Technique of Low Aerial Photography and Photogrammetry System by Unmanned Helicopter

This paper studied and founded a low aerial photography and photogrammetry system by unmanned helicopter.By using unmanned helicopter remote sensing platform and a digital camera,the high-resolution digital photography could be captured directly.The advantages of this system were summarized as follows: vertical take-off and landing,low altitude flying,fully autonomous flight control.In this paper,we introduced the system's principle and summarized the method of designing the aerial photography's key parameters.At the same time,we put forward the flying model of sight-range grid.Thus,it could enhance the system's security.By using the technique of camera calibration in experiment felid,we realized the photogrammetry application with non-surveying digital camera.Finally,the paper introduced the application and precious checking results by making this system applied in the 15 km2 fields of a large-scale survey and mapping.