摘要
文章利用GHM多小波一阶变换后最低分辨率子图的4个分量能量分布特性以及自适应颜色迁移理论中lαβ域对颜色的控制力和自适应颜色迁移公式对象素的修改能力,提出基于GHM多小波变换和自适应颜色迁移理论的信息隐藏算法。算法在LL2中嵌入鲁棒参数,以RAID4方式在LH2和HL2中嵌入隐藏信息,在HH2中嵌入脆弱性标识。算法应用Chebyshev混沌映射和遗传算法改变嵌入信息顺序,提高了信息与载体一致性。实验表明,算法的不可见性平均提高24.43%,鲁棒性提高19.25%以上,且感知篡改能力敏锐。
Aim.The introduction of the full paper reviews past research and points out the several techniques,including particularly GHM multi-wavelet transform and adaptive color transfer,that we utilize in our IH algorithm.Section 1 briefs the GHM multi-wavelet transform and the adaptive color transfer.Subsection 2.1 explains the information hiding with the help of the flow chart given in Fig.4.Subsection 2.2 explains the information extracting with the help of the flow chart given in Fig.5.Their cores consist of：（1） using the adaptive color transfer,we embed the hidden information in accordance with the embedding rule as stipulated in Table 1;（2） utilizing the characteristic that the energy of an image distributes to the four components（LL2,LH2,HL2 and HH2） in the proportion of 4.5：2.2：2.2：1.1 after first-order GHM multi-wavelet transform,we embed the hidden information in LH2 and HL2 components with RAID4;（3） with the Chebyshev chaotic map and the genetic algorithm,we improve the consistency between the bits order and the cover-image code;（4） we embed robust parameters in the LL2 component and the fragile sign in the HH2 component,thus determining whether the stego-image has been changed through comparing the RAID4 parity data of LL2 component with that of HH2 component.The experimental results,presented in Figs.6 through 11 and Tables 2,3 and 4,indicate preliminarily that our new and better IH algorithm can increase imperceptibility by 24.43% on the average and robustness at least 19.25%,and is sensitive to image distortion.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2010年第2期264-269,共6页
Journal of Northwestern Polytechnical University
基金
国家科技重大专项课题(2008ZX03006)资助
关键词
信息隐藏
GHM多小波变换
自适应颜色迁移
Chebyshev混沌映射
遗传算法
algorithms
wavelet transforms
information hiding（IH）
GHM（Geronimo Hardin Massopust） multi-wavelet transform
adaptive color transfer
Chebyshev chaotic map
genetic algorithm
