科技广场
科技廣場
과기엄장
SCIENCE TECHNOLOGY PLAZA
2014年
8期
26-29
,共4页
离散余弦变换%离散小波变换%Patchwork方法%彩色水印%彩色图像
離散餘絃變換%離散小波變換%Patchwork方法%綵色水印%綵色圖像
리산여현변환%리산소파변환%Patchwork방법%채색수인%채색도상
Discrete Cosine Transform%Discrete Wavelet Transform%Patchwork Method%Color Watermark%Color Image
本文提出了一种将彩色数字水印嵌入到彩色载体图像的新算法，利用改进的Patchwork方法将一级小波分解的水印图像的低频部分分别四次嵌入到经过离散余弦变换和离散小波变换后的载体图像的RGB分量中，提取的时候，将四次嵌入的低频分量取出并求平均值，用来作为水印的最终低频分量。经过实验验证，该算法对很多攻击具有很好的鲁棒性。
本文提齣瞭一種將綵色數字水印嵌入到綵色載體圖像的新算法，利用改進的Patchwork方法將一級小波分解的水印圖像的低頻部分分彆四次嵌入到經過離散餘絃變換和離散小波變換後的載體圖像的RGB分量中，提取的時候，將四次嵌入的低頻分量取齣併求平均值，用來作為水印的最終低頻分量。經過實驗驗證，該算法對很多攻擊具有很好的魯棒性。
본문제출료일충장채색수자수인감입도채색재체도상적신산법，이용개진적Patchwork방법장일급소파분해적수인도상적저빈부분분별사차감입도경과리산여현변환화리산소파변환후적재체도상적RGB분량중，제취적시후，장사차감입적저빈분량취출병구평균치，용래작위수인적최종저빈분량。경과실험험증，해산법대흔다공격구유흔호적로봉성。
This paper proposes a new algorithm to embed digital color watermark into color vector images. The algorithm uses improved patchwork method to embed the low frequency part of level wavelet decomposition of watermark into the RGB components of the image carrier after discrete cosine transform and discrete wavelet transform for four times. When extracting watermarking, it needs to take out the four embedded low frequency components and average them, and then the averaged components were used as the final frequency component of the watermark. Experimental results show that the algorithm has a good robustness against many attacks.
