projective transformation造句
例句與造句
- Projective transformation of rational quadratic bzier curves
曲線的射影變換 - Regular projective transformation
正則射影變換 - Necessary and sufficient condition of 2 - dimension projective transformation being involution
二維射影變換是對合的充要條件 - Some properties of projective transformation on projection plane producing by polar transformation
配極變換誘導(dǎo)的直射變換的若干性質(zhì) - First , we compute the larger spatial transformation . then , we refine the parameters using projective transformation . it is proved that this method can produce good result and fast speed
我們采用的是基于頻域仿射模型的光流方程，即首先計算比較大的空間變換，然后再對其進行透視變換求精，實驗證明這樣既可以獲得較好的效果，也提高了計算速度。 - It's difficult to find projective transformation in a sentence. 用projective transformation造句挺難的
- In two - view case , a method is presented for calculation 2d projective transformation and construction the virtual elements by combination of spatial points and lines . so more 3d invariants of object ' s spatial structures can be extracted from real elements and virtual eleme nts . ( 3 ) the geometric characteristics of 2d symmetric objects " in perspective images are lucubrated
( 2 )擴展了2d射影變換矩陣的求解方法，將單純利用點集對應(yīng)的計算模式擴展到利用直線集、點線組合等多種類型來建立兩個射影平面的對應(yīng)關(guān)系；總結(jié)了平面上基于點、直線元素可求解的多種3d不變量；提出了雙視圖下由點、直線元素的多種對應(yīng)關(guān)系求解2d射影變換來構(gòu)造“虛元素”的方法，結(jié)合“實元素”和“虛元素”可以提取更多的空間3d不變量。 - Finally , a method is put forward to construct the nurbs curves on sphere , which extends the de boor recursive algorithm in r3 to one on the sphere by replacing the geodesic distances for the lines and studies their many geometric properties analogous to those in euclidean spaces , such as the differential property , the local property , the parameter invariance under a projective transformation , and so on
兩種方法均給出誤差估計，使逼近螺線可達到任何預(yù)先給定的精確階。最后，給出球面nurbs曲線生成算法：用球面上測地線? ?劣大圓弧代替直線段，將歐氏空間r ~ 3中的deboor遞推算法推廣到球面上構(gòu)造曲線。 - Second , more feature points are extracted for advanced registration based on projective transformation . compared with the ordinary method , our method has a better robust feature with higher accuracy , it also has a fully automatic feature so it need little human intervention in the whole process . the image segmentation , feature extraction , feature correspondency , and transformation model of multi - modality medical image registration are also studied in this paper
本研究的創(chuàng)新之處:針對rf和fa視網(wǎng)膜圖像的特點，提出了新的血管細化的新方案;在特征點提取方面，提出了“三輪定心”這種新的特征點提取方法;提出了由“粗配”到“細配”的混合配準方法;力矩主軸法用于圖像配準參數(shù)的估計及對應(yīng)性尺度參數(shù)范圍的定值。 - We introduce five topological characteristics and geometry characteristics that are invariant under projective transformation specially perspective projection . the definition of homograph is given by means of these characteristics , and then the recognizing method of the homograph is proposed according to the definition of homograph
接著，根據(jù)透視投影不變性提出了5個用來描述多邊形形狀的拓撲特征和幾何特征，這些特征在透視投影下是不變的，以這些特征給出了在透視投影下平面多邊形為類似形的定義。 - Based on projective geometry , the research works about 3d invariance ' s extraction and application have been done in this thesis as following : ( 1 ) the basic theories and concepts in projective geometry are systematically summarized . it includes : the camera models of perspective imaging , projective collineation , cross ratio , a simple compare about invariance ( invariant ) among some geometry transformations , fundamental matrix , epipolar and epipolar line in epipolar geometry , and so on . ( 2 ) the calculation methods for 2d projective transformation are extended from points to multi - element , which includes points , lines , points lines and so on , to get the relationship between two projective planes
基于射影幾何理論，論文圍繞3d不變特征的提取和應(yīng)用進行了如下的研究工作： ( 1 )系統(tǒng)總結(jié)了射影幾何中的若干基礎(chǔ)概念，包括：透視成像的相機模型、射影對應(yīng)、交比不變量、基于不同幾何變換下的不變量的簡單對比、對極幾何中的基礎(chǔ)矩陣、對極點、對極線等。 - For bilateral symmetry objects , the techniques on symmetry - point detection and symmetry - axis extraction are presented based on harmonic conjugation relationship . for rotated symmetry objects , the techniques on rotated units description and rotated symmetry center extraction are presented based on center invariants of objects . further more , by using 3d invariants and 2d projective transformation , an approach to recover shape from part symmetry objects is realized on some conditions
( 3 )深入分析了2d對稱性目標透視成像的幾何特點，將共點四線交比用于目標輪廓上的關(guān)鍵點的特性描述中；利用調(diào)和共軛關(guān)系，提出了一種針對左右對稱型目標的對稱點檢測和對稱軸提取的算法；利用交比關(guān)系構(gòu)造了目標的形心不變量，提出了一種針對旋轉(zhuǎn)對稱型目標的旋轉(zhuǎn)對稱單元判定、旋轉(zhuǎn)中心提取的算法；進一步利用3d不變量和2d射影變換，實現(xiàn)了一定條件下的對稱性目標的形狀恢復(fù)技術(shù)。