面向密文图像信息隐藏的随机插值方法

doi:10.3969/j.issn.0255-8297.2020.03.008

摘要/Abstract

摘要： 传统图像插值方法应用于密文域图像信息隐藏时会降低信息隐藏系统的安全性.为此利用随机分配插值权重的策略设计了一种密文图像随机插值方法.该方法首先生成大小为密文图像两倍的初始插值图像，对于插值图像的奇数行和奇数列像素，直接用密文图像的相应像素填充；对于其他位置的像素，先用伪随机函数生成随机值，再结合像素的具体位置来计算插值结果.实验结果表明，所提方法生成的密文图像的插值图像，其直方图近似均匀分布.对比结果显示该随机插值方法在安全性方面优于3种文献插值方法.

关键词: 随机插值, 信息隐藏, 密文图像, 可逆信息隐藏, 直方图

Abstract: When traditional data interpolation methods are applied to data hiding in encrypted images, they will reduce security of the data hiding system. To address this problem, we exploit random weight strategy to design a random interpolation method for encrypted images. The proposed method firstly generates the initial interpolated image, which is twice the size of the encrypted image. For the pixels in the odd rows and the odd columns of the interpolated image, the proposed method fills them with the corresponding pixels of the encrypted image. For the rest pixels of the interpolated image, the proposed method generates random values by pseudo-random function and calculates the interpolated results in terms of their detailed locations. Experimental results show that the histograms of interpolated encrypted images calculated by our random interpolation are approximately uniformly distributed. Comparison results demonstrate that our random interpolation outperforms three popular existing interpolation methods.

Key words: random interpolation, data hiding, encrypted image, reversible information hiding, histogram

中图分类号:

TP391

孙容海, 施林甫, 俞春强, 劳欢, 唐振军. 面向密文图像信息隐藏的随机插值方法[J]. 应用科学学报, 2020, 38(3): 419-430.

SUN Ronghai, SHI Linfu, YU Chunqiang, LAO Huan, TANG Zhenjun. Random Interpolation Method for Data Hiding in Encrypted Images[J]. Journal of Applied Sciences, 2020, 38(3): 419-430.

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面向密文图像信息隐藏的随机插值方法

Random Interpolation Method for Data Hiding in Encrypted Images

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