Practice and Analysis of Improving the Precision of Unmanned Aerial Vehicle Image Mosaic
Currently,drone products have been widely used in the field of aerial photogrammetry and also play an important role in intelligent seismic exploration engineering,providing efficient and accurate geographic information for seismic exploration acquisition.As a crucial step in unmanned aerial vehicle photogrammetry,the placement of image control points has a significant impact on the accuracy of aerial triangulation and mapping.The previous layout plans for image control points had problems such as excessive or insufficient collection of image control points,resulting in unstable mapping accuracy.This article focuses on the construction work area in hilly areas,and compares the spatial interpolation of different image control points.Checkpoints are used to check the accuracy of spatial interpolation and mapping for different image control points.According to the experiment,GNSS assisted aerial photography without image control points basically meets the requirements for seismic exploration ground object recognition and marking,and the three image control points meet the accuracy requirements for accurate road depiction,controlling the splicing error of aerial photos within 0.1m.
drone aerial surveyimage stitchingair triple precisionimage control point
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