geometric distortion 中文意思是什麼

geometric distortion 解釋
幾何畸變
  • geometric : n. 有幾何圖形的東西。adj. 1. 幾何學的，幾何圖形的。2. 按幾何級數增長的。adv. -rically
  • distortion : n. 1. 歪扭，扭曲。2. 【電學】（信號、波形等的）失真；【物理學】（透鏡成像產生的）畸變；【醫學】扭轉，變形。3. 竄改，歪曲，曲解。adj. -al
  1. Base on the mathematic model of load - deflection relationship of the rectangular membrane, micro balloon actuator ' s theory curve of pressure - deflection has been calculated and plotted. after the simplified geometric model of microactuator was set up, by utilizing ansys mooney - rivlin hyperelastic model, nonlinear structural distortion of silicone rubber can be solved

    通過建立氣泡薄膜的幾何簡化模型，針對硅酮橡膠的材料非線性特點，選用了適合橡膠類材料的mooney - rivlin超彈性模型，運用ansys軟體對這一非線性結構變形進行了求解。
  2. According to the characteristic of ieee 1394 with wide bandwidth, common and real - time, the author put forward ieee 13 94 should be applied into real - time digital video transfer in optics - electronics theodolite. before engineering realization, carried out a video image transfer test on three types of digital video tape recorders and camera with ieee 1394 interface. we found that digital videos without compression transfered under ieee 1394 standard ( transfer from 4. 5m to 100m ), compared with analog videos, have no geometric distortion, and have better luminance, contrast, definition

    作為工程實現前的實驗研究，對三類具有ieee1394介面的數字錄像機和攝像機進行了視頻圖像傳輸實驗，發現無壓縮格式的按ieee1394標準傳輸的數字視頻圖像（傳輸距離從4 . 5米到100米之間） ，較原始模擬視頻圖像在幾何位置信息上沒有衰變，而在亮度、對比度、邊緣清晰度這些方面有明顯的優勢；但是按dvcam壓縮格式（常見于sony公司的系列產品，是5 ： 1的dct幀內壓縮）壓縮的數字視頻圖像，較原始模擬參照圖像有明顯的幾何畸變。
  3. By an investigation to various examples, it is found that the texture distortion is mainly produced from the discord of direction variation between texture and surface geometric, incurred by the simplification to the surface

    從另一個角度對紋理扭曲的產生原因進行了分析，認為紋理扭曲主要是由於簡化導致模型表面幾何方向變化和紋理方向變化不一致造成的。演算法因此根據幾何和紋理方向變化來度量紋理扭曲的程度。
  4. It has been tested that this algorithm can successfully resist geometric distortion

    實驗證明該演算法對幾何形變具有很好的頑健性。
  5. Because of the phase errors caused by aircraft ' s motion errors, accurate motion compensation should be applied to get high resolution, high contrast and low geometric distortion sar images

    因為由雷達載機運動誤差帶來的相位誤差，為了獲得高分辨力、高對比度、小幾何變形的圖像，就需要進行精確的運動補償。
  6. On the assumption of ignoring the distortion of thickness, this paper determines the rough shape by the geometric modeling method of equal area developing using mixed mesh cell of triangle and quadrangle for the first time, presents the equal area developing arithmetic of quadrangle - triangle. on the virtual geometric symmetry axis, we puts forward the method of determining the developed coordinate of the point on the base band in the development of using regular quadrangle cell, determines the developed shape of internal structure in plane utilizing point - to - point mapping theory. furthermore, we realize the approximate developing of undeveloped - irregular boundary surface using a few triangle cells

    本文結合型號研製中小曲率機翼整體壁板類零件坯料展開課題，基於板料厚向變形忽略不計的先驗假設，首創混合四邊形-三角形網格等面積展開的幾何模擬法確定壁板類零件毛坯外形，給出了混合四邊形-三角形網格等面積展開演算法；提出了虛擬分割線的概念，採用虛擬幾何對稱軸，給出了規整四邊形單元展開基帶上結點的計算方法；採用映射原理和求交演算法確定了壁板內部結構信息的展開定位。
  7. Moreover, the current development status of sedimentation simulation research in china was demonstrated and five big trends for the future development of sedimentation simulation technologies were analyzed. the geometric similitude, kinematic similitude and kinetic similitude between the lab model and the prototype for sedimentation simulation form the basis of three similitude principles, while three similitude rules, i. e., the suspension similitude rule, the particle movement similitude rule and the riverway distortion similitude rule can be deduced from the three similitude principles, and thee principles and rules are the basic theories for the development of physical simulation about the clastic sedimentation processes

    沉積模擬實驗模型及原型的幾何相似、運動相似、動力相似及其由上述三個相似性原理導出的懸浮相似、顆粒運動相似及河道變形相似等三個相似準則是開展碎屑沉積過程物理模擬的基本原理；在此基礎上，論述了碎屑沉積模擬研究的主要方法?自然模型法和比尺模型法；提出了開展碎屑沉積過程物理模擬的主要方法步驟，這是本論文第二章的主要內容。
  8. In the imaging system, the calibration of nonlinear geometric distortion is still a problem

    摘要在成像系統中，非線性幾何畸變的高精度數字校正仍然是一個未能很好解決的問題。
  9. Geometric distortion is traditionally corrected by an image resampling operation which is applied as a post - processing step to pfa. the scene size limits of pfa presented by range curvature qpe, can be alleviated by using an efficient image domain space - vairant post - filter

    通常採用圖像域插值的方法校正幾何失真，而利用空變濾波器使散焦的點重新聚焦，這些校正方法可以減輕距離彎曲對成像范圍的限制。
  10. Investigation using remote sensing ( rs ) technology can breakthrough the limits of traditional methods, make full use of its capability of integration, visualization, rapidity and vast - dimensions analysis, and get better results the paper takes the up - to - date landsat - 7 etm + data, which is the most widely used, and quickbird data, which has the highest resolution nowadays, and according the features of the data and landslides, processes the quickbird data with 1 : 10 000 dem orthophoto correction and the landsat - 7 etm + data as follows : ( 1 ) selecting optimal spectrum band : selects 753 bands as the optimal bands ; ( 2 ) image intensifying : selects the principle components processing method on the basis of comparing several image intensifying methods ; ( 3 ) rigour geometric direction : corrects the geometric distortion of the map ; ( 4 ) image fusion : mainly takes his space transform fusion and resolution fusion method, and acquires maps with higher spectrum resolution as well as space resolution. after that, the visual effect of the image has been enhanced, and the interpretation precision

    採用遙感技術，可以突破傳統調查方法的限制，發揮其宏觀、綜合、直觀、快速的特點，取得更好的效果。論文選取目前應用最廣的陸地衛星最新系列landsat - 7etm +數據和空間解析度最高的商業衛星quickbird數據作為主要的數據源，根據數據的特點及滑坡災害應用特徵，對quickbird遙感數據則基於1 ： 10000dem進行了正射校正，對etm +遙感數據進行了波段優選，選取了753作為最佳組合波段；圖像增強，通過各種增強處理方法的效果對比，選擇主成分分析法對圖像進行增強；幾何精校正，糾正圖像的幾何變形；影像融合，主要選取了效果較好的his空間變換融合和解析度融合，得到的圖像既具有較高的光譜解析度，同時也具有較高的空間解析度。經過上述數字處理，較好地改善了圖像的視覺效果，提高了圖像解譯的精度。
  11. Utilizing the rectification technology of geometric distortion in vehicle license recognition system based on image processing and close - range photogrammetry theory is important in increasing system reliability

    依據圖像處理和近景攝影測量原理，把圖像幾何畸變校正技術應用於汽車牌照識別系統中，將會明顯提高系統的識別率。
  12. Accordingly, the origin of geometric distortion is first introduced in this paper, and through analysis, a geometric correction algorithm is presented. applying the transformation of three - dimension - projection, image series are finally converted into the same coordinate system

    論文首先介紹了圖像幾何畸變的產生，並通過分析得到幾何畸變的校正演算法，通過三維投影變換把系列航空圖像變換為同一坐標系（地面坐標系）下的幾何畸變校正圖像。
  13. But, though considerable process has been made in the last ten years, digital watermarking is still in its infancy, and much interesting work remains to be done this thesis addresses some problems in the gray - scale image digital watermarking that are summarized below : 1 ) whereas the basic theory of digital watermarking is still very poor, a digital watermarking mathematic model based on imperceptibility and robustness is presented by analysising the characteristic of digital watermarking ; 2 ) based on the model constructed above, by defining the measures of capacity and robustness of digital watermarking, an objective method for evaluating the digital watermarking is introduced and used to analysis some algorithms ; 3 ) whereas geometric distortion always influences the restoration of watermark, we advocate to enhance the robustness against geometric distortion by restoring the image which has been distorted by geometric transformation, and a method is designed for estimating the parameters of geometric transformation ; 4 ) based on the conclusion discussed above, and combined with the masking effects of hvs, a novel public meaningful gray - scale image digital watermarking is designed by analysising the characteristics of image gray - scale interpolation and haar wavelet transformation. the experimental results show that the method is indeed powerful ; 5 ) whereas many image digital watermarking schemes, which embed watermark by modifying the values of pixels in spatial domain and transformed domain, are confronted with the conflict between the imperceptibility and robustness, we advocated to use some stable digital characteristics of host image as watermark and a algorithm based on hermite matrix is designed

    本文重點對灰度圖象數字水印技術進行研究，主要工作如下： 1 ）鑒于目前數字水印的理論研究比較薄弱的現狀，本文通過分析數字水印的特點，建立了一個數字水印的數學模型，為進一步研究數字水印打下了基礎； 2 ）根據以上建立的模型，通過引入容量和穩健度的概念為數字水印提供了一個客觀評價方法，並對一些數字水印演算法進行了分析； 3 ）為增強數字水印抵抗幾何攻擊的能力，研究了受幾何攻擊的圖象的復原問題，並給出了一個計算圖象幾何變換參數的方法； 4 ）通過分析圖象灰度插值演算法和haar小波變換的特點，結合hvs的掩蔽效應，設計了一個公開的有意義數字水印演算法，實驗結果表明本演算法具有較強的穩健性； 5 ）目前許多水印演算法都是通過在空域或頻域修改象素值的方法嵌入水印的，這種方法面臨著透明性和穩健性的矛盾，為解決這個矛盾，本文提出以圖象的某些穩定的數字特徵為水印的觀點，並結合hermite矩陣的特點設計了相應的水印演算法，實驗結果表明該演算法具有較好的穩健性。
  14. Geometric rectification to image distortion in the vision system of robot soccer

    機器人足球視覺系統圖像畸變的幾何校正
  15. A 2 - d multinomial geometric correction quadratic model was used to correct the geometric distortion of images, and a file contents 6 parameters was used for images coordinates register. 5

    遙感圖像的幾何校正採用一個二次多項式模型實現，來消除平移、縮放、旋轉、仿射與彎曲等圖像變形；遙感圖像的坐標配準採用參數文件的方法進行。
  16. Unfortunately, most existing mesh generation algorithms are based on the cad model of tool surfaces and can not really realize full automatization of mesh generation because missing and distortion of geometric information often occur when preprocessing systems for mesh generation receive cad models from other cad system

    目前大多數基於cad模型的曲面網格生成演算法，由於cad模型在傳送過程中常產生幾何信息丟失和失真，需較多的人工干預進行模型修復，難以做到真正自動化。
  17. The research on plane measurement and homography has many other applications, such as rectifying images, registering image sequences, etc. image rectification can resume the true geometric figure of the object by removing the projective distortion from images

    平面測量以及平面單應問題的研究還有很多其他的應用，如矯正圖象的射影失真、實現旋轉圖象序列的整合等等。圖象射影失真的矯正技術較圓滿地消除了圖象的射影失真，恢復了物體的真實幾何形狀。
  18. Watermarking detecting algorithm with geometric distortion resistance

    抗幾何失真的數字水印檢測演算法
  19. Based on the distortion model in which the radial geometric distortion is considered as the chief factor, a general correcting method that is independent of interior parameters of the imaging system, is given and discussed in this paper via a detailed analysis of the factors which largely influence the accurate measurement of distortion parameters

    以徑向幾何畸變為主的非線性幾何畸變模型為基礎，通過對影響畸變參數測量精度的各種因素的分析，提出了一種不依賴于成像系統內部參數的迭代演算法。
  20. Some improvement is made in this dissertation based on compare and conclusion of existing methods and theories, such as substituting space - variant filter for range interpolation in geometric distortion correction and improving atafs, both of which are demonstrated to reduce computational burden effectively

    在現有的理論的基礎上，本文簡化了幾何校正通常所採用兩維插值，並且改進了wpfa和dda演算法，這些改進有效的提高了演算法性能。
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