invariants 中文意思是什麼
invariants
解釋
不變性-
Recognition of 2 - d axile symmetry shapes based on moment invariants
基於不變矩的軸對稱形狀識別 -
The calculation of local invariants for bipartite systems
二子系復合系統定域不變量的計算 -
An application of the invariants of two conics
2條二次曲線不變量的一個應用 -
Study on moment invariants of the images of intravenous needles
輸液針圖像矩不變量的研究 -
13 rivlin e, weiss i. local invariants for recognition. ieee trans. pattern analysis and machine intelligence, 1995, 17 : 226 - 238
本文的主要貢獻包括以下幾點：第一，提出了一種一致的特徵匹配方法以獲得可靠的對應點估計。 -
But they are very sensitive to image noise and points delocalization error. in order to use the invariants, the local geometric constr aint must be added
但同時，由於興趣點的局部灰度差分不變量對噪聲及點位置偏差很敏感，所以在做實際圖像匹配時必須加上局部幾何限制。 -
This feature extraction method is simple and the precision has little effect on feature invariants because of expanding the scope of the template
這種特徵提取的方法簡單，並且由於擴大了模板取值范圍，使識別效果受特徵點漏檢的影響較小。 -
Image processing, 1995, 4 : 1 - 10. 19 pajdla t, van gool l. matching of 3 - d curves using semi - differential invariants. in proc
需要特別指出的是，本文提出的方法不僅僅是一個曲線匹配新方法，同時也著眼于把知識融合到圖像分析中去。 -
The proof of the second entropy invariants of lorenz map
映射第二類熵不變式的證明 -
In recent years, the excellent properties of moments and moment invariants computed from two - dimensional or three - dimensional shapes have aroused great attention, and researchers explored a wide range of moment applications
近年來，由二隹和三維形狀所求取的矩及矩不變量的優良特性已引起了圖像界人士的高度重視，並開發了大量的應用。 -
In consideration of the large feature dimensions of the wavelet moment invariants, we first choose a set of better features by combining divergence with sequential forward selection and this can be an off - line computation process
針對小波矩不變量特徵維數比較多的情況，本文採用結合離散度和順序前進法的特徵選擇方法，先離線選取一組較優特徵量。 -
The experimental results show that the invariants are efficient and robust to recognize objects and even to recognize the object with some information missing. ( 5 ) the algorithm of the symmetry detection is presented base on ii ? curves
實驗表明，獲得的不變量對物體識別十分有效，能克服噪聲的影響，對缺失部分信息的物體仍然有很好的識別能力。 -
The new algorithms for classification of mpsk, mask and mqam signals using cumulant invariants are proposed in gaussian noise and ideal communication channel environment. the new classification features are blind to unknown snr and reference phase
提出了在高斯噪聲和理想通道環境下，基於高階累量不變量特徵的mpsk 、 mask和mqam信號調制分類演算法，新特徵對信噪比和未知的參考相位參數是盲的。 -
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關系；總結了平面上基於點、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關系求解2d射影變換來構造「虛元素」的方法，結合「實元素」和「虛元素」可以提取更多的空間3d不變量。 -
Topics include : lorentz transformations, length contraction and time dilation, four vectors, lorentz invariants, relativistic energy and momentum, relativistic kinematics, doppler shift, space - time diagrams, relativity paradoxes, and some concepts of general relativity
題目包括：洛倫茲變換、長度收縮、以及時間膨脹、四種向量、洛倫茲不變數、相對論性能量與動量、相對論性運動學、多普勒位移、空間-時間圖，相對論中的佯謬、和一些廣義相對論的概念。 -
In the aspect of blind - identification, the mutual power spectrumx time - frequency distribution product of two delay signals are used as the features of classification. the cluster analysis and cumulant invariants of mpsk signals are used to automatically classify communication signals
在信號識別中，選取信號的互功率譜、時頻分佈、 mpsk信號的延遲相乘信號作為分類特徵，利用模式識別中的聚類分析以及mpsk信號的基於高階累積量構成的分類特徵不變量實現了信號調制類型的自動分類。 -
On the basis of formation and operation principles of the bar code identification system, the author has studied the moment - invariants theory of pattern recognition, and combined the other image processing techniques, then developed a bar code identification system which can recognize not only the lightly contaminated and incomplete bar code but also the distorted bar code with arbitrarily angle. using the idea of the layers, the author has consteructed a kind of two dimension barcode, and developed the identification system for it
在簡介條碼識別系統的組成及工作原理的基礎上，作者針對條碼圖像攝入過程中可能遇到的種種情況，以矩不變為特徵的模式識別理論為依據，結合矩陣分割和其他數字圖像處理技術，開發出不僅能對輕度污染與殘缺的條碼進行識讀，而且能對任意角度有畸變的條碼圖像進行快速識別的一維條碼譯碼系統。 -
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，將共點四線交比用於目標輪廓上的關鍵點的特性描述中；利用調和共軛關系，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演算法；利用交比關系構造了目標的形心不變量，提出了一種針對旋轉對稱型目標的旋轉對稱單元判定、旋轉中心提取的演算法；進一步利用3d不變量和2d射影變換，實現了一定條件下的對稱性目標的形狀恢復技術。 -
Through the studies of the invariants of the single axis motions, computational theories have been developed in this thesis to provide practical solutions for the problem of structure and motion from fitting the corresponding points in the whole sequence to its conic locus or conies for short. it is then shown that all single axis geometry can be directly computed either from one conic and one fundamental matrix or from at least two conies. the rotation angles then can be calculated directly from using the laguerre formula
本文通過詳細分析單軸旋轉運動中的不變量，利用物體點在單軸旋轉運動中軌跡為圓，而在圖象平面的投影為二次曲線的這一特徵，以二次曲線為分析的基元，研究了求解單軸旋轉運動結構問題的新理論和一系列新演算法，並在此基礎上完成了物體的三維重建等工作。 -
These ideas, published in a research paper in 1998, built on the discovery that certain mathematical quantities known as knot invariants were associated with the quantum physics of a two - dimensional surface evolving in time
傅利曼的想法奠基於一項數學發現：某些屬于結不變量的數學量，和二維曲面隨著時間而演變的量子物理有關。
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