基于三直方图平移和互补嵌入的可逆信息隐藏

为了提高嵌入算法的整体性能,提出一种基于三 差值直方图平移和互补嵌入的彩色 图像可逆信息 隐藏算法。利用色彩分量之间的相关性以及预测误差之间的关系减小差值,以增加差值直方 图的峰值。采 用三差值直方图平移和双重嵌入方法提高嵌入容量,两次嵌入过程中像素值沿相反方向扩展 ,部分像素值 扩展量相互抵消。选择两种不同的预测方向计算预测误差,以增加扩展量抵消的机会,解决 双重嵌入时图 像质量严重下降的难点问题。实验结果表明,本文算法在保证图像质量的同时大幅提高嵌入 容量,算法的整体性能优于其它同类算法。

Reversible information hiding based on three-difference histogram shifting and complementary embedding

In order to improve the overall performance of embedding algorithm,t his paper proposes a reversible data hiding algorithm for color images based on three-difference histogram shif ting and complementary embedding. The algorithm uses correlation of color components and relationship between pred iction errors to decrease difference and the peak of difference histogram is increased.The embedding schem e makes use of three-difference histogram shifting and double-embedding method to increase the capacity,and use s inverse direction to expand the pixel value,chooses two direction predictions to compute prediction error,the ch ance of expansion canceling out each other is increased,so the image quality is improved.Experimental results show the embedding capacity and the quality of stego-image are significantly improved compared with other alg orithms.