虚拟场景的3D显示控制关键技术研究
发布时间：2018-12-20 05:45
【摘要】：目前,很多基于三维建模与仿真技术的三维虚拟场景都是在二维平面进行展示。借助现有的3D显示设备及相关软件控制方法,实现虚拟场景的3D显示,对三维虚拟仿真及3D显示技术的应用与发展都有着重要的意义。本文基于OpenSceneGraph(OSG)渲染虚拟场景的控制技术及其算法,研究了实现虚拟场景3D显示所需的立体拍摄、交互控制、跟踪控制等一系列控制方法,实现了虚拟场景多种3D格式输出及控制,并在相应系统进行显示。论文的主要工作及成果包括:1.通过深入研究OSG编程方法以及OSG中相机矩阵的设置方法,实现了对虚拟场景的离轴拍摄控制。与其他拍摄方法相比,该方法具有公共场景区域大,并且没有梯形失真的特点。2.在离轴拍摄基础上,利用地面投影实现了楼盘等场景在地面上的3D显示。通过引入跟踪技术,实时控制虚拟相机,解决了由于观看者位置移动导致的三维场景畸变问题。3.实现了虚拟场景2D+D格式的输出,通过研究OpenGL投影过程以及输出的深度图像中场景深度与近平面、远平面的关系,实现了对输出深度图像中场景深度的控制。4.实现了正面投影系统的交互展示,利用离轴拍摄技术获取虚拟场景30路视差内容,并实现了该系统的同步控制、梯形失真校正,利用OSG交互控制方法改变立体相机的参数,实现了对场景视差的调整。
[Abstract]:At present, many 3D virtual scenes based on 3D modeling and simulation technology are displayed in two-dimensional plane. With the help of the existing 3D display equipment and related software control methods, the 3D display of virtual scene is realized, which is of great significance to the application and development of 3D virtual simulation and 3D display technology. Based on the control technology and algorithm of OpenSceneGraph (OSG) rendering virtual scene, this paper studies a series of control methods, such as stereo shooting, interactive control, tracking control and so on, which are needed to realize 3D display of virtual scene. A variety of virtual scene output and control in 3D format, and display in the corresponding system. The main work and achievements are as follows: 1. By studying the OSG programming method and the setting method of camera matrix in OSG, the off-axis shooting control of virtual scene is realized. Compared with other shooting methods, this method has the characteristics of large common scene area and no trapezoidal distortion. 2. On the basis of off-axis shooting, 3D display of buildings and other scenes on the ground is realized by using ground projection. By introducing tracking technology to control the virtual camera in real time, the problem of 3D scene distortion caused by the position movement of the viewer is solved. The output of 2D D format of virtual scene is realized. By studying the process of OpenGL projection and the relationship between the depth of scene and the near plane and far plane in the output depth image, the control of the depth of scene in the output depth image is realized. 4. The interactive display of front projection system is realized, and the 30 parallax content of virtual scene is obtained by off-axis shooting technology. The synchronization control, trapezoidal distortion correction and OSG interactive control method are used to change the parameters of stereo camera. The parallax of scene is adjusted.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.9
[Abstract]:At present, many 3D virtual scenes based on 3D modeling and simulation technology are displayed in two-dimensional plane. With the help of the existing 3D display equipment and related software control methods, the 3D display of virtual scene is realized, which is of great significance to the application and development of 3D virtual simulation and 3D display technology. Based on the control technology and algorithm of OpenSceneGraph (OSG) rendering virtual scene, this paper studies a series of control methods, such as stereo shooting, interactive control, tracking control and so on, which are needed to realize 3D display of virtual scene. A variety of virtual scene output and control in 3D format, and display in the corresponding system. The main work and achievements are as follows: 1. By studying the OSG programming method and the setting method of camera matrix in OSG, the off-axis shooting control of virtual scene is realized. Compared with other shooting methods, this method has the characteristics of large common scene area and no trapezoidal distortion. 2. On the basis of off-axis shooting, 3D display of buildings and other scenes on the ground is realized by using ground projection. By introducing tracking technology to control the virtual camera in real time, the problem of 3D scene distortion caused by the position movement of the viewer is solved. The output of 2D D format of virtual scene is realized. By studying the process of OpenGL projection and the relationship between the depth of scene and the near plane and far plane in the output depth image, the control of the depth of scene in the output depth image is realized. 4. The interactive display of front projection system is realized, and the 30 parallax content of virtual scene is obtained by off-axis shooting technology. The synchronization control, trapezoidal distortion correction and OSG interactive control method are used to change the parameters of stereo camera. The parallax of scene is adjusted.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP391.9
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