虚拟地理环境中全景图深度信息恢复与应用  

Restoration and application of panorama depth information in virtual geographic environment

作　　者：徐铮 李锋[1] 蒲泓亦 卢雪 XU Zheng;LI Feng;PU Hongyi;LU Xue(Institute of Geospatial Information,Strategic Support Force Information Engineering University,Zhengzhou 450000,China;92292 Troops,Qingdao 266000,China)

机构地区：[1]信息工程大学地理空间信息学院,郑州450000 [2]92292部队,青岛266000

出　　处：《时空信息学报》2023年第3期352-359,共8页JOURNAL OF SPATIO-TEMPORAL INFORMATION

基　　金：军委科技委基础加强计划领域基金项目(2019-JCJQ-JJ-121)。

摘　　要：针对空中全景图深度信息缺失导致无法进行空间分析量算的问题,本文提出一种基于虚拟地理环境的众源空中全景图深度信息恢复与空间分析量算应用的方法。首先,利用数字地表模型和倾斜摄影测量三维模型构建目标区域高精度虚拟地理环境,设计改进的后方交会算法解算众源空中全景图的拍摄参数;其次,采用射线求交算法计算全景图像点与地面点的距离并生成全景深度图;最后,设计基于深度信息的空中全景图空间分析量算模型,并在登封地区进行实验。结果表明,通过人机交互的方式,利用基于空中全景图深度信息的空间分析量算模型,能够对目标区域开展环境勘察,验证了该方法的有效性。In this paper,depth information from spherical panoramic images is obtained by using the traditional surveying and mapping data within a virtual geographic environment.A spatial analysis model of panoramic map based on depth information is designed in virtual geographic environment.This addresses the problem of aerial panoramic maps lacking support for spatial analysis and calculation.Additionally,it enhances the application of virtual geographic environment and deepen users’environmental cognitions.In this paper,high-precision digital surface models and oblique photography models are used to construct accurate 3D virtual scenes,which can provide accurate source data for restoration of panoramic depth information.The depth information of panorama is calculated,and a spatial analysis model is designed to realize spatial analysis and calculation functions of panoramas.The process involves four key steps:(1)Constructing the virtual geographic environment of the target area using high-precision digital surface model,oblique photography 3D models,and panoramic maps.(2)Selecting several groups of feature points,calculating the pixel coordinates of these feature points in the panoramic map through projection transformation,calculating the geographical coordinates of the corresponding feature points in the virtual geographic environment through coordinate transformation,and solving the shooting parameters of the panoramic camera using an improved rear intersection algorithm.(3)Registering the camera within the virtual geographic environment,forming rays from the camera position points and panoramic image points,and interesting these rays within terrain model rays in the 3D virtual scene to calculate the panoramic depth image.(4)Designing the spatial analysis measurement model,realizing analysis and measurement functions such as distance,area,and azimuth Angle by converting the pixel coordinates of panoramic image points into geographical coordinates,and displaying the calculation results in real-time.In this paper,the

关 键 词：空中全景图 虚拟地理环境 深度信息 后方交会 射线求交 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]