采用相邻像素预测的可逆信息隐藏算法

为了提高图像信息隐藏算法的信息嵌入容量和载密图像的保真度,提出一种采用相邻像素预测的可逆信息隐藏算法.构建局部线性预测模型,以待预测像素的3个相邻像素为目标像素,通过目标像素的相邻像素建立线性方程组,求解预测模型参数.应用预测模型进行预测,计算预测误差,绘制预测误差直方图,通过直方图平移实现可逆信息隐藏.实验结果表明:文中算法可通过较少的预测像素进行预测,比其他算法具有更高的预测精度和更大的信息嵌入容量.

Reversible Data Hiding Algorithm Using Adjacent Pixels Prediction

In order to improve the data embedding capacity of the image data hiding algorithm and the fidelity of the masked image, this paper propose a reversible data hiding algorithm based on adjacent pixels prediction. Building local linear prediction model and taking the three adjacent predicted pixels as the target pixel, the linear equations are established with the adjacent pixels of the target pixel, and the parameters of the prediction model are solved. Using the prediction model to predict, calculate prediction error and plot prediction error histograms, then implement reversible date hiding algorithm by histogram shift. The experimental results show that the proposed algorithm in this paper can predict with fewer prediction pixels, and has higher prediction accuracy and larger data embedding capacity than that of other algorithms.