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电子学报  2012 

基于边缘匹配和模函数的安全密写算法

DOI: 10.3969/j.issn.0372-2112.2012.10.017, PP. 2002-2008

Keywords: 信息隐藏,边缘匹配,像素差值,模函数

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Abstract:

为了提供较大的可调信息嵌入量和保持载密图像良好的视觉质量,提出一种新的密写算法.根据人类视觉特性,利用像素的3个相邻像素的最大像素值与最小像素值的差值,将图像分为平滑区、过渡区和边缘区;根据模数循环的特点,应用具有安全特性的模函数以某一嵌入方案在3个区域中的像素自适应地嵌入不同的信息比特数.选择不同的嵌入方案可以得到不同的嵌入量和载密图像视觉质量.实验结果表明,本文算法在保持高嵌入率的同时仍保持较好的载密图像视觉质量,且安全性好.

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