Results 31 to 40 of about 2,623 (238)

Ground Truthing Strategies for Automatic Tree Crown Segmentation of Mangrove Forests Along the Batangas Coastline, Philippines using High-Resolution Imagery and Deep Learning [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Mangrove forests play a critical role in protecting tropical coastlines, storing carbon, and supporting marine life, yet mapping their fine-scale canopy structure remains difficult.
J. R. Jao, J. R. Jao, J. R. Jao, J. R. Jao, A. Abenoja, M. Gonzales, E. Ladrido, W. Wu, E. Vallar, J. Bulan, J. Cadondon, J. R. Lesidan, S. Pe, M. C. Galvez, A. Beltran, A. Orbecido, M. Prasow Emond, P. Brito-Parada, Y. Plancherel   +18 more
doaj   +1 more source

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

ACCURACY ASSESSMENT OF CROWN DELINEATION METHODS FOR THE INDIVIDUAL TREES USING LIDAR DATA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Forest canopy density and height are used as variables in a number of environmental applications, including the estimation of biomass, forest extent and condition, and biodiversity.
K. T. Chang, C. Lin, Y. C. Lin, J. K. Liu   +3 more
doaj   +1 more source

Individual Tree Crown Delineation Techniques for Vegetation Management in Power Line Corridor [PDF]

2008 Digital Image Computing: Techniques and Applications, 2008
Remotely sensed, high spatial resolution images have great potential in assisting vegetation management in power line corridor. With the wide use of object-based approaches in remote sensing image analysis, individual tree crown delineation becomes a key research focus to improve the accuracy of plant information extraction.
Li, Zhengrong, Hayward, Ross, Zhang, Jinglan, Liu, Yuee   +3 more
openaire   +2 more sources

UAV-Based Characterization of Tree-Attributes and Multispectral Indices in an Uneven-Aged Mixed Conifer-Broadleaf Forest

Remote Sensing, 2022
Unmanned aerial vehicles (UAVs) have contributed considerably to forest monitoring. However, gaps in the knowledge still remain, particularly for natural forests.
Eduardo D. Vivar-Vivar, Marín Pompa-García, José A. Martínez-Rivas, Luis A. Mora-Tembre   +3 more
doaj   +1 more source

Evaluating a Weighted Ensemble of Deep Learning Models for Individual Tree Crown Delineation from LiDAR Data [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
This study investigates a weighted ensemble framework for individual tree crown (ITC) delineation using LiDAR-derived canopy height models (CHMs). Three deep learning models, Mask R-CNN, U-Net, and YOLO were first independently evaluated to establish the
D. Gaspar, B. Hu, Q. Li
doaj   +1 more source

Accuracy of LiDAR-based tree height estimation and crown recognition in a subtropical evergreen broad-leaved forest in Okinawa, Japan

Forest Systems, 2015
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.
Azita Ahmad Zawawi, Masami Shiba, Noor Janatun Naim Jemali   +2 more
doaj   +1 more source

A Novel Method for Detecting and Delineating Coppice Trees in UAV Images to Monitor Tree Decline

Remote Sensing, 2022
Monitoring tree decline in arid and semi-arid zones requires methods that can provide up-to-date and accurate information on the health status of the trees at single-tree and sample plot levels.
Marziye Ghasemi, Hooman Latifi, Mehdi Pourhashemi   +2 more
doaj   +1 more source

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source

High‐Efficiency Deep Blue Single‐Gaussian Europium(II) Emitters and Their Emitter‐Host Interactions

Advanced Functional Materials, EarlyView.
Crown‐ether ligands and carborate anions enable vacuum‐processable Eu(II) emitters with efficient single‐Gaussian deep‐blue luminescence. Combined photophysical and computational analyses reveal that excited‐electron confinement and steric shielding of the europium center jointly govern compatibility with OLED host materials, establishing molecular ...
Mahmoud Soleimani, Paulius Imbrasas, Jan‐Michael Mewes, Felix Kaden, Stephanie Anna Buchholtz, Karl Leo, Sebastian Schellhammer, Carsten Rothe, Sebastian Reineke   +8 more
wiley   +1 more source