双模三维环境下的态势标绘技术研究

Research of Situation Plotting under Dual Mode 3D Environment

针对虚拟三维环境态势标绘存在精度低、交互操作难以控制的缺点,提出了一种双模三维环境下的态势标绘与显示技术。首先利用遥感正射影像和DEM制作立体辅助影像,构建由立体辅助影像对形成的真实三维环境,并将其与传统虚拟三维环境无缝集成;利用立体辅助影像的高精度量测的特性,在真实三维环境中精确采集态势符号定位点,根据标绘规范形成三维态势符号;最后在虚拟三维环境中进行态势的逼真显示。实验结果表明:双模三维环境下的态势标绘技术能够有效避免三维符号与地形之间的混叠,提高态势标绘精度,是高分辨率遥感卫星影像的一种新应用模式。

Aiming at solving the shortcomings of low accuracy and difficulty in controlling interactive manipulation existed in virtual three-dimensional environmental situation plotting, this paper proposed a new situation plotting and demonstration method under dual mode three-dimensional environment. The true three-dimensional environ- ment is built firstly by stereo assistant pair, which is constructed by the remote sensing orthoimage and DEM, and it is integrated with the traditional virtual three-dimensional environment seamlessly. Based on the standard plotting regulation, the three-dimensional situation symbols is formed using the located points, which is accurately acquired under true three-dimensional environment with the aid of the high-accurate measuration character of the stereo as- sistant image pair. Finally, the three-dimensional situation symbols are displayed life-likely in the virtual three-di- mensional environment. The experiment results showed that the situation plotting technology under dual mode three- dimensional environment can effectively avoid the overlapping of the three-dimensional symbols and the terrain, and enhance the accuracy of situation plotting, it has been a new application model of high resolution remote sens- ing satellite images.