基于离散四元数傅里叶变换的彩色图像信息隐藏技术

为了提高秘密信息传输的安全性，将离散四元数傅里叶变换(DQFT)应用于彩色图像的信息隐藏技术中，提出了一种在彩色图像中嵌入秘密信息的新技术。应用四元数理论把彩色图像作为一个整体进行傅里叶变换，在彩色宿主图像的DQFT变换域中实现秘密信息的嵌入。实验结果表明，该方法简单易行、保密性强，对高斯噪声和椒盐噪声及剪切、缩放等攻击具有较好的鲁棒性。

Color image steganography using discrete quaternion Fourier transforms

This paper proposed a new method for color image steganography using discrete quaternion Fourier transforms (DQFT).The host color image could be described as a quaternion matrix and should be transformed to the DQFT domain,the secret image should be encrypted first and then the encrypted color image could be embedded into the DQFT domain of the host image. The principle of embedding was detailed and the robustness of the system had been examined experimentally.Experimental results show that this method is robust against Gaussian noise,salt & pepper noise,cropping and image scaling attack.