地理配准技术是增强现实与地理信息系统结合应用的一项关键技术,其配准精度对ARGIS(Augmented Reality Geographic Information System)的可用性有显著的影响。针对增强现实这一应用,阐释了增强现实地理配准的基本概念与技术原理,提出...地理配准技术是增强现实与地理信息系统结合应用的一项关键技术,其配准精度对ARGIS(Augmented Reality Geographic Information System)的可用性有显著的影响。针对增强现实这一应用,阐释了增强现实地理配准的基本概念与技术原理,提出了地理配准精度量化评估方法;结合预先采集的高精度地理信息数据,采用多种硬件设备设计了不同的地理配准精度评估方案,实际评估了各类地理配准方法的量化精度;基于评估结果,进一步分析了配准误差因素及各方法的局限性,探讨了不同应用场景的配准方案思路,为后续研究提供参考和借鉴。展开更多
Augmented Reality Geographic Information System(ARGIS) applications can only provide users accurate content services with a highly precise geo-registration.However,the absolute 6DOF(Degree of Freedom) pose provided by...Augmented Reality Geographic Information System(ARGIS) applications can only provide users accurate content services with a highly precise geo-registration.However,the absolute 6DOF(Degree of Freedom) pose provided by the portable sensors is usually inaccurate in urban outdoors,resulting in poorly geo-registration accuracy for ARGIS applications.Aiming at this issue,an automatic vision-aided localization method based on the 2D map is proposed to improve the initial localization accuracy of the portable sensors,and an overall geo-registration optimization framework for outdoor ARGIS is proposed.Based on the initial pose provided by the sensors,the basic principles of the vision-aided localization method are expounded in detail.The experimental results show that the proposed method can effectively correct the initial pose obtained by the pose sensors,and improve the geo-registration accuracy of outdoor ARGIS applications ultimately.展开更多
城市视频实景地图兼具地图立体空间、视频时间4维度层面信息统一表达能力,对于我国城市立体监控系统构建、互联网地图产品发展,以及未来实景3维中国建设战略实施具有重要意义和应用价值。为引起更多研究者进行探索,对城市视频实景地图...城市视频实景地图兼具地图立体空间、视频时间4维度层面信息统一表达能力,对于我国城市立体监控系统构建、互联网地图产品发展,以及未来实景3维中国建设战略实施具有重要意义和应用价值。为引起更多研究者进行探索,对城市视频实景地图构建方法、技术及其应用前景进行讨论。从增强虚拟环境技术(AVE)角度出发,对融合全景视频与地理3维模型构建城市视频实景地图涉及的全景摄像机标定、全景视频空间配准及视频纹理映射、实时渲染系列技术、方法进行了梳理。经过分析得出:1)适合传统'针孔'模型的摄像机标定、影像空间配准理论和方法,需根据全景摄像机球面投影模型进行拓展;2)适合静态纹理的大规模3D场景渲染LOD(levels of detail)技术和策略,需结合视频传输带宽限制、高帧率特点进行技术创新。城市视频实景地图构建是一项值得重视的崭新课题,将有力促进互联网、人工智能前沿技术发展,有望给相关行业带来万亿级市场机遇。展开更多
文摘地理配准技术是增强现实与地理信息系统结合应用的一项关键技术,其配准精度对ARGIS(Augmented Reality Geographic Information System)的可用性有显著的影响。针对增强现实这一应用,阐释了增强现实地理配准的基本概念与技术原理,提出了地理配准精度量化评估方法;结合预先采集的高精度地理信息数据,采用多种硬件设备设计了不同的地理配准精度评估方案,实际评估了各类地理配准方法的量化精度;基于评估结果,进一步分析了配准误差因素及各方法的局限性,探讨了不同应用场景的配准方案思路,为后续研究提供参考和借鉴。
文摘Augmented Reality Geographic Information System(ARGIS) applications can only provide users accurate content services with a highly precise geo-registration.However,the absolute 6DOF(Degree of Freedom) pose provided by the portable sensors is usually inaccurate in urban outdoors,resulting in poorly geo-registration accuracy for ARGIS applications.Aiming at this issue,an automatic vision-aided localization method based on the 2D map is proposed to improve the initial localization accuracy of the portable sensors,and an overall geo-registration optimization framework for outdoor ARGIS is proposed.Based on the initial pose provided by the sensors,the basic principles of the vision-aided localization method are expounded in detail.The experimental results show that the proposed method can effectively correct the initial pose obtained by the pose sensors,and improve the geo-registration accuracy of outdoor ARGIS applications ultimately.
文摘城市视频实景地图兼具地图立体空间、视频时间4维度层面信息统一表达能力,对于我国城市立体监控系统构建、互联网地图产品发展,以及未来实景3维中国建设战略实施具有重要意义和应用价值。为引起更多研究者进行探索,对城市视频实景地图构建方法、技术及其应用前景进行讨论。从增强虚拟环境技术(AVE)角度出发,对融合全景视频与地理3维模型构建城市视频实景地图涉及的全景摄像机标定、全景视频空间配准及视频纹理映射、实时渲染系列技术、方法进行了梳理。经过分析得出:1)适合传统'针孔'模型的摄像机标定、影像空间配准理论和方法,需根据全景摄像机球面投影模型进行拓展;2)适合静态纹理的大规模3D场景渲染LOD(levels of detail)技术和策略,需结合视频传输带宽限制、高帧率特点进行技术创新。城市视频实景地图构建是一项值得重视的崭新课题,将有力促进互联网、人工智能前沿技术发展,有望给相关行业带来万亿级市场机遇。
