random permutation造句
例句與造句
- 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(jué)系統(tǒng)把數(shù)字水印嵌入到圖像視覺(jué)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(jì)出水印的形狀和嵌入的主要位置，對(duì)水印的檢測(cè)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(hào)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。 - It's difficult to find random permutation in a sentence. 用random permutation造句挺難的