Sky-canopy border length, exposure and thresholding influence accuracy of hemispherical photography for complex plant canopies [PDF]
Botanical Studies, 2018 Background Hemispherical photography (HP) is a popular method to estimate canopy structure and understorey light environment, which analyses photographs acquired with wide view-angle lens (i.e. fisheye lens).
Guo-Zhang M. Song +3 more
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Characterizing Olive Grove Canopies by Means of Ground-Based Hemispherical Photography and Spaceborne RADAR Data [PDF]
Sensors, 2011 One of the main strengths of active microwave remote sensing, in relation to frequency, is its capacity to penetrate vegetation canopies and reach the ground surface, so that information can be drawn about the vegetation and hydrological properties of ...
Carmen Morillo +4 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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Optimizing forest canopy structure retrieval from smartphone‐based hemispherical photography [PDF]
Methods in Ecology and Evolution, 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
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Digital hemispherical photography for estimating forest canopy properties: current controversies and opportunities [PDF]
iForest - Biogeosciences and Forestry, 2012 Hemispherical photography has been used since the 1960s in forest ecology. Nevertheless, specific constraints related to film cameras have progressively prevented widespread adoption of this photographic method.
Chianucci F, Cutini A
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Tracking the long-term structure changes of a mature deciduous broadleaf forest stand using digital hemispherical photography [PDF]
Metsanduslikud Uurimused, 2019 Hemispherical photography provides permanent records of forest canopy structure. We analysed digital hemispherical images taken during the period of 2007–2018 in a mature silver birch stand located in Järvselja, Estonia.
Lang Mait, Pisek Jan
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A note on estimating canopy cover from digital cover and hemispherical photography [PDF]
Silva Fennica, 2016 Fast and accurate estimates of canopy cover are central for a wide range of forestry studies. As direct measurements are impractical, indirect optical methods have often been used in forestry to estimate canopy cover. In this paper the accuracy of canopy
Chianucci, Francesco
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Adjusting line quantum sensing to improve leaf area index measurements and estimations in forests [PDF]
MethodsX, 2022 Rapid and reliable estimation of leaf area index (LAI), a crucial parameter in process-based models of vegetation cover response, is important in ecological studies. The Beer-Lambert law is widely used to calculate forest LAI, but data collection methods
Guyen Battuvshin, Lucas Menzel
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A Review of the Application of Hemispherical Photography in Urban Outdoor Thermal Comfort Studies [PDF]
BuildingsThermal comfort studies are paramount in enhancing future urban living conditions, and hemispherical photography has emerged as a widely employed field measurement technique in outdoor thermal comfort research.
Lei Sima +4 more
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Rapid assessment of forest canopy and light regime using smartphone hemispherical photography. [PDF]
Ecol Evol, 2017 Bianchi S +3 more
europepmc +3 more sources