三维混合变换彩色图像无损信息隐藏算法研究

Lossless information hiding algorithm research of color image on three-dimensional mixing transformation

对16M真彩色图像无损信息隐藏算法进行了研究,利用颜色空间变换和单个分量色彩的小波变换,以及相邻像素差值的三维混合变换实现图像的有效去冗余和稀疏化,提高频域高频分量自适应直方图调整算法的信息隐藏性能。采用KoDa Inc的16幅国际标准测试图像进行仿真,仿真结果表明,在直方图峰值点自适应平移1位的情况下,SHIRCT+DWT三维混合变换比单独小波变换嵌入容量平均提高128.9%,即平均多嵌入18426字节,PSNR平均提高0.66dB;YFbFr+差值三维混合变换比仅实施YFbFr变换嵌入容量平均提高400%,即平均多嵌入33898字节,PSNR平均提高0.39dB。该算法是有效、实用的无损信息隐藏算法。

1 6 M true color image lossless information hiding algorithm was researched.The transformation on color space,the DWT transformation on single color component and the three-dimensional mixed transformation on difference of adj acent pixels value were used to realize image redundancy reduction and to sparse more effective.This algorithm could improve information hi-ding performance of the high frequency component adaptive histogram adj ustment algorithm in frequency domain.The simulation experimental results on 1 6 KoDa Inc international standard test images showed that the embedding capacity of image increased by 128. 9%on average using the SHIRCT＋DWT three-dimensional mixing transformation method compared with the DWT trans-form on color component when adaptive histogram peaks shifted 1bit,which equaled to an increase of 18426bytes embedment on average and the PSNR average increased by 0. 66dB.When using the YFbFr＋three-dimensional difference mixing transform method,the embedding capacity increased by 400%on average,comparing with the only YFb Fr transformation implemented si-tuation,it was equal to an increase of 33898bytes on average,and the PSNR averagely increased by 0. 39dB.So this algorithm was an effective and practical lossless information hiding algorithm.