Results 1 to 10 of about 332 (98)
Methods in Ecology and Evolution, 2023 Digital hemispherical photography (DHP) is widely used to derive forest biophysical variables including leaf, plant, and green area index (LAI, PAI and GAI), the fraction of intercepted photosynthetically active radiation (FIPAR), and the fraction of ...
Luke A. Brown +7 more
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Quantifying the Accuracy of Digital Hemispherical Photography for Leaf Area Index Estimates on Broad-Leaved Tree Species [PDF]
Sensors, 2018 Digital hemispherical photography (DHP) has been widely used to estimate leaf area index (LAI) in forestry. Despite the advancement in the processing of hemispherical images with dedicated tools, several steps are still manual and thus easily affected by
Carlo Gilardelli +3 more
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Uncrewed aircraft system spherical photography for the vertical characterization of canopy structural traits. [PDF]
New Phytol, 2022 Summary The plant area index (PAI) is a structural trait that succinctly parametrizes the foliage distribution of a canopy and is usually estimated using indirect optical techniques such as digital hemispherical photography. Critically, on‐the‐ground photographic measurements forgo the vertical variation of canopy structure which regulates the local ...
Ribas Costa VA +5 more
europepmc +2 more sources
Remote Sensing, 2021 The in situ leaf area index (LAI) measurement plays a vital role in calibrating and validating satellite LAI products. Digital hemispherical photography (DHP) is a widely used in situ forest LAI measurement method.
Jing Liu +6 more
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GIScience & Remote Sensing, 2023 Leaf area index (LAI) is defined as one half of the total green leaf area per unit ground surface area. Its vertical profile is critical for understanding the remote sensing radiative transfer processes.
Yao Wang +6 more
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Quantifying vegetation indices using terrestrial laser scanning: methodological complexities and ecological insights from a Mediterranean forest [PDF]
Biogeosciences, 2023 Accurate measurement of vegetation density metrics including plant, wood and leaf area indices (PAI, WAI and LAI) is key to monitoring and modelling carbon storage and uptake in forests.
W. R. M. Flynn +4 more
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Forest Ecosystems, 2020 Background Digital hemispherical photography (DHP) is widely used to estimate the leaf area index (LAI) of forest plots due to its advantages of high efficiency and low cost.
Jie Zou +7 more
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Remote Sensing, 2023 The leaf area index (LAI) is a crucial indicator for quantifying forest productivity and community ecological processes. Satellite remote sensing can achieve large-scale LAI monitoring, but it needs to be calibrated and validated according to the in situ
Xiansheng Xie +5 more
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Estimating Snow Depth and Leaf Area Index Based on UAV Digital Photogrammetry [PDF]
Sensors, 2019 This study presents a novel approach in the application of Unmanned Aerial Vehicle (UAV) imaging for the conjoint assessment of the snow depth and winter leaf area index (LAI), a structural property of vegetation, affecting the snow accumulation and ...
Theodora Lendzioch +2 more
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