Remote sensing image acquisition method of UAV with variable altitude in the same sortie

Abstract

Provided is a method for obtaining remote-sensing images by a same-sortie variable-flight-height unmanned aerial vehicle. The method comprises an unmanned aerial vehicle body, an unmanned aerial vehicle flight height control module and aerial photography equipment carried by the unmanned aerial vehicle body. The method is characterized in that in the flying process of the unmanned aerial vehicle, the flight height of the unmanned aerial vehicle is dynamically adjusted according to changes of heights of terrains. The method has the advantages that under the condition that the take-off and landing times are reduced, the situation that the ground resolution of the images is in a good state is effectively guaranteed, meanwhile, consistency of the ground resolution of the different images is good, and processing difficulty of the images in the later period is reduced.

Description

technical field [0001] The invention relates to a technology for aerial photography by using a UAV, in particular to a method for acquiring remote sensing images of an UAV with the same sortie and variable altitude. Background technique [0002] Surveying and mapping, as a preliminary and basic work in social development and economic construction, has very important practical significance for urban and rural overall planning and new rural construction in mountainous areas; UAV technology is an emerging technology that has emerged in recent years , compared with previous aerial photography methods, the use of drones for aerial photography has the advantages of low cost and convenient operation; [0003] In the existing technology, UAV technology has been applied in surveying and mapping operations, but the current application environment is limited to the acquisition of remote sensing images in plain areas. Under the circumstances, when the UAV is taking aerial photography o...

AI Technical Summary

Problems solved by technology

[0004] For mountainous areas, due to the large terrain fluctuations, the relative height between the UAV and the ground is in a dynamic state, and the relative height is an important factor affecting the image resolution. During aerial photography, the ground resolution of aerial photography images is uneven, sometimes good and sometimes bad, which not only increases the difficulty of image matching in the office, but also requires more driving times to ensure the consistency of ground resolution Frequent take-off and landing of UAVs to perform repeated shooting operations at different heights in the same area, the operation is cumbersome, the equipment wears out seriously, and with the increase in the number of take-offs, the probability of accidents also increases relatively

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