Robust color image hiding method in DCT domain  

作　　者：LI Qing-zhong YU Chen CHU Dong-sheng 

机构地区：[1]Engineering College , Ocean University of China, Qingdao 266071

出　　处：《Optoelectronics Letters》2006年第3期217-220,共4页光电子快报（英文版）

基　　金：This workis partially supported by National Science Foundation(Grant No.A0324676)

摘　　要：This paper presents a robust color image hiding method based on YCbCr color system in discrete cosine transform （DOT） domain,which can hide a secret color image behind a public color cover image and is compatible with the international image compression standard of JPEG. To overcome the grave distortion problem in the restored secret image,this paper proposes a new embedding scheme consisting of reasonable partition of a pixel value and sign embedding. Moreover, based on human visual system （HVS） and fuzzy theory,this paper also presents a fuzzy classification method for DOT sub-blocks to realize the adaptive selection of embedding strength. The experimental results show that the maximum distortion error in pixel value for the extracted secret image is ±1. And the color cover image can provide good quality after embedding large amount of data.

关 键 词：DCT 域值 图象隐藏 鲁棒性 离散分析 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]