现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2013年
17期
59-61,64
,共4页
赵松杰%张亚博%宣龙健
趙鬆傑%張亞博%宣龍健
조송걸%장아박%선룡건
数字水印%二维经验模式分解%离散余弦变换%抗攻击鲁棒性
數字水印%二維經驗模式分解%離散餘絃變換%抗攻擊魯棒性
수자수인%이유경험모식분해%리산여현변환%항공격로봉성
digital watermark%BEMD%DCT%anti-attack robustness
数字水印是解决数字产品版权问题的一个有效手段,不可见性和鲁棒性是数字水印的关键。为了平衡数字水印的不可见性和鲁棒性,提出了一种基于二维经验模式分解和离散余弦变换的图像数字水印算法。对原图像做BEMD分解,获得其相应的若干固有模态函数(IMF)和一个余项(Residue),对分解的最后一个固有模态函数进行离散余弦变换,将水印信息嵌入到图像在DCT域的中频分量。实验结果表明,该算法具有较好的不可见性和抗攻击的鲁棒性。
數字水印是解決數字產品版權問題的一箇有效手段,不可見性和魯棒性是數字水印的關鍵。為瞭平衡數字水印的不可見性和魯棒性,提齣瞭一種基于二維經驗模式分解和離散餘絃變換的圖像數字水印算法。對原圖像做BEMD分解,穫得其相應的若榦固有模態函數(IMF)和一箇餘項(Residue),對分解的最後一箇固有模態函數進行離散餘絃變換,將水印信息嵌入到圖像在DCT域的中頻分量。實驗結果錶明,該算法具有較好的不可見性和抗攻擊的魯棒性。
수자수인시해결수자산품판권문제적일개유효수단,불가견성화로봉성시수자수인적관건。위료평형수자수인적불가견성화로봉성,제출료일충기우이유경험모식분해화리산여현변환적도상수자수인산법。대원도상주BEMD분해,획득기상응적약간고유모태함수(IMF)화일개여항(Residue),대분해적최후일개고유모태함수진행리산여현변환,장수인신식감입도도상재DCT역적중빈분량。실험결과표명,해산법구유교호적불가견성화항공격적로봉성。
Digital watermark is an efficient method to solve the copyright issue of digital products. The key points of the digital watermark are the invisibility and robustness. An image digital watermark algorithm based on bidimensional empirical mode decomposition(BEMD)and discrete cosine transform(DCT)is proposed to balance the invisibility and robustness. The BEMD of the original image was performed to obtain the corresponding intrinsic mode function (IMF) and a residue. The last one of FMFs given in the first step is transformed according to DCT,and the watermark information is embedded into the intermediate frequency component in DCT domain. The experimental results show that the algorithm has better invisibility and robustness against attacks.