基于WebGL的三维全景数字展览关键技术研究

发布时间：2018-06-06 15:08

本文选题：WebGL + 全景漫游　；参考：《杭州电子科技大学》2017年硕士论文

【摘要】：网上展览馆是解决实体展览馆成本高、准备工作复杂、维护费用大等问题的不二之选,也被越来越多的实体展馆选作预热展览的方式。随着展览数字化的趋势,国内外学术领域也已对网上展览技术进行了一系列的研究,但是主要都针对于有实体展馆的情况,而且存在运行需要安装插件、切换场景视觉不连续、展品无法修改/替换、真实感不足等无法满足展览需求的问题。本文针对目前数字展览研究现状所存在的不足,结合HTML5、JavaScript语言,选择了新兴开源高效的三维渲染引擎Three.js作为开发平台,将研究重点放在三维全景数字展览场景搭建与数字展览互动体验方面,系统分析了全景网上展览的一系列方法,并最终实现了基于WebGL的三维全景数字展览平台。本文的主要工作如下:1、针对采用LOD技术分割全景图而成层级区块拼合产生明显缝隙的问题,提出一种边界融合方法使色彩均衡过渡。2、设计实现了全景漫游整体自动生成功能:包括顶视图渲染视点的精确选取方法、基于顶点的区域障碍判断方法,以完成全景漫游的整体自动生成,使得数字展览的可持续维护更加简便。3、针对已搭建完成的全景场景进行展览内容替换、增加展台模型等局部修改工作的需求,提出一种贴片式半自动全景漫游局部修改方法,并为确定修改位置提出了图像匹配定位修改位置方法。4、深入研究并实现了视频与全景无缝对接方法,提出视频与全景图像匹配方法、视频到全景对接旋转角的求解算法,使得全景漫游切换更加流畅。5、在全景图像加载方面,本文使用射线相交判断与分块加载处理的方法加载全景图像,使三维全景数字互动展览平台浏览更加顺畅。
[Abstract]:The online exhibition hall is the solution to the problems of high cost, complex preparation work and high maintenance cost. It is also used by more and more physical exhibition halls as the way to preheat the exhibition. With the trend of digitalization of exhibition, domestic and foreign academic field has also carried out a series of research on online exhibition technology, but it is mainly aimed at the situation of physical exhibition hall, and there is a need to install plug-in operation, and the scene vision is not continuous. Exhibits can not be modified / replaced, lack of realism and other problems can not meet the exhibition needs. In this paper, according to the shortcomings of the current research situation of digital exhibition, combined with the HTML 5 / JavaScript language, we choose Three.js, a new open source and efficient 3D rendering engine, as the development platform. Focusing on the interactive experience between 3D panoramic digital exhibition scene and digital exhibition, this paper systematically analyzes a series of methods of panoramic online exhibition, and finally realizes the 3D panoramic digital exhibition platform based on WebGL. The main work of this paper is as follows: 1, aiming at the problem of using LOD technology to divide panoramic images into hierarchical blocks and produce obvious gaps. In this paper, a boundary fusion method is proposed to make color balance transition. 2. The function of panoramic roaming is designed and realized, which includes the accurate selection of view point of top view rendering, the method of judging regional obstacle based on vertex. In order to complete the overall automatic generation of panoramic roaming, make the sustainable maintenance of digital exhibition easier. 3, for the completed panoramic scene of the exhibition content replacement, increase the needs of local modification work, such as stand model, etc. In this paper, a local modification method of semi-automatic panoramic roaming is proposed. In order to determine the modified location, the image matching location modification method .4 is put forward, and the seamless docking method between video and panorama is deeply studied and realized. The matching method between video and panoramic image is proposed, and the algorithm for solving rotation angle of video to panoramic docking is proposed, which makes the panoramic roaming switch more smooth. 5. In the aspect of panoramic image loading, In this paper, the method of ray-intersecting judgment and block loading is used to load panoramic images, which makes the browsing of 3D panoramic digital interactive exhibition platform more smooth.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP391.41

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