安阳师范学院学报
安暘師範學院學報
안양사범학원학보
Journal of Anyang Normal University
2015年
5期
40-43
,共4页
Logistic映射%FRFT%峰值信噪比%标准加权类
Logistic映射%FRFT%峰值信譟比%標準加權類
Logistic영사%FRFT%봉치신조비%표준가권류
Logistic map%FRFT%PSNR%standard weighted class
提出了一种基于标准加权类分数傅里叶变换的数字水印算法.该算法首先用Logistic映射生成混沌二进制序列对水印图像进行置乱处理,然后对载体图像进行标准加权分数傅里叶变换,选择适当的嵌入强度,将水印的近似和细节信息分别嵌入到分数傅里叶变换的实部和虚部中,最后的数值仿真表明该算法既能保持载体图像的质量,又使水印的细节部分可见,具有较好的鲁棒性和不可感知性,在信息安全中有一定的实用性.
提齣瞭一種基于標準加權類分數傅裏葉變換的數字水印算法.該算法首先用Logistic映射生成混沌二進製序列對水印圖像進行置亂處理,然後對載體圖像進行標準加權分數傅裏葉變換,選擇適噹的嵌入彊度,將水印的近似和細節信息分彆嵌入到分數傅裏葉變換的實部和虛部中,最後的數值倣真錶明該算法既能保持載體圖像的質量,又使水印的細節部分可見,具有較好的魯棒性和不可感知性,在信息安全中有一定的實用性.
제출료일충기우표준가권류분수부리협변환적수자수인산법.해산법수선용Logistic영사생성혼돈이진제서렬대수인도상진행치란처리,연후대재체도상진행표준가권분수부리협변환,선택괄당적감입강도,장수인적근사화세절신식분별감입도분수부리협변환적실부화허부중,최후적수치방진표명해산법기능보지재체도상적질량,우사수인적세절부분가견,구유교호적로봉성화불가감지성,재신식안전중유일정적실용성.
Based on a standard class weighted fractional Fourier transformation a digital watermarking algorithm is proposed.The algorithm first chaotic binary sequences is generated by Logistic mapping to scrambling water -mark image processing , then the carrier image standard weighted fractional Fourier transform , and select the appropriate embedding strength , to embed the watermark approximation and detail information respectively fractional Fourier transform of real part and imaginary part of the final numerical simulation show that the algo -rithm can not only keep the quality of the image , and the details of the watermark is visible , it has good ro-bustness and perceptual , and a certain practicality .
