Urbančič Tilen, Roškar Žiga, Kosmatin Fras Mojca, Grigillo Dejan
Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova cesta 2, 1000 Ljubljana, Slovenia.
Leica Geosystems AG, Heinrich-Wild-Strasse, CH-9435 Heerbrugg, Switzerland.
Sensors (Basel). 2019 Jul 19;19(14):3179. doi: 10.3390/s19143179.
The main goal of our research was to design and implement an innovative target that would be suitable for accurately registering point clouds produced from unmanned aerial vehicle (UAV) images and terrestrial laser scans. Our new target is composed of three perpendicular planes that combine the properties of plane and volume targets. The new target enables the precise determination of reference target points in aerial and terrestrial point clouds. Different types of commonly used plane and volume targets as well as the new target were placed in an established test area in order to evaluate their performance. The targets were scanned from multiple scanner stations and surveyed with an unmanned aerial vehicle DJI Phantom 4 PRO at three different altitudes (20, 40, and 75 m). The reference data were measured with a Leica Nova MS50 MultiStation. Several registrations were performed, each time with a different target. The quality of these registrations was assessed on the check points. The results showed that the new target yielded the best results in all cases, which confirmed our initial expectations. The proposed new target is innovative and not difficult to create and use.
我们研究的主要目标是设计并实现一种创新型靶标，该靶标适用于精确配准由无人机（UAV）图像和地面激光扫描生成的点云。我们的新靶标由三个相互垂直的平面组成，结合了平面靶标和体积靶标的特性。这种新靶标能够在航空和地面点云中精确确定参考靶标点。为了评估不同类型常用平面靶标、体积靶标以及新靶标的性能，我们将它们放置在一个既定的测试区域。从多个扫描站对这些靶标进行扫描，并使用大疆精灵4 PRO无人机在三个不同高度（20米、40米和75米）进行测量。参考数据使用徕卡Nova MS50多站测量仪进行测量。每次使用不同的靶标进行多次配准。在检查点上评估这些配准的质量。结果表明，新靶标在所有情况下都产生了最佳结果，这证实了我们最初的预期。所提出的新靶标具有创新性，且制作和使用并不困难。
