adantages of uav- c opters for environmental a pplications
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Adantages of UAV- C opters for Environmental A pplications. Teja Kattenborn. Copter -UAVs as a plattform. In general enable heavier payloads / multiple sensors - PowerPoint PPT PresentationTRANSCRIPT
Adantages of UAV-Copters for Environmental Applications
Teja Kattenborn
Copter-UAVs as a plattform– In general enable heavier payloads / multiple sensors– Convertable payload enables more flexibility and versatile applications
(e.g. LIDAR, RGB-, NIR-, Thermal-, Hyperspectral-Cameras, Air-Quality sensors and data-loggers)
– Controllable camera mounting, viewing in any horizontal/vertical direction
Flight characteristics / planning
• Vertical take-off and landing, Feasibility to operate from very small sized areas (e.g. within forests, plantations)
• Nature of vertical take-off aircrafts enables various flight patterns, adaptable to application and terrain
Take-off / landing area, ca. 6*6 m
UAV-based photogrammetric point clouds - tree stem mapping in open stands (A. Fritz, T. Kattenborn, B. Koch, 2013)• tree stems = “vertical objects”
45° camera angle• Forests = complex 3D-structures
zick zack flight pattern
automatic detection of:• tree position• tree height• diameter at breast height (dbh)
Flight characteristics / planning: case study
3D-Reconstruction results:
• Potential low cruise speeds alow for high image overlapsHigh point densitiesLess occlusion by objects as vegetation / buildings
• Very good image quality due to high stability• High payload capacity enables SLR or digital System cameras
fast shooting speed (Lumix G3: ca. 90 images / min)
Photogammetric point clouds
Photogammetric point clouds: case study
Point cloud - RGB
Potential of Unmanned Aerial Vehicle Based Photogrammetric Point Clouds for Automatic Single Tree Detection (M. Sperlich, T. Kattenborn, 2013)
Test sites:a) Decidious forestb) coniferous forest
Image flight:• Altiutue 100m• 250 nadir images / site
Methods:• Calculation of DSM / DTM / nDSM• Pouring algorithm
Point cloud – height gradient
Photogammetric point clouds: case study
Test sites:a) Decidious forestb) Coniferous forest
Objectives:• Tree crown delination• Single tree detection
Results:• 193/212 trees detected• …
Potential of Unmanned Aerial Vehicle Based Photogrammetric Point Clouds for Automatic Single Tree Detection(M. Sperlich, T. Kattenborn, 2013)
Point cloud - RGBPoint cloud – height gradient
Replacement Possible ?
Thanks ...