基于多视几何理论的多旋翼无人机大比例尺测图应用

Application of Large-scale Surveying and Mapping by Drone with Multiple Rotating Wings Based on Multiple View Geometry

通过对多视几何理论原理的推导,发现其对相机参数和飞行姿态无苛刻要求,但物方定位精度对像点坐标敏感。基于此规律提出了大重叠度高分辨率航摄、顾及地形起伏的严密航线设计、顾及光照条件的相机参数设置、较大面积的弱纹理区域多层航摄的实用航摄方案,同时给出高精度像控点布设方案和空三处理技巧。用消费级多旋翼无人机对平地、丘陵、山地三类地形进行航测精度验证,结果可满足各类地形大比例尺地形图测绘需求,为小面积高精度地形测绘提供有效解决方案。

Through deriving the multiple view geometry theoretical principal, it finds that this theory requires flexibly on the camera pa- rmneters and flying attitude. But the subject positioning precision is sensitive to the image point coordinates. Based on this law, the aerial photographing with large overlapping and high resolution, the strict aerial line design with consideration of undulating topography, the camera parameter configuration with consideration of lighting conditions, and the practical aerial photographing for large weak textural area with multiple-layer aerial photographing are proposed. Meanwhile, schemes for image control points with high precision and the aerial tri- angle surveying handling skills are provided. The affordable drone with multiple rotating wings is applied to verify the aerial surveying precision of plain, hill and mountain. It presents that requirements on the large-scale topo surveying and mapping for various topography can be satisfied. This provides the high-precision topo surveying and mapping of small area with solution.