本文關(guān)鍵詞： 虛擬現(xiàn)實(shí) 基于圖像的繪制 TIP 摳圖算法 非真實(shí)感繪制　出處：《云南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：虛擬現(xiàn)實(shí)技術(shù)是近年來國內(nèi)外關(guān)注的熱點(diǎn)之一。虛擬現(xiàn)實(shí)技術(shù)是指利用計(jì)算機(jī)強(qiáng)大的運(yùn)算能力構(gòu)建出一個(gè)虛擬的三維場(chǎng)景,同時(shí)利用一定的傳感器技術(shù)使得進(jìn)入這個(gè)場(chǎng)景的觀察者可以用很自然的方式和這個(gè)三維場(chǎng)景進(jìn)行交互。基于圖像的繪制是實(shí)現(xiàn)虛擬現(xiàn)實(shí)的方法之一,基于圖像的繪制要求輸入一組場(chǎng)景圖像,并利用這組圖像構(gòu)建出場(chǎng)景的表示模型�；趫D像的繪制技術(shù)利用相對(duì)簡(jiǎn)單的輸入圖像組就可以搭建出一個(gè)虛擬場(chǎng)景,大大減少了技術(shù)的實(shí)現(xiàn)難度。畫中游(Tour Into the Picture,TIP)技術(shù)利用基于圖像繪制的方法,以透視原理為基礎(chǔ)針對(duì)單幅圖像,通過設(shè)定圖像的滅點(diǎn)或滅點(diǎn)線,恢復(fù)場(chǎng)景的簡(jiǎn)單模型。畫中游技術(shù)可以快速的用單幅圖像實(shí)現(xiàn)三維漫游。 全景漫游技術(shù)屬于虛擬現(xiàn)實(shí)的范疇,這項(xiàng)技術(shù)可以幫助人們迅速的瀏覽從未去過的場(chǎng)景,并能給使用者提供360度的全方位瀏覽角度。全景漫游技術(shù)使用基于圖像繪制的方法,與傳統(tǒng)的三維建模技術(shù)相比,全景漫游技術(shù)實(shí)現(xiàn)簡(jiǎn)單,系統(tǒng)要求低。它所具有的這些優(yōu)點(diǎn)使得它現(xiàn)在得到了廣泛應(yīng)用,例如各大公司的街景服務(wù),房地產(chǎn)開發(fā)商的樓盤預(yù)覽以及旅游景點(diǎn)的風(fēng)景預(yù)覽等。 本文對(duì)全景漫游技術(shù)做了以下兩項(xiàng)新工作： 第一,提出了一種新的全景漫游建模方案。通常的全景漫游技術(shù)僅僅提供了固定視點(diǎn)的瀏覽方式,它無法讓使用者體驗(yàn)到場(chǎng)景的深度信息。雖然可以使用三維重建技術(shù)來精細(xì)地恢復(fù)場(chǎng)景的深度信息,但是這些技術(shù)都非常復(fù)雜,且運(yùn)行效率低下。因此,本文結(jié)合了基于圖像繪制的TIP(Tour Into the Picture)技術(shù),使用一種新的“類蜘蛛網(wǎng)”建模方案,快速重建球面全景圖的場(chǎng)景三維模型來恢復(fù)場(chǎng)景的深度信息,以提供更好的漫游體驗(yàn)。 第二,提出了一個(gè)完整的TIP全景漫游實(shí)現(xiàn)方案。一個(gè)完整的TIP全景漫游實(shí)現(xiàn)方案包括三個(gè)主要流程,前期工作主要是利用摳圖算法提取全景圖像的前景和背景,中期工作主要是運(yùn)用“類蜘蛛網(wǎng)”建模方法進(jìn)行場(chǎng)景建模,后期工作主要是為場(chǎng)景添加一些其他的非真實(shí)感繪制效果。這一完整的實(shí)現(xiàn)框架體現(xiàn)了全景漫游所需要的主要技術(shù)。
[Abstract]:Virtual reality technology is one of the hot spots at home and abroad in recent years. Virtual reality technology is to make use of the powerful computing power of computer to construct a virtual 3D scene. At the same time, using certain sensor technology, the observer entering the scene can interact with the 3D scene in a very natural way. Image-based rendering is one of the methods to realize virtual reality. Image rendering requires the input of a set of scene images and the use of this set of images to build a scene representation model. Based on the image rendering technology can build a virtual scene using relatively simple input image groups. It greatly reduces the difficulty of the realization of the technology. The technique of Tour Into the PictureTIPs uses the method based on image rendering. Based on the perspective principle, a simple model of the scene can be restored by setting the vanishing point or vanishing line of the image. Panoramic roaming technology belongs to the category of virtual reality, this technology can help people quickly browse the scene that has never been before. The panoramic roaming technology is based on the method of image rendering. Compared with the traditional 3D modeling technology, the panoramic roaming technology is easy to realize. System requirements are low. These advantages make it widely used now, such as street view services of major companies, real estate developers' real estate previews and scenic previews of tourist attractions. In this paper, we do the following two new works on panoramic roaming technology: Firstly, a new panoramic roaming modeling scheme is proposed. It can not let the user experience the depth information of the scene. Although 3D reconstruction technology can be used to restore the depth information of the scene, these technologies are very complex and inefficient. This paper combines TIP(Tour Into the Picture technology based on image rendering, and uses a new "spider web-like" modeling scheme. The 3D model of spherical panorama is reconstructed quickly to restore the depth information of the scene to provide a better roaming experience. Secondly, a complete TIP panoramic roaming scheme is proposed. A complete TIP panoramic roaming scheme includes three main processes. The previous work is mainly using matting algorithm to extract the foreground and background of panoramic image, and the middle stage work is mainly using the "spider web" modeling method to model the scene. The later work is mainly to add some other non-realistic rendering effects to the scene. This complete implementation framework embodies the main technology required for panoramic roaming.
【學(xué)位授予單位】：云南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP391.41;TP391.9

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