摘要
在地形测量过程中地面分辨率冗余性较高,从而增加影像数据量,导致地形测量效果较差,为此设计一种固定翼无人机低空航摄数字化地形测量方法。结合固定翼无人机航空摄影的规范要求,确定数字影像的覆盖宽度,增加影像数据量,获取地形影像作业,对航测像片旋转处理与图像空三加密,并对图像中关键点方向分配,通过计算得到的位置、尺度和方向信息的关键点,输出地形测量的关键点,以此完成固定翼无人机低空航摄数字化地形测量。实验通过测量投入人数与测量时间两个指标衡量测量效率,结果表明,此次设计的固定翼无人机低空航摄数字化地形测量方法比传统两种方法耗费人力少,并且输出的正摄影像分辨率高,证明此次设计的方法不仅能够减少测量过程中的人员投入,还能够提高测量图像的分辨率。
In the process of terrain measurement,the ground resolution has high redundancy,which increases the amount of image data,resulting in poor terrain measurement effect.For this purpose,a fixed-wing UAV low-altitude aerial digital terrain measurement method is designed.Combined with the specification requirements of fixed-wing UAV aerial photography,determine the coverage width of digital images,increase the amount of image data,obtain topographic image operations,encrypt the aerial survey photo rotation and image space,and assign key points in the image.By calculating the key points of the position,scale and direction information,the key points of the terrain measurement are output to complete the digital terrain measurement of the low-altitude aerial photography of the fixed-wing UAV.The experiment measures the measurement efficiency by measuring the number of input people and the measurement time.The results show that the digital terrain measurement method for lowaltitude aerial photography of the fixed-wing UAV designed this time is less labor-intensive than the traditional two methods,and the output positive image has high resolution proves that the method designed this time can not only reduce the personnel input in the measurement process,but also improve the resolution of the measurement image.
作者
包晓峰
王文
揭江伟
BAO Xiao-feng;WANG Wen;JIE Jiang-wei(Qinghai Urban Planning&Design Ins Titute Co.,Ltd.,Xining 810008;Sichuan Shukang Geological Survey Engineering Company,Chongzhou 611230)
出处
《环境技术》
2020年第6期86-91,共6页
Environmental Technology
关键词
固定翼无人机
低空航摄
数字化地形测量
航线
像片旋转
fixed-wing unmanned aerial vehicle
low-altitude aerial photography
digital terrain measurement
flight line
photo rotation
