摘要
为了应对日益增大的图像安全问题,提出一种结合二维Logistic映射与二维离散余弦变换(2D-DCT)的数字图像隐藏算法.首先,利用二维Logistic映射产生的混沌序列对秘密图像进行像素扩散与置乱,从而达到对秘密图像的加密效果.接着,分块对载体图像进行二维离散余弦变换,然后把扩散与置乱后的图像信息分存在变换后每块的右下角.最后再进行二维离散余弦反变换(2D-IDCT),并得到隐密图像.实验结果也表明,该算法安全可行且隐藏效果良好.
To cope with increasingly serious problems related to image security,this study proposes a digital image hiding algorithm based on two-dimensional(2D)Logistic mapping and 2D discrete cosine transform(2D-DCT).Firstly,the chaotic sequence generated by the 2D Logistic mapping is used to diffuse and scramble pixels of the secret image so that the secret image can be encrypted.Then,2D-DCT is performed on the host image in blocks,and the image information after diffusion and scrambling is stored in the lower right corner of each block after 2D-DCT.Finally,2D inverse discrete cosine transform(2D-IDCT)is carried out to yield the stego image.Experimental results also show that the proposed algorithm is safe,feasible,and effective in image hiding.
作者
程东升
隆广庆
朱小玲
CHENG Dong-Sheng;LONG Guang-Qing;ZHU Xiao-Ling(School of Software Engineering,Shenzhen Institute of Information Technology,Shenzhen 518172,China;Department of Mathematics and Statistics,Nanning Normal University,Nanning 530299,China)
出处
《计算机系统应用》
2022年第5期382-387,共6页
Computer Systems & Applications
基金
广东省自然科学基金(2020A1515010566)
广西研究生教育创新计划(YCSW2021278)
深圳市科技计划(JCYJ20170306095959113)
广西省自然科学基金(2017JJD110009,2019AC04004)。
