Results 61 to 70 of about 16,908 (163)

A Weighted SVM-Based Approach to Tree Species Classification at Individual Tree Crown Level Using LiDAR Data

Remote Sensing, 2019
Tree species classification at individual tree crowns (ITCs) level, using remote-sensing data, requires the availability of a sufficient number of reliable reference samples (i.e., training samples) to be used in the learning phase of the classifier.
Hoang Minh Nguyen, Begüm Demir, Michele Dalponte   +2 more
openaire   +4 more sources

Individual-Tree Segmentation from UAV–LiDAR Data Using a Region-Growing Segmentation and Supervoxel-Weighted Fuzzy Clustering Approach

Remote Sensing
Accurate individual-tree segmentation is essential for precision forestry. In previous studies, the canopy height model-based method was convenient to process, but its performance was limited owing to the loss of 3D information, and point-based methods ...
Yuwen Fu, Yifang Niu, Li Wang, Wang Li
doaj   +1 more source

Comparing Deep Learning and MCWST Approaches for Individual Tree Crown Segmentation [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Abstract. Accurate segmentation of individual tree crowns (ITC) segmentation is essential for investigating tree-level based growth trends and assessing tree vitality. ITC segmentation using remote sensing data faces challenges due to crown heterogeneity, overlapping crowns and data quality. Currently, both classical and deep learning methods have been
W. Fan, J. Tian, J. Tian, J. Troles, M. Döllerer, M. Kindu, T. Knoke   +6 more
openaire   +3 more sources

Unsupervised individual tree crown detection in high-resolution satellite imagery

Journal of Applied Remote Sensing, 2016
Rapidly and accurately detecting individual tree crowns in satellite imagery is a critical need for monitoring and characterizing forest resources. We present a two-stage semiautomated approach for detecting individual tree crowns using high spatial resolution (0.6 m) satellite imagery.
Alexei N. Skurikhin, Nate G. McDowell, Richard S. Middleton   +2 more
openaire   +2 more sources

Improving individual tree crown volume estimation using high-accuracy boundary fitting based on stratified polar coordinate conversion with airborne laser scanning data

Geo-spatial Information Science
Aiming at the shortcomings such as low accuracy and poor universality of the current LiDAR method for calculating the crown volume of an individual tree, the study presents a stratified polar coordinate conversion (SPCC) algorithm for estimating the ...
Jianpeng Zhang, Jinliang Wang, Weifeng Ma, Yuncheng Deng, Jiya Pan, Bangjin Yi, Cheng Wang   +6 more
doaj   +1 more source

A multi-task collaborative method for individual tree segmentation and multi-dimensional attribute extraction in mountainous areas using deep learning technologies

International Journal of Applied Earth Observations and Geoinformation
Accurate mapping and monitoring of forest structure and composition in complex mountainous regions remain challenging because of crown occlusion, crown adhesion, and pronounced topographic variation.
Guangbin Lei, Ainong Li, Jinhu Bian, Zhengjian Zhang, Xiaohan Lin, Xi Nan, Amin Naboureh, Yulan Chen, Yi Deng   +8 more
doaj   +1 more source

Individual Tree Segmentation Based on Seed Points Detected by an Adaptive Crown Shaped Algorithm Using UAV-LiDAR Data

Remote Sensing
Unmanned aerial vehicle–light detection and ranging (UAV-LiDAR) provides a convenient and economical means of forest data acquisition that can penetrate canopy gaps to obtain abundant ground information, offering huge potential in forest inventory ...
Jiao Yu, Lei Lei, Zhenhong Li
doaj   +1 more source

Integrating species functional and architectural traits for improving crown width prediction in subtropical multispecies forests using nonlinear hierarchical models

Ecological Informatics
Crown width (CW) is a critical predictor of individual tree development and forest ecosystem function. Effective CW models are well established for plantations and structurally simpler forests, yet their applicability to diverse, species-rich natural ...
Canming He, Xianglin Tian, Hongxiang Wang   +2 more
doaj   +1 more source

A Crown-Following Approach to the Automatic Delineation of Individual Tree Crowns in High Spatial Resolution Aerial Images

Canadian Journal of Remote Sensing, 1995
RESUMELa disponibilite d'images numeriques multispectrales aeriennes georeferencees de haute resolution spatiale, telles qu'obtenues par le MEIS-II, pourrait conduire a de nouvelles facons d'acquerir les inventaires d'amenagement forestier. Le potentiel d'une interpretation humaine assistee par ordinateur et faite a l'ecran est un bon exemple des ...
openaire   +1 more source

Semi-Supervised Multimodal Individual Tree Crown Delineation via Crown Vertical Semantic Distillation With Selective Coupling

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Trees play a pivotal role in industrial processes by providing raw materials, such as timber and paper, while simultaneously contributing to sustainable practices through carbon dioxide sequestration and biodiversity support.
Xingpei Zhong, Zaorui Song, Xijian Fan, Tardi Tjahjadi, Qiaolin Ye, Liyong Fu   +5 more
doaj   +1 more source