顾及曝光延迟的无人机GPS辅助光束法平差方法

GPS-supported Bundle Adjustment Method of UAV by Considering Exposure Delay

现有GPS辅助光束法区域网平差方法没有顾及无人机进行摄影测量参与作业的情况。针对相机的曝光延迟误差影响不一致而导致实际平差结果较理论估值低的问题,本文探讨了曝光延迟产生的机理并分析曝光延迟对GPS辅助光束法平差的影响,提出了一种顾及曝光延迟的GPS辅助光束法平差方法。通过采用不同控制点个数及布设方案,对一套包含142张无人机影像数据进行试验分析,验证了该方法的有效性。该方法的研究意义在于可以在传统GPS辅助光束法平差方法的基础上进一步提高空三加密精度。

The existing GPS-supported bundle adjustment method does not take into account the influence of camera exposure delay error impact in UAV photogrammetry is inconsistent which leading to the actual adjustment results are worse than the theoretical results.The mechanism of exposure delay is studied.The impact of exposure delay on GPS-supported bundle adjustment is analyzed.And a GPS-supported bundle adjustment method by considering the exposure delay is proposed.The effectiveness of the proposed method is verified by a typical dataset of 142 images.The meaning of the proposed method is that it can achieve the better aerotriangulation accuracy than the traditional GPS-supported bundle adjustment method.