The invention relates to a desert shrub height measuring method based on unmanned aerial vehicle photography, comprising an unmanned aerial vehicle and a ground marking rod, the desert shrub height measuring method comprises the following steps: firstly, in sunny weather, the wind speed is 1t; before 10 a.m. or after 15 p.m. at the speed of 5 m/s, the ground marking rods, the desert shrubs and shadows of the desert shrubs are photographed through the unmanned aerial vehicle; extracting latitude and longitude and shooting time information contained in the unmanned aerial vehicle photo, and then calculating a solar dip angle and a solar altitude angle; and a manual measurement function: calculating the actual length of the shadow of the target object according to the ratio of the marker post with the known length to the shadow of the target object, and obtaining the height of the target object according to the solar altitude and the shadow length. After the structure is adopted, the invention has the following advantages: the invention relates to a method for measuring and calculating the height of the target object by utilizing the shadow length of the object and the solar altitude angle. The method can greatly simplify the measurement and calculation of the height of a ground object, is particularly suitable for estimating the height of sparse shrub plants in desert areas, and can also be used for measuring and calculating the heights of buildings and the like in other relatively wide areas.
本发明涉及一种基于无人机摄影的荒漠灌木高度测定方法,包括无人机和地面标示杆,所述的荒漠灌木高度测定方法包括以下步骤:首先在天气晴朗,风速<5m/s的上午10点以前或下午15点以后,通过无人机对地面标示杆和荒漠灌木及其影子进行拍照;提取无人机照片中包含的经纬度和拍摄时间信息,然后计算太阳倾角和太阳高度角;手动测量功能,通过已知长度的标杆与目标物体影子的比例计算目标物体影子的实际长度,由太阳高度角和影子长度获取目标物体的高度。采用以上结构后,本发明具有如下优点:本发明涉及一种利用物体影子长度和太阳高度角对目标物体高度进行测算方法。本方法可极大简化地面物体高度的测算,本发明尤其适用于荒漠地区稀疏灌木植物高度的估算,本发明也可用于其它相对开阔地区建筑物等高度的测算。
Desert shrub height measuring method based on unmanned aerial vehicle photography
一种基于无人机摄影的荒漠灌木高度测定方法
2024-02-20
Patent
Elektronische Ressource
Chinesisch
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