UAV PHOTOGRAMMETRY: BLOCK TRIANGULATION COMPARISONS
UAV PHOTOGRAMMETRY: BLOCK TRIANGULATION COMPARISONS
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无人机摄影测量：块三角测量比较
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
P. Dosso
中科院分区：
文献类型：
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作者：
Rossana Gini;D. Pagliari;D. Passoni;L. Pinto;G. Sona;P. Dosso
抽象的。无人机系统代表了一种灵活的技术，能够收集大量的高分辨率信息，用于度量和解释。在实验测试的框架内进行了部门。米兰理工大学的ICA验证矢量传感器系统，并评估由无人机获得的图像的度量精度，一块由固定翼系统拍摄的照片与几个软件进行三角测量。试验场是意大利公园（“Parco Adda诺德”）内的一个农村地区，可用于研究建筑物、道路、耕作和未耕作植被上的飞行和成像性能。无人机SenseFly配备了Canon Ixus 220 HS相机，在130米的高度自动飞越该地区，产生了分成5条的49张图像。通过GPS（NRTK测量）在该地区测量的16个预先信号化的地面控制点，可以参考区块和精度分析。飞行控制系统记录外部定向参数（位置和姿态）的近似值。用几种软件以辅助或自动方式处理该块：Erdas-LPS、EyeDEA（帕尔马大学）、Agisoft Photoscan、Pix 4UAV。结果比较数字表面模型之间的差异，方向参数和精度的差异，当可用。此外，各种软件获得的图像和地面点坐标被独立地用作内部科学软件进行比较调整的初始值，该软件可以应用限制条件来评价不同点提取方法的有效性和地面检查点的准确性。
Abstract. UAVs systems represent a flexible technology able to collect a big amount of high resolution information, both for metric and interpretation uses. In the frame of experimental tests carried out at Dept. ICA of Politecnico di Milano to validate vector-sensor systems and to assess metric accuracies of images acquired by UAVs, a block of photos taken by a fixed wing system is triangulated with several software. The test field is a rural area included in an Italian Park ("Parco Adda Nord"), useful to study flight and imagery performances on buildings, roads, cultivated and uncultivated vegetation. The UAV SenseFly, equipped with a camera Canon Ixus 220HS, flew autonomously over the area at a height of 130 m yielding a block of 49 images divided in 5 strips. Sixteen pre-signalized Ground Control Points, surveyed in the area through GPS (NRTK survey), allowed the referencing of the block and accuracy analyses. Approximate values for exterior orientation parameters (positions and attitudes) were recorded by the flight control system. The block was processed with several software: Erdas-LPS, EyeDEA (Univ. of Parma), Agisoft Photoscan, Pix4UAV, in assisted or automatic way. Results comparisons are given in terms of differences among digital surface models, differences in orientation parameters and accuracies, when available. Moreover, image and ground point coordinates obtained by the various software were independently used as initial values in a comparative adjustment made by scientific in-house software, which can apply constraints to evaluate the effectiveness of different methods of point extraction and accuracies on ground check points.