基于非下采样Contourlet的图像隐藏算法

摘要

图像隐藏是保密通信的重要技术,在军事领域有着广泛应用.文中提出了一种基于非下采样Contourlet的图像隐藏算法,将秘密图像的主要位平面信息嵌入载体图像低频区的奇异值矩阵,而将次要平面依载体图像高频子带能量的大小进行选择性嵌入,实现图像的有效隐藏.实验结果表明,文中方法在鲁棒性和不可见性方面均优于传统隐藏算法.%Image hiding is an important technology of secure communications,which has a broad application in the military field.This paper proposes an image hiding algorithm based on the nonsubsampled Contourlet.The main plane information of the secret image is embedded into the singular value matrix that is in the low frequency area of the carrier image.Meanwhile,the secondary plane is selectively embedded according to the size of high-frequency subband energy of the carrier image for hiding image effectively.The experimental results show that the algorithm is superior to the traditional algorithms in robustness and invisibility.