共軛方向搜索 的英文怎麼說
中文拼音 [gòngèfāngxiàngsōusuǒ]
共軛方向搜索
英文
conjugate direction search- 共 : 共動詞[書面語]1. （圍繞） surround2. （兩手合圍） span with the hand
- 軛 : 名詞（牲口拉東西時架在脖子上的器具） yoke
- 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
- 搜 : 動詞1. （尋找） collect; gather2. （搜查） search; ransack
- 索 : Ⅰ名詞1 （大繩子; 大鏈子） a large rope 2 （姓氏） a surname Ⅱ動詞1 （搜尋; 尋找） search 2 （要; ...
- 方向 : direction; orientation
- 搜索 : 1 （仔細尋找） search for; ferret about; hunt for; scout around 2 [電子學] hunting; scan; [控] in...
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It has been deduced that the search direction remains the same but that the step length decreases in optimizing the improved cost function with the conjugate gradient algorithm from the gradient of the cost function that the fir filter apporaches the contrary point spread function ( psf ) more, and that the estimated image is closer to the original one
從代價函數的梯度入手推導出共軛梯度演算法，其搜索方向保持不變而搜索步長變小，使濾波系數更加退近於點擴展函數逆運算元，從而使估計圖像與原始圖像更加接近。In chapter 3, by minimizing a quadratic model restricting next search direction to a subset of span { - g _ ( k ), d _ ( k - 1 ) }, we propose other formula of parameter ~ ( * ) k convergences of the new method and its hybrid formula are proved under monotone line search. their numerical results show that they are efficient
在第三章中，通過最小化一個限制下次搜索方向在span { - g _ k ， d _ （ k - 1 ） }子集上的二次模型，我們提出了_ k ~ *取新形式或其雜交形式的共軛梯度法是有效的。As a straightforward method, the full search algorithm ( fs ) is widely used because of its high performance. usually, fs is computationally expensive in a video encoder. as a result, in order to reduce the heavy computational load of fs, active research has focused on fast bmas for a long time and several sub - optimal search algorithms for block - based motion estimation have been developed. these include : three step search ( tss ), four step search ( fss ), two - d logarithmic search, orthogonal search, cross search, etc
目前塊匹配運動估計演算法有很多，如全搜索法、三步法、共軛方向搜索法、二維對數搜索法、交叉搜索法、鉆石搜索法以及四步搜索法等，它們各有優缺點，全搜索法精度高，但計算量大，三步搜索法和交叉搜索法搜索速度較快，但搜索誤差較大，容易陷入局部最小值。
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