基于TIP的球面全景图漫游系统的研究和实现

发布时间：2018-01-22 00:39

本文关键词： 虚拟现实基于图像的绘制 TIP 抠图算法非真实感绘制　出处：《云南大学》2014年硕士论文　论文类型：学位论文

【摘要】：虚拟现实技术是近年来国内外关注的热点之一。虚拟现实技术是指利用计算机强大的运算能力构建出一个虚拟的三维场景,同时利用一定的传感器技术使得进入这个场景的观察者可以用很自然的方式和这个三维场景进行交互。基于图像的绘制是实现虚拟现实的方法之一,基于图像的绘制要求输入一组场景图像,并利用这组图像构建出场景的表示模型。基于图像的绘制技术利用相对简单的输入图像组就可以搭建出一个虚拟场景,大大减少了技术的实现难度。画中游(Tour Into the Picture,TIP)技术利用基于图像绘制的方法,以透视原理为基础针对单幅图像,通过设定图像的灭点或灭点线,恢复场景的简单模型。画中游技术可以快速的用单幅图像实现三维漫游。全景漫游技术属于虚拟现实的范畴,这项技术可以帮助人们迅速的浏览从未去过的场景,并能给使用者提供360度的全方位浏览角度。全景漫游技术使用基于图像绘制的方法,与传统的三维建模技术相比,全景漫游技术实现简单,系统要求低。它所具有的这些优点使得它现在得到了广泛应用,例如各大公司的街景服务,房地产开发商的楼盘预览以及旅游景点的风景预览等。本文对全景漫游技术做了以下两项新工作：第一,提出了一种新的全景漫游建模方案。通常的全景漫游技术仅仅提供了固定视点的浏览方式,它无法让使用者体验到场景的深度信息。虽然可以使用三维重建技术来精细地恢复场景的深度信息,但是这些技术都非常复杂,且运行效率低下。因此,本文结合了基于图像绘制的TIP(Tour Into the Picture)技术,使用一种新的“类蜘蛛网”建模方案,快速重建球面全景图的场景三维模型来恢复场景的深度信息,以提供更好的漫游体验。第二,提出了一个完整的TIP全景漫游实现方案。一个完整的TIP全景漫游实现方案包括三个主要流程,前期工作主要是利用抠图算法提取全景图像的前景和背景,中期工作主要是运用“类蜘蛛网”建模方法进行场景建模,后期工作主要是为场景添加一些其他的非真实感绘制效果。这一完整的实现框架体现了全景漫游所需要的主要技术。
[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.
【学位授予单位】：云南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP391.41;TP391.9

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