Results 11 to 20 of about 5,471 (263)
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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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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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, 2020 Estimating leaf area index (LAI) and assessing spatial variation in LAI across a landscape is crucial to many ecological studies. Several direct and indirect methods of LAI estimation have been developed and compared; however, many of these methods are ...
Tamara E. Rudic +2 more
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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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Potential of Automated Digital Hemispherical Photography and Wireless Quantum Sensors for Routine Canopy Monitoring and Satellite Product Validation [PDF]
2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021 To better characterize the temporal dynamics of vegetation biophysical variables, a variety of automated in situ measurement techniques have been developed in recent years. In this study, we investigated automated digital hemispherical photography (DHP) and wireless quantum sensors, which were installed at two sites under the Copernicus Ground Based ...
Brown, Luke +14 more
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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
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TRACKING FOREST AND OPEN AREA EFFECTS ON SNOW ACCUMULATION BY UNMANNED AERIAL VEHICLE PHOTOGRAMMETRY [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 Airborne digital photogrammetry is undergoing a renaissance. The availability of low-cost Unmanned Aerial Vehicle (UAV) platforms well adopted for digital photography and progress in software development now gives rise to apply this technique to ...
T. Lendzioch, J. Langhammer, M. Jenicek
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iForest - Biogeosciences and Forestry, 2014 Proximal sensing methods using digital photography have gained wide acceptance for describing and quantifying canopy properties. Digital hemispherical photography (DHP) is the most widely used photographic technique for canopy description.
Chianucci F, Chiavetta U, Cutini A
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Rainfall interception by two deciduous Mediterranean forests of contrasting stature in Slovenia [PDF]
, 2008 Measurements of precipitation above the canopy, throughfall and stemflow were\ud made on the south and north-facing slopes of a deciduous forest on the experimental\ud watershed of the Dragonja river in SW Slovenia.
Brilly, Mitja +2 more
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