摘要
由于彩色图像3个通道具有高度相关性,基于这种相关性,我们提出了一种通道间插值的策略来进行可逆数据隐藏.基于朗伯反射和局部不变特性的假设,本文验证了图像中的局部色度相似性假设的正确性.利用这种相似性,我们提出使用通道间插值来产生插值图像.然后,计算插值图像和原图像之间的差,生成误差直方图并使用直方图平移来嵌入信息.整个嵌入过程先在非采样像素上进行,然后在采样像素上进行.在接收端,使用同样的通道间插值方法,可以在提取出嵌入信息的同时恢复原图像.由于利用了更多通道间的信息,本文提出的方法可以得到更精确的插值图像,进而提高可逆数据隐藏算法的性能.实验结果表明:与现有的方法相比,本文提出的方法具有更高的嵌入容量和峰值信噪比.
As three channels of color images are highly correlated,we propose the strategy of inter-channel interpolation for reversible data hiding（RDH）based on such correlations.With the assumption of Lambertian reflectance and local invariance,we verify that local chromaticity is similar.Using such similarity,we propose to generate an interpolated image with inter-channel interpolation.Next,a difference image is calculated between the original image and interpolated image for embedding additional data by histogram shifting.The whole embedding process is performed on non-sample and sample pixels in sequence.At the receiver side,the same inter-channel interpolation is applied,then additional data can be extracted and the original image is restored at the same time.As more information among channels is utilized,we obtain a more accurate interpolated image and improve the performance of RDH.The experimental results show that the proposed method achieves higher embedding capacity and better visual quality in terms of PSNR compared with existing methods.
作者
葛昊立
陈妍
王建军
GE Haoli;CHEN Yan;WANG Jianjun(Image and Intelligence Lab,School of Information Science and Technology,Fudan University,Shanghai 200433,China)
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
2018年第5期619-629,637,共12页
Journal of Fudan University：Natural Science
基金
国家自然科学基金(61170207)
关键词
可逆数据隐藏
彩色图像
通道间插值
局部色度
reversible data hiding（RDH）
color image
inter-channel interpolation
local chromaticity
