Using UAVs for detection of trees from digital surface models
- 197 Downloads
A difficult problem in forestry is tree inventory. In this study, a GoProHero attached to a small unmanned aerial vehicle was used to capture images of a small area covered by pinus pinea trees. Then, a digital surface model was generated with image matching. The elevation model representing the terrain surface, a ‘digital terrain model’, was extracted from the digital surface model using morphological filtering. Individual trees were extracted by analyzing elevation flow on the digital elevation model because the elevation reached the highest value on the tree peaks compared to the neighborhood elevation pixels. The quality of the results was assessed by comparison with reference data for correctness of the estimated number of trees. The tree heights were calculated and evaluated with ground truth dataset. The results showed 80% correctness and 90% completeness.
KeywordsTree detection Digital surface model Fish-eye camera Photogrammetry UAV
The author acknowledges the support of Dr. Halil İbrahim YOLCU for controlling the UAV system, student Batuhan GÜLLÜDERE, and lecturers Tevfik Fikret HORZUM, Ercüment AKSOY, and their student team for their help during the fieldwork.
- Bertram TT, Bock TT, Bulgakov AG, Evgenov AA (2014) Generation the 3D model building by using the quadcopter. In: Proceedings of the 31st ISARC, Sydney, p 6Google Scholar
- Fritz A, Kattenborn T, Koch B (2013) Uav-based photogrammetric point clouds—tree STEM mapping in open stands in comparison to terrestrial laser scanner point clouds. ISPRS Arch 41(W2):141–146Google Scholar
- Kattenborn T, Sperlich M, Bataua K, Koch B (2014) Automatic single tree detection in plantations using UAV-based photogrammetric point clouds. ISPRS Arch 43:139–144Google Scholar
- Pateraki M (2005) Adaptive multi-image matching for DSM generation from airborne linear array CCD data. Ph. D. dissertation, No. 86, Institute of Geodesy and Photogrammetry, ETH Zurich, p 170Google Scholar
- Roth AF (1983) Thinning pine stands for top returns. ANR-96. http://goo.gl/cHMwC4. Accessed on 04 April 2016
- Suarez JC, Ontiveros C, Smith S, Snape S (2005) Use of airborne LiDAR and aerial photography in the estimation of individual tree heights in forestry. Remote Sens Environ 31:253–262Google Scholar
- Zhang L, Gruen A (2004) Automatic DSM generation from linear array imagery data. ISPRS Arch 35(3):128–133Google Scholar