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FEASIBILITY STUDY OF VBS-RTK GPS SUPPORTED AERIAL TRIANGULATION FOR UAV IMAGES USING CONTROL ENTITIES AS CONTROL POINTS

机译:VBS-RTK GPS的可行性研究使用控制实体作为控制点的UAV图像支持空中三角测量

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Recently, UAV (Unmanned Aerial Vehicle) can be used in civil purpose such as mapping and disaster monitoring. UAV can collect high resolution images and fly under the cloud for mapping demands. VBS-RTK GPS (Virtual Base Station-Real Time Kinematic GPS) technique can be used to support bundle adjustment aerial triangulation of UAV images to reduce the demands of GCPs (ground control points). The offset between camera projection center and GPS antenna is solved by introducing drift parameter for each strip. Additionally, self-calibration bundle block adjustment can be employed in aerial triangulation to overcome imperfect calibration of non-metric camera. However, GCPs are still necessary to perform VBS-RTK GPS supported aerial triangulation for precise position and orientation of UAV images. In Taiwan, there are lots of historic aerial photogrammetric projects for large scale topographic mapping. If GCPs, called as control entities in this study, can be obtained from these projects, it can reduce the costs for surveying GCPs and improve the efficiency of aerial triangulation for UAV images. Therefore, this study will investigate the feasibility of GPS supported self-calibration bundle adjustment for UAV images by using control entities from historic aerial images as GCPs. Meanwhile, the appropriate configuration of control entities for VBS-RTK GPS supported self-calibration bundle adjustment for UAV images will be proposed in this study.
机译:最近,UAV(无人驾驶飞行器)可用于分类,如映射和灾害监测。 UAV可以收集高分辨率图像并在云下飞行以进行映射需求。 VBS-RTK GPS(虚拟基站 - 实时运动GPS)技术可用于支持UAV图像的束调整空中三角测量,以降低GCP的需求(地面控制点)。通过引入每个条带的漂移参数来解决摄像机投影中心和GPS天线之间的偏移。另外,可以采用自校准束块调节,以克服非度量相机的不完美校准。但是,GCPS仍然需要执行VBS-RTK GPS支持的空中三角扫描,以获得UAV图像的精确位置和方向。在台湾,有很多历史的空中摄影测量项目,用于大规模地形映射。如果GCPS称为本研究中的控制实体,则可以从这些项目获得,它可以降低测量GCP的成本,提高UAV图像的空中三角测量效率。因此,本研究将研究GPS支持的自校准捆绑对UAV图像的自校准束调整的可行性,通过使用历史的航拍图像作为GCPS的控制实体。同时,在本研究中提出了对VBS-RTK GPS的控制实体的适当配置将在本研究中提出了UAV图像的自校准束调整。

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