√天堂资源网最新版在线 ,播五月开心婷婷欧美综合

TranslationMobile

隨機(jī)置換

"random" in Chinese : n. 〔罕用語〕胡亂行為，偶然的[隨便的]行動[過程]。 ...
"permutation" in Chinese : （數(shù)學(xué)中）排列變化，徹底改變; 而不是排列; 離子交換使水軟化; 排列，交換 ...
"gerade permutation even permutation" in Chinese : 偶置換
"affine permutation" in Chinese : 仿射置換
"all permutation" in Chinese : 全順列
"alternate permutation" in Chinese : 交錯排列
"andre permutation" in Chinese : 安得列置換
"circular permutation" in Chinese : 環(huán)狀排列; 循環(huán)的變換; 循環(huán)交替變換，環(huán)狀變換; 循環(huán)排列; 致環(huán)交換
"column permutation" in Chinese : 列置換, 列排列
"combination, permutation and" in Chinese : 排列組合
"cycle of permutation" in Chinese : 排列的循環(huán)
"cyclic permutation" in Chinese : 環(huán)狀排列; 循環(huán)排列
"cyclical permutation" in Chinese : 循環(huán)排列
"discordance permutation" in Chinese : 不和諧排列
"discordant permutation" in Chinese : 不和諧排列

Examples

Random group and random permutation of idea
的隨機(jī)群和隨機(jī)置換
Since watermark is added to visually more important regions of host image according to human visual system , and a pseudo - random permutation is performed in the wavelet domain before the watermark is embedded , which disperse the spatial relationship of pattern . therefore , even if the shape or the major location of the watermark is estimated , it ' s extremely difficult to detect or destroy the watermark with the cipher of permutation unknown
由于利用人眼視覺系統(tǒng)把數(shù)字水印嵌入到圖像視覺較重要區(qū)域中，并且水印在嵌入前進(jìn)行了小波域上的偽隨機(jī)置亂，打亂了水印的空間關(guān)系，因此在置亂密鑰未知的情況下，即使能估計出水印的形狀和嵌入的主要位置，對水印的檢測和破壞也是非常困難的。
The watermarking scheme based on wavelet decomposition and discrete cosine transform using a binary pattern or gray - level pattern as the watermark , the scheme initially performs wavelet decomposition of the host image and the watermark with different hierarchy . after the pseudo - random permutation , each decomposed layer of the watermark is embedded into the dct domain of corresponding decomposed layer of the host image
基于小波分解和余弦變換結(jié)合的水印方案算法以二值圖標(biāo)或灰度圖標(biāo)作為水印，將原圖像和水印信號分別進(jìn)行不同層次的小波分解，分解后的水印各分量偽隨機(jī)置亂后分別嵌入到原圖像相應(yīng)分解層各分量的dct域中。