搭载五镜头相机消费级无人机倾斜摄影测量技术

Tilt Photogrammetry Technology of Consumer UAV Equipped with Five Lens Camera

利用消费级无人机大疆精灵四搭载KG2000Pro五镜头倾斜相机,对倾斜摄影空中三角测量精度和控制点布设方案进行了对比研究。结果表明:在相同测区、相同控制点数量以及相同控制点布设方案下,倾斜影像的中误差>下视影像的中误差>多视影像的中误差,控制点越多,测量精度越好,但外业测绘工作量也越大,当控制点达到15个后,测量精度基本趋于稳定;针对影像覆盖度存在的中间区域密集、四周边缘薄弱问题,设计了6种增强测区边角控制的控制点布设方案,通过参与空中三角测量解算,认为当影像覆盖度高、但测区不易进入时,宜选用四角点组布设方案,当影像覆盖度低、但测区比较平坦时,宜选用区域网均匀布设方案。

Using G2000 Pro five lens tilt camera equipped with Dajiang spirit IV,a consumer UAV,the aerial triangulation accuracy and control point layout scheme of tilt photography were compared and studied.The results showed that:under the same survey area,the same number of control points and the same control point layout scheme,the mean square error of tilt image is higher than that of down looking Image,and the mean square error of down looking Imageis higher than that of multi view image.The more control points,the better the measurement accuracy,but the greater the workload of field surveying and mapping.When the control points reached 15,the measurement accuracy basically tended to be stable;for the intermediate area of image coverage in order to solve the problem of dense and weak edge around,six kinds of control point layout schemes were designed to enhance the edge control of the survey area.Through participating in aerial triangulation calculation,it was considered that when the image coverage was high,but the survey area was not easy to enter,the layout scheme of four corner point group should be selected.When the image coverage was low,but the survey area was relatively flat,the plan of uniform layout of regional network should be selected.