控制点布设对无人机遥感精度的影响

无人机遥感以其高精度、高效率、低成本的优势正在被应用于越来越多的领域。与此同时,如何提高无人机遥感的精度正成为关注的热点。以2016年10月在北京市密云区威克铁矿进行的一次无人机飞行为基础,选取了飞行范围内的28个控制点以及90个验证点进行测量;将控制点编号分组,选用不同数量的控制点生成11幅DEM图像。提取出每一幅DEM图像上验证点所在坐标的高程值与实测值进行比较。最后得出结论:控制点对于无人机遥感影像的精度存在影响;但并不是控制点数目越多,精度越高。较好地探究了无人机遥感外业控制点的布设需求。

The influence of control points distribution for UAV remote sensing accuracy

UAV remote sensing for its high precision, high efficiency and low cost advantage is being applied in increasingly fields. Meanwhile, how to improve the precision of UAV remote sensing is becoming the controversial spot. This essay will choose different number of control points to generate 11 DEM images based on a UAV flight in October 2016 in Beijing Miyun area Waike iron ore, choosing 28 ground control points and 90 check points to measure and then the ground control points were numbered and grouped. Extracting the check points coordinates elevation values in each DEM image to compare with the measured values. Consequently, there is an experimental result being concluded: the precision of UAV remote sensing image is affected by control points instead of more number of control points or the higher precision. The significance of this paper is to better explore layout needs of the UAV remote sensing field control point.