计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2015年
6期
1494-1497,1503
,共5页
图像水印%奇异值分解%提升小波变换%量化%鲁棒性%盲提取
圖像水印%奇異值分解%提升小波變換%量化%魯棒性%盲提取
도상수인%기이치분해%제승소파변환%양화%로봉성%맹제취
image watermarking%singular value decomposition%lifting wavelet transform%quantization%robustness%blind ex-traction
为进一步提高水印抵抗攻击的能力，提出一种基于量化的混合提升小波变换和奇异值分解的自适应数字图像水印算法。对二值水印信号进行异或加密与置乱处理，以增强水印信号的安全性和鲁棒性；对原始载体图像进行互不重叠的分块，对随机选取的分块进行一级提升小波变换，对生成的低频子带进行奇异值分解；根据水印信号的取值，对每一分块低频子带的最大奇异值采用自适应量化的方法嵌入水印信号。仿真结果表明，该算法具有较好的透明性和抵抗常规信号处理攻击的能力。
為進一步提高水印牴抗攻擊的能力，提齣一種基于量化的混閤提升小波變換和奇異值分解的自適應數字圖像水印算法。對二值水印信號進行異或加密與置亂處理，以增彊水印信號的安全性和魯棒性；對原始載體圖像進行互不重疊的分塊，對隨機選取的分塊進行一級提升小波變換，對生成的低頻子帶進行奇異值分解；根據水印信號的取值，對每一分塊低頻子帶的最大奇異值採用自適應量化的方法嵌入水印信號。倣真結果錶明，該算法具有較好的透明性和牴抗常規信號處理攻擊的能力。
위진일보제고수인저항공격적능력，제출일충기우양화적혼합제승소파변환화기이치분해적자괄응수자도상수인산법。대이치수인신호진행이혹가밀여치란처리，이증강수인신호적안전성화로봉성；대원시재체도상진행호불중첩적분괴，대수궤선취적분괴진행일급제승소파변환，대생성적저빈자대진행기이치분해；근거수인신호적취치，대매일분괴저빈자대적최대기이치채용자괄응양화적방법감입수인신호。방진결과표명，해산법구유교호적투명성화저항상규신호처리공격적능력。
To further enhance the ability of the watermarking to resist attacks ,a adaptive digital image watermarking algorithm based on quantization in lifting wavelet transform (LWT) and singular value decomposition (SVD) domain was proposed .First‐ly ,to enhance the safety and robustness of watermarking ,the binary watermarking signal was preprocessed using XOR encryp‐tion and Arnold transform .Secondly ,original image was subdivided to non‐overlapping blocks and 1‐level lifting wavelet trans‐form was performed for each selected blocks ,and singular value decomposition was applied to the low frequency sub‐band .Final‐ly ,according to the value of the binary watermarking signal ,the biggest singular value of low frequency sub‐band was modified by exploiting adaptive quantification method to embed watermarking .Experimental results show that the proposed algorithm has good transparency and it is robust against common signal processing .
