Results 31 to 40 of about 1,026 (242)

A Region-Based Hierarchical Cross-Section Analysis for Individual Tree Crown Delineation Using ALS Data

Remote Sensing, 2017
In recent years, airborne Light Detection and Ranging (LiDAR) that provided three-dimensional forest information has been widely applied in forest inventory and has shown great potential in automatic individual tree crown delineation (ITCD).
Yinghui Zhao, Yuanshuo Hao, Zhen Zhen, Ying Quan   +3 more
doaj   +1 more source

Individual tree crown delineation in high-resolution remote sensing images based on U-Net

Neural Computing and Applications, 2022
AbstractWe present a deep learning-based framework for individual tree crown delineation in aerial and satellite images. This is an important task, e.g., for forest yield or carbon stock estimation. In contrast to earlier work, the presented method creates irregular polygons instead of bounding boxes and also provides a tree cover mask for areas that ...
Maximilian Freudenberg, Paul Magdon, Nils Nölke   +2 more
openaire   +2 more sources

From Peaks to Crowns: A Morphology-Based UAV-LiDAR Framework for Individual Tree Segmentation [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Recognising individual trees has important applications in forest ecology and management. Conventional individual tree segmentation methods tend to favour dominant trees with pronounced canopy surface features but have limited capability in detecting ...
Y. Guo, H. Li, J. Yuan, H. Su, T. Xu, H. Sun, Q. Ma, Q. Ma, Q. Ma, Q. Ma   +9 more
doaj   +1 more source

Individual Tree Detection and Crown Delineation with 3D Information from Multi-view Satellite Images [PDF]

Photogrammetric Engineering & Remote Sensing, 2019
Individual tree detection and crown delineation (<small>ITDD</small>) are critical in forest inventory management and remote sensing based forest surveys are largely carried out through satellite images. However, most of these surveys only use 2D spectral information which normally has not enough clues for <small>ITDD</small> ...
Changlin Xiao, Rongjun Qin, Xiao Xie, Xu Huang 0005   +3 more
openaire   +2 more sources

Automatic Tree Crown Extraction from UAS Multispectral Imagery for the Detection of Bark Beetle Disturbance in Mixed Forests

Remote Sensing, 2020
Multispectral imaging using unmanned aerial systems (UAS) enables rapid and accurate detection of pest insect infestations, which are an increasing threat to midlatitude natural forests.
Robert Minařík, Jakub Langhammer, Theodora Lendzioch   +2 more
doaj   +1 more source

Individual Tree Parameters Estimation for Chinese Fir (Cunninghamia lanceolate (Lamb.) Hook) Plantations of South China Using UAV Oblique Photography: Possibilities and Challenges

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Chinese fir (Cunninghamia lanceolate (Lamb.) Hook) individual tree parameters extraction is important for scientific forest management. However, high-precision parameters extraction by field investigation or spaceborne optical remote sensing is difficult
Tian Yin, Jian Zeng, Xiaoli Zhang, Xuemei Zhou   +3 more
doaj   +1 more source

Delineation of Individual Tree Crowns from ALS and Hyperspectral data: a comparison among four methods [PDF]

European Journal of Remote Sensing, 2015
In this paper four different delineation methods based on airborne laser scanning (ALS) and hyperspectral data are compared over a forest area in the Italian Alps.
Dalponte, Michele, Reyes, Francesco, Kandare, Kaja, Gianelle, Damiano   +3 more
openaire   +3 more sources

EXTRACTION OF FOREST STANDS PARAMETERS FROM ASTER DATA IN OPEN FOREST [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Tree crown size (CS) and stem number per hectare (SN) has become increasingly important for forest management and ecosystem monitoring. Tree crown size is also strongly related to other canopy structural parameters, such as diameter at breast height ...
M. Abbasi, H. R. Riyahi Bakhtyarib
doaj   +1 more source

Fusion of crown and trunk detections from airborne UAS based laser scanning for small area forest inventories

International Journal of Applied Earth Observations and Geoinformation, 2021
High density point clouds from unmanned airborne laser scanning (UALS) systems have great potential for small area forest inventories. We propose an UALS-based tree level inventory method that takes advantage of both the segmented crowns and segmented ...
Mikko Kukkonen, Matti Maltamo, Lauri Korhonen, Petteri Packalen   +3 more
doaj   +1 more source

A Comparative Assessment of the Performance of Individual Tree Crowns Delineation Algorithms from ALS Data in Tropical Forests [PDF]

Remote Sensing, 2019
Tropical forest canopies are comprised of tree crowns of multiple species varying in shape and height, and ground inventories do not usually reliably describe their structure. Airborne laser scanning data can be used to characterize these individual crowns, but analytical tools developed for boreal or temperate forests may require to be adjusted before
Mélaine Aubry-Kientz, Raphaël Dutrieux, Antonio Ferraz, Sassan Saatchi, Hamid Hamraz, Jonathan Williams 0003, David Coomes, Alexandre Piboule, Grégoire Vincent   +8 more
openaire   +6 more sources