基于增强现实的堆石坝工程三维可视化场景构建研究

摘要

In view of the problem that a large number of complex environment models in rockfill dam project visualization of hydraulic engineering need to be established and that the environment models cann't be timely changed with project construction progress which causes the decline of intuition,the Augmented Reality (AR) technology is introduced to the 3D visualization scene construction of rockfill dam project,and the AR-based 3D visualization of rockfill dam project is achieved.The key technologies include 3D modeling method of hydraulic structures,hardware-based virtual camera registration method,video surveillance technology method and virtual and real image fusion method.The parameters of virtual camera are set as the same as them of real camera by the method of hardware-based virtual camera registration,and the image shot by virtual camera is fused into the image shot by real camera to achieve AR.Taking a project as an example,the 3D models of hydraulic structures are established,the 3D registration of the virtual camera is completed by the method of hardware-based virtual camera registration,and the AR-based 3D visualization of rockfill dam project is finally achieved.The results show that the study can directly show the virtual hydraulic structure models in real scene of project and increase the intuition of visualization.%针对堆石坝工程可视化中需建立大量复杂的环境模型,并且环境模型不能随工程进行及时修改而造成可视化直观性下降的问题,将增强现实技术AR(Augmented Reality)引入堆石坝工程可视化三维场的构建中,实现了基于增强现实的堆石坝工程三维可视化.关键技术包括水工建筑物的建模方法、基于硬件的虚拟相机注册方法、视频监控技术以及虚实图像融合方法等,通过基于硬件的虚拟相机注册技术将虚拟相机拍摄的水工建筑物模型和真实相机拍摄的真实场景融合,以获得增强现实效果.以某工程为例,建立了水工建筑物模型,并通过基于硬件的方式完成了相机三维注册,实现了基于增强现实的堆石坝工程三维可视化.结果表明,该研究能在真实的施工场景中直接显示出虚拟的水工建筑物模型,增强了工程可视化的直观性.