Orthogonalized convolution method and the harmonic analysis along satellite orbit are used to withdraw tidal wave from topex / poseidon satellite altimeter data in the bohai sea , yellow sea and east china sea 本文利用正交響應法和沿軌調和分析從渤黃東海的topex / poseidon衛星高度計資料中提取了主要分潮。
A few practical cone - beam reconstruction algorithms , including feldkamp , cross - convolution method and cone - convolution method are analyzed . some useful conclusion is drawn by comparing and evaluating the reconstruction result which comes from actual projection data 且對實際投影數據用這三種方法進行圖像重建,對這三種方法的重建結果進行比較、分析和評價得到一些有益的結論。
This thesis firstly analyzes and investigates the realization method of discrete wavelet transform and its corresponding lifting arithmetic . afterward , software simulations are carried out on the same image . the amount of the operation between the lifting method and the classic convolution method is compared and analyzed 首先,分析了離散小波變換原理,研究了對應提升方案的實現算法,并針對同一幅圖像進行軟件仿真,實驗結果表明提升方案和傳統卷積實現方案的處理效果相當,然而運算復雜度明顯降低。
Under the condition of space moving changed system and the engineering practice , a function of the pixel dimension , the mtf of ccd sensor imaging , the width of target strip and the image motion has been acquired 4 . under the condition of one pixel image motion and the nyquist frequencies , adopting the convolution method , the ratios of the mtf with image motion to the idea mtf are 0 . 667 這樣就為在工程實際中,在空間移變條件下,求取了ccd探測器影像的mtf 、像元尺寸、影像分辨力和像移量四者之間的一個簡潔的函數關系:材了萬二1一( 2 + n一m ) 2 ? o4n4 .采用仿真的方法和采用卷積方法的比較。