Quantitative digital imaging of banana growth suppression by plant parasitic nematodes. [PDF]
PLoS ONE, 2012 A digital camera fitted with a hemispherical lens was used to generate canopy leaf area index (LAI) values for a banana (Musa spp.) field trial with the aim of establishing a method for monitoring stresses on tall crop plants.
Hugh Roderick +4 more
doaj +1 more source
Optimizing forest canopy structure retrieval from smartphone‐based hemispherical photography [PDF]
, 2023 Hemispherical photography (HP) is a long‐standing tool for forest canopy characterization. Currently, there are low‐cost fisheye lenses to convert smartphones into highly portable HP equipment (smartphone‐based HP, hereafter SHP).
Gastón Mauro Díaz +1 more
core +1 more source
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
doaj +1 more source
Remote Sensing, 2009 Digital cover photography (DCP) is a high resolution, vertical field-of-view method for ground-based estimation of forest metrics, and has advantages over fisheye sensors owing to its ease of application and high accuracy. We conducted the first thorough
Craig Macfarlane, Burak Pekin
doaj +1 more source
Model-based local thresholding for canopy hemispherical photography [PDF]
, 2018 Canopy hemispherical photography (HP) is widely used to estimate forest structural variables. To achieve good results with HP, a classification algorithm is needed to produce binary images to accurately estimate the gap fraction. Our aim was to develop a
Lencinas, José Daniel +3 more
core +1 more source
LAI estimation by direct and indirect methods in Scots pine stands in Northern Steppe of Ukraine
Journal of Forest Science, 2018 Leaf area index (LAI) of Scots pine (Pinus sylvestris Linnaeus) in the Northern Steppe of Ukraine was estimated. LAI estimated directly (LAI d, destructive sampling) was compared with LAI determined by digital hemispherical photography (indirect method ...
Viktoriia LOVYNSKA +4 more
doaj +1 more source
Remote Sensing, 2023 Quantification of vegetation biophysical variables such as leaf area index (LAI), fractional vegetation cover (fCover), and biomass are among the key factors across hydrological, agricultural, and irrigation management studies. The present study proposes
Elahe Akbari +6 more
doaj +1 more source
AN INTERCOMPARISON OF PASSIVE TERRESTRIAL REMOTE SENSING TECHNOLOGIES TO DERIVE LAI AND CANOPY COVER METRICS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012 Forest indicators such as Leaf Area Index (LAI) and vegetation cover type are recognised as Essential Climate Variables (ECVs) which support the '…research, modelling, analysis, and capacity-building activities…' requirements of the United Nations ...
W. L. Woodgate
doaj +1 more source
A New Method for Forest Canopy Hemispherical Photography Segmentation Based on Deep Learning
, 2020 Research Highlights: This paper proposes a new method for hemispherical forest canopy image segmentation. The method is based on a deep learning methodology and provides a robust and fully automatic technique for the segmentation of forest canopy ...
Jingzhe Zhang +7 more
core +1 more source
plant sampling & hemispherical photography
, 2014 Grid based distribution maps (1 x 1m) and results of hemispherical photography based light measurements for the six surveyed populations of Viola elatior.
Benjamin Schulz (3258126) +5 more
core +1 more source