摘要
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。
In order to improve the overall performance of embedding algorithm,this paper proposes a re- versible data hiding algorithm for color images based on three-difference histogram shifting and comple- mentary embedding. The algorithm uses correlation of color components and relationship between predic- tion errors to decrease difference and the peak of difference histogram is increased. The embedding scheme makes use of three-difference histogram shifting and double-embedding method to increase the capacity,and uses inverse direction to expand the pixel value,chooses two direction predictions to com- pute prediction error, the chance 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 signif- icantly improved compared with other algorithms.
出处
《光电子.激光》
EI
CAS
CSCD
北大核心
2013年第10期2010-2016,共7页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(60975021)资助项目
关键词
可逆信息隐藏
差值直方图平移
互补嵌入
色彩分量相关性
彩色图像
reversible data hiding
difference histogram shifting
complementary embedding
correlation of color components
color image