Results 31 to 40 of about 4,122,016 (301)

A Novel Technique Based on Machine Learning for Detecting and Segmenting Trees in Very High Resolution Digital Images from Unmanned Aerial Vehicles

open access: yesDrones
The present study proposes a technique for automated tree crown detection and segmentation in digital images derived from unmanned aerial vehicles (UAVs) using a machine learning (ML) algorithm named Detectron2.
Loukas Kouvaras, George P. Petropoulos
doaj   +1 more source

Tactile and Photoelectric Sensing for Leveling Berms in Peach Tree Rows

open access: yesSmart Agricultural Technology
: Planting peach trees shallow on berms is a short-term Armillaria root rot management strategy to facilitate root collar excavation for about two years after planting.
Shubham Singh   +5 more
doaj   +1 more source

AUTOMATIC SEGMENTATION OF TREE CROWNS IN PINE FORESTS USING MASK R-CNN ON RGB IMAGERY FROM UAVS [PDF]

open access: yesВопросы лесной науки
This article presents the results of applying an improved method for automatic segmentation of RGB imagery (orthophotos) obtained using consumer-grade unmanned aerial vehicles (UAVs) based on the Mask R-CNN neural network. Preparation and post-processing
А. D. Nikitina
doaj   +1 more source

Very High Density Point Clouds from UAV Laser Scanning for Automatic Tree Stem Detection and Direct Diameter Measurement

open access: yesRemote Sensing, 2020
Three-dimensional light detection and ranging (LiDAR) point clouds acquired from unmanned aerial vehicles (UAVs) represent a relatively new type of remotely sensed data.
Karel Kuželka   +2 more
doaj   +1 more source

YOLOv4-Lite–Based Urban Plantation Tree Detection and Positioning With High-Resolution Remote Sensing Imagery

open access: yesFrontiers in Environmental Science, 2022
Automatic tree identification and position using high-resolution remote sensing images are critical for ecological garden planning, management, and large-scale environmental quality detection.
Yueyuan Zheng, Gang Wu
doaj   +1 more source

Rapid Target Detection of Fruit Trees Using UAV Imaging and Improved Light YOLOv4 Algorithm

open access: yesRemote Sensing, 2022
The detection and counting of fruit tree canopies are important for orchard management, yield estimation, and phenotypic analysis. Previous research has shown that most fruit tree canopy detection methods are based on the use of traditional computer ...
Yuchao Zhu   +5 more
doaj   +1 more source

Tree Rings and Forest Mensuration: How Can They Document Trends in Forest Health and Productivity?

open access: yes, 1986
A workshop sponsored by the National Council of the Paper Industry for Air and Stream Improvement (NCASI) and the National Vegetation Survey - EPA/USFS Forest Response Program.
University of Arizona. Laboratory of Tree-Ring Research.
core   +5 more sources

Extremal problems on detectable colorings of trees

open access: yesDiscrete Mathematics, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Henry Escuadro, Ping Zhang 0004
openaire   +2 more sources

A signal-detection analysis of fast-and-frugal trees. [PDF]

open access: yesDecision, 2011
Models of decision making are distinguished by those that aim for an optimal solution in a world that is precisely specified by a set of assumptions (a so-called "small world") and those that aim for a simple but satisfactory solution in an uncertain world where the assumptions of optimization models may not be met (a so-called "large world").
Shenghua Luan   +2 more
openaire   +5 more sources

The Efficacy Analysis of Determining the Wooded and Shrubbed Area Based on Archival Aerial Imagery Using Texture Analysis

open access: yesISPRS International Journal of Geo-Information, 2019
Open areas, along with their non-forest vegetation, are often threatened by secondary succession, which causes deterioration of biodiversity and the habitat’s conservation status.
Przemysław Kupidura   +3 more
doaj   +1 more source

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