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Yizhuo Zhang, Hantao Liu, Xingyu Liu and Huiling Yu
Due to the complex structure of high-canopy-density forests, the traditional individual tree segmentation (ITS) algorithms based on ALS point cloud, which set segmentation threshold manually, is difficult to adequately cover a variety of complex situatio...
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Jean-Jacques Ponciano, Moritz Roetner, Alexander Reiterer and Frank Boochs
Through the power of new sensing technologies, we are increasingly digitizing the real world. However, instruments produce unstructured data, mainly in the form of point clouds for 3D data and images for 2D data. Nevertheless, many applications (such as ...
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Yongjun Wang, Tengping Jiang, Jing Liu, Xiaorui Li and Chong Liang
Individual tree segmentation is essential for many applications in city management and urban ecology. Light Detection and Ranging (LiDAR) system acquires accurate point clouds in a fast and environmentally-friendly manner, which enables single tree detec...
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Ângela M. K. Hentz,Carlos A. Silva,Ana P. Dalla Corte,Sylvio P. Netto,Michael P. Strager,Carine Klauberg
Pág. e005
Aim of study: In this study we applied 3D point clouds generated by images obtained from an Unmanned Aerial Vehicle (UAV) to evaluate the uniformity of young forest stands.Area of study: Two commercial forest stands were selected, with two plots each. Th...
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Juan Guerra Hernandez,Eduardo Gonzalez-Ferreiro,Alexandre Sarmento,João Silva,Alexandra Nunes,Alexandra Cristina Correia,Luis Fontes,Margarida Tomé,Ramon Diaz-Varela
Pág. eSC09
Aim of study: The study aims to analyse the potential use of low-cost unmanned aerial vehicle (UAV) imagery for the estimation of Pinus pinea L. variables at the individual tree level (position, tree height and crown diameter).Area of study: This study w...
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Topi Tanhuanpää, Ninni Saarinen, Ville Kankare, Kimmo Nurminen, Mikko Vastaranta, Eija Honkavaara, Mika Karjalainen, Xiaowei Yu, Markus Holopainen and Juha Hyyppä
Height models based on high-altitude aerial images provide a low-cost means of generating detailed 3D models of the forest canopy. In this study, the performance of these height models in the detection of individual trees was evaluated in a commercially ...
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Azita Ahmad Zawawi,Masami Shiba,Noor Janatun Naim Jemali
Pág. e002
Aim of study: To present an approach for estimating tree heights, stand density and crown patches using LiDAR data in a subtropical broad-leaved forest.Area of study: The study was conducted within the Yambaru subtropical evergreen broad-leaved forest, O...
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