prefiltering 中文意思是什麼
prefiltering
解釋
前置濾波-
Optional ; prefiltering panel and sound reducing case
可選配預過濾面板和降噪箱。 -
Optional ; prefiltering panel and sound reducing case - noise level is cut down to 67db
可選配預過濾面板和降噪箱，噪音可降低到67db a -
Use this to dynamically register prefilters to run templates through before they are compiled. see template prefilters for more information on how to setup a prefiltering function
注冊一個在模板編譯之前執行的預過濾器。如何設立預過濾函數，請查看模板預過濾器。 -
Prefiltering is performed to ensure high - quality shrinking
執行預篩選以確保高質量的收縮。 -
No prefiltering is done
不進行預篩選。 -
Two - dimensional frequency estimation based on nonlinear prefiltering in frequency domain
二維諧波頻率的頻域非線性預濾波估計方法 -
Finally, the author argues that prefiltering a discrete signal is a necessary step before using unbalanced multiwavelets. in this thesis, the author applies orthonormal perfiltered and first - order balanced multiwavelet to the compression of ecg data respectively. by using orthonormal perfiltered we can acquire a better result than by using first - order balanced multiwavelet or by using single wavelet
對多小波而言，在變換之前對離散信號進行預處理是必須的，我們分別採用正交預濾波和一階平衡后的提升多小波對心電信號進行壓縮，正交預濾波的效果好於一階平衡，也好於一般的單小波。 -
On the base of summarizing the multiwavelet theory the thesis studied several preflltering methods before decomposited the image by multiwavelet at large and analysised the relationship between multiwavelet and preflltering methods from several points of view. simulation experiments proved that using preflltering method can greatly improve the image ' s energy centrality than not using prefiltering. and different methods brings out different effects to specified multiwavelet, which explained that preflltering is connected with specified multiwavelet. next, the author brought forward a new method based on above study, with several experiments validating this conclusion by computer
本論文在綜述了小波、多小波變換理論的基礎上，較詳盡地分析了幾種常用的多小波預處理方法，從多個角度研究了預處理方法與多小波系統之間的適應性關系，並通過計算機模擬試驗證明了採用合適的預處理方法比不採用預處理方法（即簡單的格式轉換）能提高分解后圖像能量的聚集程度。進一步還研究了對于特定的多小波而言，預處理方法是與之相匹配的，即運用不同的預處理方法能量聚集程度不同。
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