【摘要】：基于點(diǎn)云的空間曲面重建技術(shù),作為反求工程的一項(xiàng)研究熱點(diǎn),在近年來已經(jīng)受到高度重視。在CAD建模與地質(zhì)建模等各個(gè)領(lǐng)域都能看到它的身影。隨著曲面重建技術(shù)在實(shí)際生活的應(yīng)用領(lǐng)域越來越廣,一大批針對(duì)各自不同應(yīng)用領(lǐng)域的曲面重建算法被相繼提出。在地質(zhì)建模的領(lǐng)域,空間點(diǎn)的曲面重建,其本質(zhì)是利用三維空間中的離散點(diǎn)按一定順序連接成曲面的問題。在當(dāng)前環(huán)境下,地質(zhì)曲面重構(gòu)主要面臨的問題在于:1.地質(zhì)結(jié)構(gòu)復(fù)雜,存在多種復(fù)雜約束;2.對(duì)于某些大型工區(qū)(如四川盆地等盆地級(jí)別工區(qū)),地質(zhì)數(shù)據(jù)量過大,普通PC機(jī)內(nèi)存受限,難以采用常規(guī)方法實(shí)現(xiàn)曲面重建。本文對(duì)多種地質(zhì)約束下大規(guī)模地質(zhì)工區(qū)的點(diǎn)云曲面重建問題進(jìn)行研究,實(shí)現(xiàn)了面向復(fù)雜約束的大規(guī)模點(diǎn)云曲面重建方法。本文具體工作如下:1.提出了一種面向復(fù)雜約束的曲面重建方法。在基于邊界約束的地質(zhì)點(diǎn)云曲面重建方法的基礎(chǔ)上,對(duì)倒轉(zhuǎn)地形約束和地勢(shì)走向約束等實(shí)際工程中出現(xiàn)的復(fù)雜約束加以研究,對(duì)倒轉(zhuǎn)地質(zhì)區(qū)域約束的構(gòu)建、倒轉(zhuǎn)區(qū)域與其他區(qū)域的拼接以及地勢(shì)走向約束的添加進(jìn)行了研究,并最終實(shí)現(xiàn)曲面重建。2.提出了一種基于地形分塊的針對(duì)大規(guī)模地震數(shù)據(jù)進(jìn)行曲面重建的方法。采用地形分塊的思想解決對(duì)大規(guī)模地震數(shù)據(jù)進(jìn)行曲面重建的問題,將無法在單臺(tái)計(jì)算機(jī)處理的大規(guī)模地震數(shù)據(jù)劃分為地形塊,并設(shè)定地形塊的調(diào)度方法,實(shí)現(xiàn)了高效、流暢的進(jìn)行大規(guī)模地震數(shù)據(jù)曲面重建的過程,并取得了比較理想的效果。3.實(shí)現(xiàn)了大規(guī)模地震數(shù)據(jù)下進(jìn)行三維地質(zhì)曲面重建的系統(tǒng)。根據(jù)本文提出的相關(guān)方法,編程實(shí)現(xiàn)了大規(guī)模地震數(shù)據(jù)三維地質(zhì)曲面重建系統(tǒng)的各個(gè)子模塊,并對(duì)不同的工區(qū)數(shù)據(jù)進(jìn)行測(cè)試,驗(yàn)證了系統(tǒng)效果的正確性以及系統(tǒng)的效率。通過面向復(fù)雜約束的大規(guī)模點(diǎn)云曲面重建方法的研究以及相關(guān)系統(tǒng)的設(shè)計(jì)實(shí)現(xiàn),證明了該方法可以適應(yīng)多種復(fù)雜約束情況以及大規(guī)模的地質(zhì)工區(qū)地震數(shù)據(jù)情況,為點(diǎn)云曲面重建的技術(shù),以及三維地質(zhì)建模技術(shù)提供了新的思路。
[Abstract]:As a research hotspot in reverse engineering, point cloud based space surface reconstruction technology has been paid more and more attention in recent years. It can be seen in CAD modeling, geological modeling and other fields. With more and more applications of surface reconstruction technology in real life, a large number of surface reconstruction algorithms for different applications have been proposed one after another. In the field of geological modeling, the essence of surface reconstruction of spatial points is the problem of making use of discrete points in three-dimensional space to form surfaces in a certain order. In the current environment, the main problem of geological surface reconstruction is 1: 1. The geological structure is complex and there are many kinds of complex constraints. For some large working areas (such as Sichuan Basin), the geological data is too large and the memory of PC is limited, so it is difficult to use the conventional method to reconstruct curved surface. In this paper, the problem of point cloud surface reconstruction in large scale geological area under various geological constraints is studied, and the method of large scale point cloud surface reconstruction for complex constraints is realized. The specific work of this paper is as follows: 1. A surface reconstruction method for complex constraints is proposed. Based on the method of surface reconstruction of geological point cloud based on boundary constraints, the complex constraints such as inverted terrain constraints and terrain strike constraints are studied, and the constraints of inverted geological regions are constructed. The conjunctions between inverted region and other regions and the addition of terrain orientation constraints are studied, and the surface reconstruction. 2. 2 is finally realized. A method of surface reconstruction for large scale seismic data based on terrain partitioning is proposed. Using the idea of terrain block to solve the problem of surface reconstruction of large-scale seismic data, the large scale seismic data which can not be processed in a single computer is divided into terrain blocks, and the scheduling method of terrain blocks is set up to achieve high efficiency. The process of surface reconstruction of large scale seismic data is carried out smoothly, and the ideal effect is obtained. 3. The system of 3D surface reconstruction based on large-scale seismic data is realized. According to the related methods proposed in this paper, each sub-module of 3D geological surface reconstruction system of large-scale seismic data is programmed and tested to verify the correctness of the system effect and the efficiency of the system. Based on the research of large-scale point cloud surface reconstruction method for complex constraints and the design and implementation of related systems, it is proved that this method can adapt to various complex constraints and large-scale seismic data in geological areas. It provides a new idea for point cloud surface reconstruction and 3D geological modeling.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P631.4;P628

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本文編號(hào)：2127959