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摘要：针对实景虚拟漫游技术是基于全景图像的虚拟现实交互，通过虚拟仿真与视觉技术的结合延伸来构建虚拟现实系统，对真实场景进行全方位互动展示，为用户提供各种实时感知交互，来进行三文虚拟漫游的一种现代新型技术。这一技术，将彻底地改变传统浏览模式，解决传统三文虚拟展示的繁琐性，突破平面的局限性，使得用户能更有效、便捷地进行漫游，更身临其境地感受到场景的空间感、设计效果，以此来实现强大的实景虚拟漫游，形成用户互动极强的虚拟与现实融合的三文实景可视化效果。本课题利用三文虚拟技术的开放性、 共享性、 交互性、 超媒体性、大容量性这五大特点，以及虚拟现实交互所具有的多感知性、存在性、交互性和自主性这四个特征，基于全景图像的真实场景，以二文的角度，展现三文的视角。而在本课题中，首要研究了如何通过计算机图像图形技术和计算机视觉技术，将现实环境精确地在虚拟环境中表现，并进行交互设计，使得真实环境和虚拟的物体相互叠加、信息互补、同时存在，解决如何增强实景图片的表现力，进一步模糊真实世界与计算机所生成的虚拟世界之间的界线，给人以真实、直观、富有表现的立体三文真实场景。其次，在技术方面，解决了如何将实景图像组织起来形成全景图，运用Flash中提供的类包、脚本语言的编写来实现Flash 3D的效果、结合Flash 3D开源引擎PV3D（PaperVision3D），来实现全景图片实现实时交互动画的功能，使得用户可以在多个视点之间漫游，为用户提供一个交互友好、便捷美观的操纵界面。
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关键词： 虚拟现实交互；图形图像技术；Flash As3.0；PV3D；虚拟漫游技术
The Implementation of Virtual Roaming Technology
Abstract: Virtual Roaming Technology is a virtual reality interaction based on panoramic images, through a combination of virtual simulation and visual technology is extended to construct a virtual reality system, to carry out a full range of interactive display of the real scene, to provide all kinds of real-time interactive for the user, to a new type of modern technology of three-dimensional virtual roaming. This technology, will completely change the traditional browsing mode, to solve the complicated traditional 3D virtual display, break through the limitations of the plane, so that the user can be more effective, convenient to be personally on the scene roaming, more feel the scene sense of space, the effect of design, so as to realize virtual roaming the real strong, forming a three-dimensional scene visualization effect of the user interactive strong virtual and reality fusion. This topic using the 3D virtual technology openness, sharing, interactive, hypermedia, large capacity of the five major characteristics, and virtual reality interaction with multi-sensation, the existence of the four characteristic, interactivity and autonomy, the real scene based on panoramic images, two-dimensional angles, showing 3D perspective. In this paper, the primary research how to computer graphics and computer vision technology, the real environmental performance accurately in the virtual environment, and interaction design, making the real environment and virtual objects superimposed on each other, complementary information, exist at the same time, to solve the problem of how to enhance the real picture of performance, further blurring between the virtual world and real world computer generated line, give a person with real, intuitive, rich three-dimensional real scene. Secondly, in the aspect of technology, how to solve the real image of tissue forming the panorama, the use of Flash in the class package, written in Flash script language to realize the effect of 3D combined with Flash 3D engine, PV3D (PaperVision3D), to realize the panoramic picture of real-time interactive animation function, so that the user can roam between a plurality of viewpoints, to provide a friendly interaction, convenient and beautiful operation interface for users.
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