Study On Low-level Remote Sensing Images Of UAV

Spaceflight remote sensing can not completely replace airborne remote sensing. Due to low cost, taking off and landing convenience, flexible operation, strong mobility and other characteristics, unmanned aerial vehicle low-altitude remote sensing systems are widely used in small area aerial photogrammetry(such as surveying and mapping of industrial square plan, new rural construction plans and so on),target image acquisition of dangerous areas, disaster monitoring and emergency command, anti-smuggling patrols in sea and air and other fields. The unmanned trend, fully automatization, high efficiency and high-resolution represented by UAV remote sensing system are the major trends of future airborne remote sensing.Firstly, the application status and system components of UAV are introduced in this paper. Then the advantages and disadvantages of UAV remote sensing system are analyzed. Furthermore, combined with remote sensing school of the Chinese Academy of Sciences "full-wave band optical remote sensing indoor calibration field" issue and Shanxi Lu'an Mining Group "multi-angle remote sensing image production in mining area" project examples, the quality management of UAV aerial photogrammetry, digital image preprocessing, filtering and lens distortion correction methods are discussed.The methods of orthophoto (DOM) production based on ERDAS LPS software, construction of high precision digital elevation model (DEM) and production of large-scale tilted images are researched. In the face of key technical problems that tilt images' registration accuracy is low, three solutions are proposed, and 1:2000 orthophoto and tilt image map for Lu'an Group headquarters are created.In addition,the advantages and disadvantages of UAV low-altitude remote sensing images and LiDAR point cloud data used in three-dimensional modeling are also analyzed respectively, and the technical problem and prospect of integration of the above both applied in three-dimensional modeling are studied.