一种自适应彩色数字图像盲隐藏方法

An Adaptive Color Digital Image Blind Hiding Algorithm

提出了一种将24位真彩色图像隐藏于另一幅24位真彩色图像的新方法。该方法采用硬c均值聚类及多分辨率彩色量化技术,实现了彩色图像的自适应盲隐藏。它具有隐藏信息量大、恢复图像的误差小及使用方便的特点,对常见的图像处理与攻击具有一定的抵抗能力。另外,通过超混沌的置乱技术,使隐藏到载体图像中的数据有非常好的伪随机特征,具有很高的安全性。该方法在PC机上实验,得到较好的实验结果。

In the past, most image hiding techniques were applied only to gray scale images. Now, many valuable images are color images. Thus, it has become important to be able to hide color images. In this paper, an adaptive color digital image blind hiding algorithm is presented. A color scale secret image can be hidden in one color carrier image with the schemes. To increase the quantity of the embedded data, the hard c-means cluster and color quantization technology based on discriminative palettes can be used in the algorithm. In particular, in order to further enhance the security and robustness of the hidden image, the scrambling technology based on hyperchaotic mapping can be used as pre-process of color image information hiding. The coupled map lattices mapping is used to generate hyperchaotic sequences, and the secret image is encrypted by changed image pixels value and image pixels position. The initial parameters of hyperchaotic mapping can act as the private keys. The experimental results are satisfactory.