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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Comparative Evaluation of Algorithms for Leaf Area Index Estimation from Digital Hemispherical Photography through Virtual Forests [PDF]
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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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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Agricultural and Forest Meteorology, 2020 Abstract In recent years, digital repeat photography has received increasing attention as an inexpensive means by which seasonal changes in vegetation canopies can be monitored. Offering automation and an increased measurement frequency, colour indices derived from above-canopy digital repeat photography have proven a popular alternative to ...
Luke A Brown +2 more
exaly +5 more sources
Influence of levelling technique on the retrieval of canopy structural parameters from digital hemispherical photography [PDF]
Agricultural and Forest Meteorology, 2017 Digital hemispherical photography is a simple, non-destructive method for estimating canopy biophysical parameters for ecological applications and validation of remote sensing products. Determination of optimum and repeatable acquisition procedures is well documented in the literature but so far this has not focused on evaluating the levelling ...
Kim Calders +2 more
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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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PhenoStras2022: A 2022 smartphone-based image and field phenology dataset for monitoring urban trees in Strasbourg, FranceEaSyData [PDF]
Data in BriefUrban trees provide critical ecosystem services but remain vulnerable to climate change and urban environmental stresses. To improve understanding of their phenological dynamics and support reproducible urban vegetation monitoring, PhenoStras2022 is ...
Clément Bressant +2 more
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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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Metsanduslikud Uurimused, 2023 Environmental monitoring networks such as the Integrated Carbon Observation System (ICOS) in Europe, the National Ecological Observatory Network (NEON) in the U.S., or the Terrestrial Ecosystem Research Network (TERN) in Australia deploy different ...
Kaha Mihkel +3 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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