无人机倾斜摄影像控布点方案研究及精度分析

随着无人机装备及基于计算机的数字图像处理技术的快速发展,无人机在测绘行业的应用领域也越来越广泛。尤其在当前自然资源发展的新形势下,各地三维“一张图”的需求越来越迫切,无人机倾斜摄影测量技术因其方便灵活、操作简单得到迅猛发展。但无人机数据普遍存在高程精度低等问题,后续需要大量控制点改善精度。而现有的无人机低空摄影测量外业规范已不能适应无人机作业要求。因此,本文在兼顾效率及成果精度的基础上,探讨了不同像控布设方案对无人机倾斜摄影遥感系统空三精度及三维实景模型成果产生的影响,并进行相关试验和精度分析。

Research and accuracy analysis of image control point arrangement schemes for UAV oblique photography

With the rapid development of UAV equipment and computer-based digital image processing technology, UAV is more and more widely used in surveying and mapping industry. Especially in the current new form of natural resources development, the demand for three-dimensional “one map” is more and more urgent. UAV oblique photogrammetry technology has developed rapidly because of its convenience, flexibility and simple operation. But the UAV data generally has the problem of low elevation accuracy, and a large number of control points are needed to improve the accuracy. However, the existing specifications for field work of low-altitude digital aerophotogrammetry can not meet the requirements of UAV operation. Therefore, on the basis of considering the efficiency and the accuracy of the results, this paper discusses the influence of different image control layout schemes on the three dimensional accuracy of the UAV oblique photography remote sensing system and the results of the three-dimensional real scene model, and conducts relevant tests and accuracy analysis.