱方法.
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| 关 键 词： | 图像置乱 对角折叠 位运算 置乱度 信噪比 |
An image scrambling method based on bit operation of diagonally folded pixels |
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| LI Meng-Xiao,TAN Yong-Jie,TIAN Ai-Kui.An image scrambling method based on bit operation of diagonally folded pixels[J].Journal of Shandong University of Technology:Science and Technology,2009,23(2):63-66. |
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| Authors: | LI Meng-Xiao TAN Yong-Jie TIAN Ai-Kui |
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| Institution: | 1.College of Computer Science and Technology;Shandong University of Technology;zi'bo 255049;China;2.College of Computer Science;Shanxi Normal University;Xi'an 710062;China |
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| Abstract: | In order to improve the security of image transmission,this paper presents a new image scrambling method combining the position and grey-scale information.In this method,after even-row pixels and even-column pixels are exchanged,every sequence of pixels in each even row are reversed,which disorders the spatial position of the image.Then the image is folded along the two leading diagonals and corresponding pixels are processed by a bitwise exclusive OR operator.Next,the image is divided into several blocks a... |
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