【摘要】：三維顯示技術(shù)是未來顯示技術(shù)發(fā)展的重要方向之一,它通過讓觀察者獲取到二維顯示技術(shù)所不具有的深度信息,從而產(chǎn)生更真實的視覺感受。1996年來自美國的學者M. Levoy和P. Hanrahan提出了三維場景的光場繪制方法,催生了基于光場重構(gòu)的三維顯示技術(shù)蓬勃發(fā)展。其原理是通過精確再現(xiàn)三維物體的空間光場分布來實現(xiàn)真實空間三維顯示,具備了裸眼、全景、觀察者數(shù)目不受限制等諸多優(yōu)點,是一種優(yōu)秀的三維顯示技術(shù)。本文依據(jù)計算機圖形學和光場重構(gòu)的相關理論,詳盡分析了圓柱形顯示空間光場重構(gòu)方案,論述了基于多投影式的光場重構(gòu)技術(shù)在不同空間位置的圖像映射關系。并以此為基礎,構(gòu)建了一套大尺度真三維顯示系統(tǒng),介紹了系統(tǒng)的實現(xiàn)方案及硬件參數(shù),最后展示了系統(tǒng)的實際顯示效果。隨著三維顯示技術(shù)越發(fā)成熟,提高成像質(zhì)量將會是下一步研究的主題。本文針對大尺度真三維顯示系統(tǒng)實現(xiàn)過程中存在的亮度均勻性問題和多投影顯示系統(tǒng)的校準方法進行了深入的討論和研究。系統(tǒng)顯示區(qū)域亮度均勻性問題主要是由多投影陣列排布引起的,本文提出了通過增加投影儀填補由于系統(tǒng)排布所造成的顯示區(qū)域暗區(qū),再結(jié)合前人所研究的集成光場三維顯示的亮度校正方法,可以有效的提高系統(tǒng)的亮度均勻性。多投影顯示系統(tǒng)中存在的手動校準難度大、校準精度低等問題,結(jié)合傳統(tǒng)二維圖像校準方法,本文創(chuàng)新性的提出了一種可適用于光場重構(gòu)等投影式三維顯示系統(tǒng)的自動圖像校準方法。該方法基于光場重構(gòu)原理,通過CCD相機拍攝,計算獲取一系列空間圖像映射關系,實現(xiàn)顯示系統(tǒng)的圖像自動校正功能。該方法廣泛適用于基于多投影式的三維顯示系統(tǒng),是一種有效提高三維顯示效果的新方案。論文的最后,對研究生期間工作進行系統(tǒng)的總結(jié),并展望了今后的工作。
[Abstract]:3D display technology is one of the important directions of the future display technology. It allows the observer to obtain depth information that the two-dimensional display technology does not have. In 1996, American scholars M. Levoy and P. Hanrahan proposed a method of 3D scene rendering, which gave birth to the vigorous development of 3D display technology based on light field reconstruction. The principle is to accurately reproduce the spatial field distribution of three-dimensional objects to realize the three-dimensional display of real space, with the naked eye, panoramic, unlimited number of observers and many other advantages, it is an excellent three-dimensional display technology. Based on the theory of computer graphics and light field reconstruction, this paper analyzes the reconstruction scheme of cylindrical display space light field in detail, and discusses the image mapping relationship of light field reconstruction technology based on multi-projection in different space. On the basis of this, a large scale true 3D display system is constructed, and the realization scheme and hardware parameters of the system are introduced. Finally, the actual display effect of the system is shown. As 3D display technology becomes more and more mature, improving imaging quality will be the next research topic. In this paper, the problem of luminance uniformity in the realization of large scale true 3D display system and the calibration method of multi-projection display system are discussed and studied in depth. The luminance uniformity of the system display area is mainly caused by the arrangement of multi-projection arrays. In this paper, we propose to fill the dark area of the display area caused by the arrangement of the system by adding projectors. Combined with the luminance correction method of integrated light field 3D display, the brightness uniformity of the system can be improved effectively. In the multi-projection display system, the manual calibration is difficult and the calibration accuracy is low, combined with the traditional two-dimensional image calibration method, In this paper, an automatic image calibration method is proposed, which can be applied to the reconstruction of light field and the projection 3D display system. Based on the principle of light field reconstruction, a series of spatial image mapping relationships are calculated and acquired by CCD camera, and the automatic image correction function of the display system is realized. This method is widely used in 3D display system based on multi-projection and is a new scheme to improve the effect of 3D display. At the end of the thesis, the work of postgraduates is summarized systematically, and the future work is prospected.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TP391.41;TN27

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本文編號：2179198