3D reconstruction is one of the most challenging problems in computer vision. This project uses CAD model to increase the accuracy,robustness and speed of 3D reconstruction and five different works are conducted: 1 research on space curve 3D reconstruction method based on high curvature point nad turning point; 2 free-form curve 3D reconstruction based on B-spline and BURBS; 3 Active surface affine reconstruction based on single frame; 4 Matching and reconstruction of 3D sparse points; Data fitting method based on the iteration of nearest point.

三維重建是計(jì)算機(jī)視覺中公認(rèn)的難題日韩插插碰碰，本項(xiàng)目使用CAD模型來提高三維重建的精度六区七区黄片、穩(wěn)健性和速度的思路，圍繞著空間曲線和曲面的三維重建和匹配開展了以下五個方面的研究：1）基于高曲率點(diǎn)和拐點(diǎn)分割的空間曲線三維重建方法研究在线观看免费的成年网站；2）基于B樣條和NURBS表示的空間自由曲線三維重建方法研究久久久久久无码精品；3）基于單幀圖像的有源曲面仿射重建；4）三維離散數(shù)據(jù)的匹配與重建很黄很色视频；5）基于迭代最近點(diǎn)的數(shù)據(jù)擬合方法久操中文字幕视频在线观看。

The raw data was processed by using axial, coronal and double oblique multi-planar reformation; Images obtained were graded in terms of quality with a 5-point scale(5=excellent, 4=good, 3=fair, 2=poor, and 1=nondiagnostic). In grading image quality at axial MPR, The radiologic specialists focused on the subarcuate fossa, tendon of tensor tympani, facial recess, vestibular aqueduct and pyramidal eminence, In grading image quality at coronal MPR, attention was given to the scute, crista transversa, fenestra cochleae, lateral malleal ligament and snake eyes signature of cranial nerve, In the grading of the image quality at double oblique MPR, the radiologic specialists concentrated on the malleus, incus, stirrup bone, upper bony semicircular and aquaeductus fallopii, and then to implement statistical analysis. In order to choose the minimum tube current values and the maximum pitch that can satisfy the diagnosis request, image quality of axial, coronal and double oblique reformation images was compared with different tube current groups. 15 ears of volunteers were used to test the validity with the scanning parameter. Subsequently noise, MTF and dose length product were measured by phantoms in different tube current and pitch, the parameters obtained were compared and taken into statistics analysis.

掃描模式使用臨床常用的顳骨螺旋掃描方式：管電壓120 kV，準(zhǔn)直寬度20×0.6 mm91jiuse在线观看，視野200 mm26uuu在线，重建矩陣512×512，旋轉(zhuǎn)時(shí)間1 s/r亚洲乱伦熟妇，重建層厚0.6 mm好爽好舒服要高潮了视频在线观看，重建間隔0.3 mm，分別改變管電流(380国内久久久久久久久久精品影院、300免费三级片毛片黄片、200、160免费一级A毛片在线播放视频、120和80 mA)和螺距(0.8男人的天堂性爱视频、1.0和1.2)進(jìn)行掃描和重建，然后對顳骨進(jìn)行橫斷面www、AⅤ毛片COm、冠狀面和雙斜面多平面重組超碰超碰超碰人人人操，于重組后的橫斷層面圖像上選取弓形下窩、鼓膜張肌腱国产原创资源网站、面神經(jīng)隱窩欧美性交免费播放、前庭導(dǎo)水管和錐隆起5個解剖結(jié)構(gòu)免费三级黄片视频，冠狀面重組圖像上選取盾板、橫嵴成人学生妹免费视频、蝸窗AV综com、面神經(jīng)的蛇眼征和錘骨外側(cè)韌帶5個解剖結(jié)構(gòu)，雙斜面重組圖像上選取錘骨精品国黄色视频、砧骨欧美情欲片在线、鐙骨、上骨半規(guī)管和面神經(jīng)管5個解剖結(jié)構(gòu)亚洲视频同事，在雙盲的情況下由放射學(xué)專家分別對各管電流和螺距下掃描的重組圖像進(jìn)行評分精品网站视频地址网站，隨后進(jìn)行統(tǒng)計(jì)學(xué)處理，從中篩選出滿足診斷要求的最低管電流值和最大的螺距九九九这里只有精品视频，分別采用患者25例(15耳)用該管電流值和螺距驗(yàn)證其可行性99黄色一级视频；然后利用模體分別測試各管電流和螺距下的圖像的空間分辨率、噪聲及其劑量長度積欧美在线特级黄片，并對測試所得參數(shù)數(shù)值進(jìn)行比較和統(tǒng)計(jì)學(xué)處理91精品欧一区二区三区综合。

After certifying the irreality of ideal filtering function, we can get a better filter selecting a proper window function. Comparing two actual filters, we designate a good"Panama hat"filtering function. Meanwhile, an effectively linear interpolating function is introduced to raise the image reconstruction quality. Describing its realizing steps on the micro-computer briefly, we reconstructed some images from the anlogue projections of some models. The number of projection views is 180, 100 same interval parallel lines per view; the size of reconstructed images is 64×64 pixels with 64 gray levels; the reconstructing speeds are 40" on PC-386 and 12"on PC-486, respectively; each pixel is 0.31mm.

在證明了理想濾波器的不可實(shí)現(xiàn)性之后人人舔人人干人人操，得知通過選擇適當(dāng)?shù)拇昂瘮?shù)可獲得很好的濾波函數(shù)午夜激情亚洲专区，經(jīng)過兩個實(shí)際濾波器的效果對比，我們選取了較好的"巴拿馬帽"形濾波函數(shù)玖玖爱在线视频精品日韩，同時(shí)也介紹了一個有效的提高重建質(zhì)量的線性內(nèi)插函數(shù)肏逼免费视频，概要地?cái)⑹隽似叫猩涫鴪D象重建的計(jì)算機(jī)具體實(shí)現(xiàn)步驟后，對幾個物體的模擬投影數(shù)據(jù)進(jìn)行了重建：投影角為180°理伦无码在线观看，每視角下有100個平行投影數(shù)據(jù)點(diǎn)黄色一及亚洲，在386微機(jī)上重建尺寸為64×64，時(shí)間約為40秒欧美三级片免费久久；在486/33MHz微機(jī)上只用了12秒日本三级性爱视频，圖象的象點(diǎn)精度是0.31mm。

An iterative factorization method based on linear subspace for projective reconstruction is presented in the paper. It relies on the facts that the rows in the matrix including all the image points span the same linear subspace as the rows in the matrix including space points and the fact that any basis of the subspace can be regarded as projective reconstruction. The projective reconstruction and the depth factors are obtained based on linear iteration.

摘要該文提出了一種基于子空間線性迭代的射影重建方法欧美日韩精品一区二区性色av，該方法利用所有的圖像序列構(gòu)成的行向量生成的線性子空間之和與射影重建結(jié)構(gòu)點(diǎn)構(gòu)成的行向量生成的子空間是同一線性子空間及在該子空間中任何一個基底都可以作為射影重建的特性人人操人人摸2018，線性迭代地求取射影重建及圖像深度因子。

The reconstruction problem is ill-posed, so two optimal criterions, the least module and the smoothness criterion base on Tikhonov regularization technique, are introduced into reconstruction algorithm. Many regularization parameters choice strategies are investigated, and the TPA(Two—Parameter Algorithm) strategy which is based on the Morozov discrepancy principles, is implemented in two regularization reconstruction algorithms.Numerical experiment results show that the nonnegative and smoothness constraint condition can overcome the difficulty of iteration semiconvergent, preconditioned technique can improve convergence rate and reconstruction accuracy, smoothness regularization criterion can meliorate ill-posed problem of reconstruction and enhance iteration stability, and the TPA is an effective strategy of regularization parameters choice.

數(shù)值試驗(yàn)表明：在共軛梯度法中引入非負(fù)約束和光滑約束改善了迭代的"半收斂"性欧美色精品视频在线观看9，非負(fù)約束保證了解的非負(fù)性免费的精油按摩毛片，光滑約束抑制了重建解的振蕩現(xiàn)象，約束算法的重建精度與無約束算法相比大幅度提高天天操天天拍；在約束共軛梯度重建算法中引入預(yù)優(yōu)技術(shù)毛片在线视频网站，可以加快算法的收斂速度，提高迭代的穩(wěn)定性和重建精度欧美三级片手机在线看；引入光滑準(zhǔn)則的正則化技術(shù)可以有效改善圖像重建問題的不適定性十八禁网站免费观看，加快迭代的收斂速度无码高清免费国区av在线不卡一卡，提高迭代的穩(wěn)定性和圖像重建質(zhì)量，計(jì)算正則參數(shù)的TPA算法在閃光照相圖像重建中是有效的如何看毛片。

The advantages of this new method are:(1) The field conductivity distribution function is fitter the actual condition than tradition methods:(2) On the condition of triangle elements cut of field, making the calculation speed increase in large degree than tradition methods.

與單元電導(dǎo)率重建算法相比亚洲精品中文涩，節(jié)點(diǎn)電導(dǎo)率重建算法的優(yōu)點(diǎn)有：(1)使場域電導(dǎo)率分布函數(shù)更符合實(shí)際情況，克服了傳統(tǒng)算法中對電導(dǎo)率作離散化處理的缺陷自拍视频网址观看；(2)當(dāng)場域采用三角形單元剖分方式時(shí)九色国产，在場域的剖分密度保持不變的情況下，可以大大提高重建計(jì)算的速度第一页在线；(3)在場域采用三角形單元剖分方式時(shí)美国黄色肥女一级电影，場域的剖分密度可以比以前加大一倍，在不降低重建計(jì)算速度的前提下黄色一级免费播放，可以改善重建計(jì)算的精度黄色片色网站；(4)由于重建的是所有節(jié)點(diǎn)的電導(dǎo)率，避免了先前單元電導(dǎo)率重建圖像中"階梯"狀邊緣和"鋸齒"狀邊緣的出現(xiàn)大黑吊性交，明顯地改善了圖像的視覺效果久久福利网。

It shows that the lensless Fourier transform digital hologram can be reconstructed at any distance by Fresnel transform algorithm. For convolution algorithm,the whole reconstructed image with high resolution can be acquired in an optimal reconstruction range or a small area around it.

結(jié)果表明：利用菲涅耳變換算法對離軸無透鏡傅里葉變換數(shù)字全息進(jìn)行重建時(shí)，無重建距離的限制www.久久@.Com；采用卷積重建法只能在最佳再現(xiàn)距離附近一個非常小的范圍內(nèi)才能獲得高分辨率再現(xiàn)像欧美三级免费A片；而采用角譜重建法在略小于最佳再現(xiàn)距離及大于最佳再現(xiàn)距離較大范圍內(nèi)重建，均能獲得高分辨率的再現(xiàn)像国内免费久久久久久久久久10。

Two construction methods for fewer views from limited range—ART and SART are studied, and simulated a physical fields views whose variation of deflection is equal to double-Gauss function, and then reconstructed it, and still analyzed the accuracy of the reconstruction methods.After study and analysis on the theory of ART and SART, and after analysis the properties resulted from their theory root cause, A modified simultaneous algebraic reconstruction method is presented, which is based on ART, this method takes into account both the pixel itself and the pixels close by it which are crossed by the same ray.

論文研究了兩種有限投影方向的非軸對稱場的CT重建算法——代數(shù)重建法和聯(lián)合代數(shù)重建法www.亚洲com.第四页，并用VC++程序模擬實(shí)現(xiàn)了折射率分布為雙高斯函數(shù)的場的正向投影及重建過程，并對所用算法的重建精度進(jìn)行了分析久久久九九九一精品。

The reconstruction problem is ill-posed, so two optimal criterions, the least module and the smoothness criterion base on Tikhonov regularization technique, are introduced into reconstruction algorithm. Many regularization parameters choice strategies are investigated, and the TPA(Two—Parameter Algorithm) strategy which is based on the Morozov discrepancy principles, is implemented in two regularization reconstruction algorithms.Numerical experiment results show that the nonnegative and smoothness constraint condition can overcome the difficulty of iteration semiconvergent, preconditioned technique can improve convergence rate and reconstruction accuracy, smoothness regularization criterion can meliorate ill-posed problem of reconstruction and enhance iteration stability, and the TPA is an effective strategy of regularization parameters choice.

數(shù)值試驗(yàn)表明：在共軛梯度法中引入非負(fù)約束和光滑約束改善了迭代的&半收斂&性免费A片男人的天堂久久精品免费，非負(fù)約束保證了解的非負(fù)性，光滑約束抑制了重建解的振蕩現(xiàn)象99视频免费看，約束算法的重建精度與無約束算法相比大幅度提高一毛不卡毛片免费网址；在約束共軛梯度重建算法中引入預(yù)優(yōu)技術(shù)，可以加快算法的收斂速度国产三级黄片视频，提高迭代的穩(wěn)定性和重建精度亚洲色婷婷啪啪一区二区；引入光滑準(zhǔn)則的正則化技術(shù)可以有效改善圖像重建問題的不適定性，加快迭代的收斂速度农民工出租屋嫖妓，提高迭代的穩(wěn)定性和圖像重建質(zhì)量人人干人人色人人摸人人操，計(jì)算正則參數(shù)的TPA算法在閃光照相圖像重建中是有效的。

On the basement of conventional direct fan-beam reconstruction, this paper gives a newly improved algorithm-"fast filtering-backprojection". This method utilizes the symmetrical circle geometry to sample projection data, and reconstructs image on the Polarcoordinate firstly, then translates this reconstructed image onto the cartesian coordinate system with two interpolating operations so that the computer can show the result image on the VGA screen. This algorithm rebates the calculating backprojection greatly, and shortens a few times of reconstructing time than same kinds of means. With the size of image enlarging, the reconstructing time abates with 2 exponent times. In addition, according to the idea of parallel-beam, we rearrange the fan-beams and reconstruct image using parallel-beam method fastly. The rearranging constraint condition is given here.

本文首先在傳統(tǒng)的扇束直接重建方法的基礎(chǔ)上国产又硬又黄又粗视频，提出了一個改進(jìn)的快速濾波反投影重建算法性爱视频网站九九性爱，它利用旋轉(zhuǎn)采集投影數(shù)據(jù)的圓周對稱的幾何關(guān)系，先在極坐標(biāo)系統(tǒng)內(nèi)進(jìn)行圖象的重建精品国内在视频线免费，然后通過兩次內(nèi)插運(yùn)算再將圖象轉(zhuǎn)換到計(jì)算機(jī)顯示方式下的笛卡爾坐標(biāo)系中去japanese无码精品专区，該方法將以往的直接重建方法中的反投影時(shí)所需的運(yùn)算大大降低日韩欧美性片，并將重建時(shí)間比同類方法縮短了幾倍，而且隨著重建圖象的尺寸的增大久久免费精品视频，重建時(shí)間以2的指數(shù)次方倍相對縮短久久久666特级毛片，并獲得了較好質(zhì)量的重建圖象；另外wwww麻豆视频，又根據(jù)平行束投影重建圖象的思想黄色网站1，對扇形射束進(jìn)行了重排，然后利用平行束重建圖象的方法進(jìn)行扇束的重建久久AV草，并推導(dǎo)了&扇束重排重建圖象&方法的約束條件www。操逼。com。

Rebuild Curve：重建曲線

發(fā)現(xiàn)在重建曲線(Rebuild Curve)時(shí),選擇Rebuild Type為 Curvature,Use tolerance選Local 局部,然后設(shè)定Positional Tolerance的值可以影響重建曲線上的CV點(diǎn)分布,該值越小重建后CV點(diǎn)分布的越密,請問老師們,這個值是什么意思?

minimal rebuild：最少重建 最少重建

minidump 小型傾印 小型傾印 | minimal rebuild 最少重建 最少重建 | minimeter 毫米 公厘

minimal rebuild：最少重建 最小重建

minidump 小型傾印 小型轉(zhuǎn)儲 | minimal rebuild 最少重建 最小重建 | minimeter 厘米 厘米

reconstruct：重建

ServeRAID控制器可以重建(reconstruct)RAID級別為1和5的邏輯磁盤中的數(shù)據(jù),但是不能重建RAID級別為0的邏輯磁盤中的數(shù)據(jù). 在對硬盤重建(rebuild)的過程中,為了保證數(shù)據(jù)的完整性,ServeRAID控制器會把RAID級別為0的邏輯磁盤的狀態(tài)設(shè)為"blocked".

reconstruct program：重建程式

"資料重建","reconstitution of data" | "重建程式","reconstruct program" | "重建能力","reconstructability"

post-quake reconstruction：震后重建

重建:rebuild | 震后重建:post-quake reconstruction | 盡快進(jìn)行重建工作:carry out reconstruction as soon as possible

redevelopment order：重建令

redevelopment estate 列入重建計(jì)劃的屋 | redevelopment order 重建令 | redevelopment potential 重建潛力

redevelopment order：重建令;重新發(fā)展令

Redevelopment 重新發(fā)展;重建 | Redevelopment order 重建令;重新發(fā)展令 | Redevelopment project 重建計(jì)劃

reestablishment speed：重建速度

群落重建:community reestablishment | 重建速度:reestablishment speed | 連貫重建:coherence reestablishment

ecological restoration：生態(tài)重建

"生態(tài)重建(ecological restoration)是自上世紀(jì)80年代以來生態(tài)學(xué)領(lǐng)域最活躍的關(guān)鍵行動之一. 尤其是進(jìn)入21世紀(jì),由于國際社會和學(xué)界對地球生態(tài)與環(huán)境退化和健康的關(guān)注,使生態(tài)重建受到極大重視,我國政府對生態(tài)建設(shè)有極大的投入,生態(tài)建設(shè)的學(xué)術(shù)用語就是生態(tài)重建.