微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2010年
3期
22-25,28
,共5页
Contourlet变换%奇异值分解%盲水印%置乱技术
Contourlet變換%奇異值分解%盲水印%置亂技術
Contourlet변환%기이치분해%맹수인%치란기술
Contourlet transform(CT)%singular value decomposition(SVD)%blind watermarking%image scrambling
介绍了采用Contourlet变换的多尺度性、多方向性和SVD分解的稳定性特征对彩色图像嵌入数字水印的方法.先将RGB空间彩色图像转换为YUV空间,对明亮度分量Y进行Contourlet变换得到不同尺度不同方向上的系数,然后为了满足水印的不可见性和稳健性,对低频系数进行分块SVD分解,根据二值水印值修改左奇异矩阵U.
介紹瞭採用Contourlet變換的多呎度性、多方嚮性和SVD分解的穩定性特徵對綵色圖像嵌入數字水印的方法.先將RGB空間綵色圖像轉換為YUV空間,對明亮度分量Y進行Contourlet變換得到不同呎度不同方嚮上的繫數,然後為瞭滿足水印的不可見性和穩健性,對低頻繫數進行分塊SVD分解,根據二值水印值脩改左奇異矩陣U.
개소료채용Contourlet변환적다척도성、다방향성화SVD분해적은정성특정대채색도상감입수자수인적방법.선장RGB공간채색도상전환위YUV공간,대명량도분량Y진행Contourlet변환득도불동척도불동방향상적계수,연후위료만족수인적불가견성화은건성,대저빈계수진행분괴SVD분해,근거이치수인치수개좌기이구진U.
This paper introduced the color image digital watermarking which is implemented based on the multi-scale,multi-direction of the contourlet transform and stability of singular value decomposition.The given RGB color image is split into its three components in the YUV color space first,then the luminance component Y is chosen and decomposed by Contourlet transform and get scale factors of different directions.In order to meet the watermark invisibility and robustness,make low-frequency coefficients decompose blocks by SVD,and embedding the watermark data by modifying values of the left singular matrix U.
