摘要
在无人机低空航拍航测作业中,由于高速飞行相机会出现果冻效应,导致图像分辨率下降,因此提出基于改进引导滤波的无人机低空航拍航测技术研究。根据航拍航测目标,规划无人机低空航拍轨迹,利用光学成像原理拍摄低空对地图像。利用改进引导滤波对于低空对地图像进行处理,解决因果冻效应导致图像失真与局部变形的问题,提升图像质量,结合通过边缘与几何特征提取与计算得出无人机低空航拍航测结果。实验测试结果表明,与传统技术相比,优化设计航拍航测技术得出的航拍图像分辨率明显提升,占地面积航测误差为1.9 km^(2),具有实际应用价值。
In low-altitude aerial photography and photogrammetry using unmanned aerial vehicle(UAV),the jelly effect caused by high-speed flight cameras can result in a decrease in image resolution.This paper presented a study on UAV lowaltitude aerial photography and photogrammetry technology based on improved guided filtering.The UAV’s low-altitude flight trajectory was planned according to the photogrammetry objectives,and optical imaging principles were applied to cap⁃ture low-altitude images of the map.Improved guided filtering was used to process the low-altitude map images,addressing issues such as image distortion and local deformation caused by the jelly effect,thereby enhancing image quality.The UAV’s low-altitude aerial photography and photogrammetry results were derived through edge and geometric feature extraction and calculation.Experimental test results show that compared with traditional technologies,the optimized aerial photography and photogrammetry technology significantly improves image resolution,with a land area measurement error of 1.9 km^(2),demon⁃strating its practical application value.
作者
武燕强
WU Yanqiang(Gansu Corps,China Building Materials Industrial Geological Exploration Center,Tianshui,Gansu 741000,China)
出处
《北京测绘》
2025年第9期1300-1306,共7页
Beijing Surveying and Mapping
关键词
改进引导滤波
无人机
低空拍摄
航拍航测
测绘技术
improve guided filtering
unmanned aerial vehicle(UAV)
low-altitude photography
aerial photography and photogrammetry
surveying and mapping technology
