本文關鍵詞：基于近景攝影測量的文物三維重建研究　出處：《西安科技大學》2013年碩士論文　論文類型：學位論文

  更多相關文章： 相機檢校 近景攝影測量 三維重建 虛擬仿真

【摘要】：在文物保護和重建過程中，構建文物的三維模型是一項基礎性工作。精確的文物數(shù)字模型能夠記錄文物的原始三維信息和紋理信息，從而為文物的修繕工作提供重要的數(shù)據(jù)和模型支持。所以，如何準確而迅速地建立文物數(shù)字表面模型成為了三維重建的關鍵問題。但對于具有不易接觸、紋理豐富且輪廓復雜特點的文物而言，用常規(guī)的方法很難辦到，甚至是不可能的。近景攝影測量技術以其較小的數(shù)據(jù)量、快捷的處理、低廉的成本以及高精度的特點在文物三維重建方面日漸表現(xiàn)出不可比擬的優(yōu)勢。本文討論了一種簡捷可行的數(shù)字近景攝影測量方法，，用非量測型普通數(shù)碼相機對文物攝影獲取其數(shù)字影像，用PhotoModeler Scanner軟件依據(jù)近景攝影測量原理生成其三維模型，并實現(xiàn)了文物模型在三維虛擬場景中的漫游和量測功能。其主要研究工作如下： （1）利用非量測型普通數(shù)碼相機獲取文物影像數(shù)據(jù)，針對普通數(shù)碼相機的相機檢校問題以及近景攝影測量中的數(shù)據(jù)采集方式進行研究。 （2）選用專業(yè)的近景攝影測量軟件PhotoModeler Scanner對文物影像數(shù)據(jù)進行處理，展開了對三維重建過程中涉及到的多基線影像匹配、相對定向、光束法平差以及切面投影三角構網(wǎng)和透視紋理映射等近景攝影測量原理的研究。 （3）選用不同形狀和尺寸的文物作為三維重建實例對象，并對其實驗結果進行對比分析研究，探索出針對不同形狀尺寸的文物在PhotoModeler Scanner平臺建模的優(yōu)化方案。 （4）完成文物三維重建后，針對文物三維模型的輸出與虛擬仿真進行研究，在Skyline平臺上實現(xiàn)了文物模型在虛擬場景的漫游和量測功能。
[Abstract]:In the process of preservation and reconstruction of cultural relics, it is a basic work to build three-dimensional model of cultural relics. Accurate digital model of cultural relics can record the original three-dimensional information and texture information of cultural relics. Therefore, how to establish the digital surface model of cultural relics accurately and quickly becomes the key problem of 3D reconstruction, but it is difficult to contact. For the cultural relics with rich texture and complicated outline, it is difficult, even impossible, to use the conventional method. The close-range photogrammetry technology can be processed quickly because of its small amount of data. The advantages of low cost and high precision in 3D reconstruction of cultural relic are more and more incomparable. This paper discusses a simple and feasible method of digital close-range photogrammetry. The digital image is obtained by using the non-measured ordinary digital camera, and the 3D model is generated by PhotoModeler Scanner software according to the principle of close-range photogrammetry. The roaming and measuring functions of the cultural relic model in the 3D virtual scene are realized. The main research work is as follows: 1) to obtain the cultural relic image data by using the non-measuring ordinary digital camera, and to study the camera calibration problem of the ordinary digital camera and the data acquisition method in the close-range photogrammetry. 2) selecting the professional close range photogrammetry software PhotoModeler Scanner to process the image data of cultural relics. The principles of close range photogrammetry, such as multi-baseline image matching, relative orientation, beam adjustment, triangulation of tangent projection and perspective texture mapping, which are involved in 3D reconstruction, are studied in this paper. The cultural relics of different shapes and sizes are selected as the object of 3D reconstruction, and the experimental results are compared and analyzed. This paper explores the optimization scheme for the modeling of cultural relics with different shapes and sizes on PhotoModeler Scanner platform. 4) after the 3D reconstruction of cultural relic is completed, the output and virtual simulation of the 3D model of cultural relic are studied, and the roaming and measuring function of the model in virtual scene is realized on Skyline platform.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：P234.1

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