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Agricultural and Forest Meteorology, 2014
Digital hemispherical photography (DHP) has been widely used to estimate the plant area index (PAI, a surrogate for leaf area index, LAI) for terrestrial vegetation. However, DHP has not been applied in aquatic environment fields for submerged vegetation, where only a few methods are available for LAI measurement.
Dehua Zhao +4 more
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Digital hemispherical photography (DHP) has been widely used to estimate the plant area index (PAI, a surrogate for leaf area index, LAI) for terrestrial vegetation. However, DHP has not been applied in aquatic environment fields for submerged vegetation, where only a few methods are available for LAI measurement.
Dehua Zhao +4 more
openaire +1 more source
Agricultural and Forest Meteorology, 2004
Digital hemispherical photography is an effective device for estimating the light environment beneath a forest canopy. In this study, the effects of different image quality, size and camera type on the light environment estimates using digital hemispherical photography were examined.
Akio Inoue +3 more
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Digital hemispherical photography is an effective device for estimating the light environment beneath a forest canopy. In this study, the effects of different image quality, size and camera type on the light environment estimates using digital hemispherical photography were examined.
Akio Inoue +3 more
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IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
Estimation of LAI is really a challenge and researchers are developing new methods to get more accurate estimation of LAI. MODIS continuously provides globally temporal LAI product and it is easily accessible for application and development purpose. But main problem is the spatial resolution (500m) where the main target features has affected due to the
Paramanik, Somnath +2 more
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Estimation of LAI is really a challenge and researchers are developing new methods to get more accurate estimation of LAI. MODIS continuously provides globally temporal LAI product and it is easily accessible for application and development purpose. But main problem is the spatial resolution (500m) where the main target features has affected due to the
Paramanik, Somnath +2 more
openaire +2 more sources
Forest Ecology and Management, 2015
Abstract Accurate estimation of seasonal leaf area index (LAI) variations is essential for predicting forest growth, but rapid and reliable methods for obtaining such estimates have rarely been reported. In this study, direct measurements of LAI seasonal variations in deciduous broadleaf forests in China were made through leaf seasonality ...
Zhili Liu +4 more
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Abstract Accurate estimation of seasonal leaf area index (LAI) variations is essential for predicting forest growth, but rapid and reliable methods for obtaining such estimates have rarely been reported. In this study, direct measurements of LAI seasonal variations in deciduous broadleaf forests in China were made through leaf seasonality ...
Zhili Liu +4 more
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Canadian Journal of Forest Research, 2015
Optical methods have been widely used to estimate seasonal changes of the leaf area index (LAI) in forest stands because they are convenient and effective; however, their accuracy in deciduous broadleaf forests has rarely been evaluated. We estimate the seasonal changes in the LAI by combining periodic observations of leaf area variation with litter ...
Zhili Liu +4 more
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Optical methods have been widely used to estimate seasonal changes of the leaf area index (LAI) in forest stands because they are convenient and effective; however, their accuracy in deciduous broadleaf forests has rarely been evaluated. We estimate the seasonal changes in the LAI by combining periodic observations of leaf area variation with litter ...
Zhili Liu +4 more
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2009 International Conference on Environmental Science and Information Application Technology, 2009
The values of leaf area index (LAI) were optically measured with digital hemispherical photography in deciduous Populus euphratica Oliv forests in the Tarim River Basin, China, and then they are estimated and analyzed. Circular fisheye photography was compared with another alternative indirect method (cover photography) for estimating LAI.
Zhongguo Ma +3 more
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The values of leaf area index (LAI) were optically measured with digital hemispherical photography in deciduous Populus euphratica Oliv forests in the Tarim River Basin, China, and then they are estimated and analyzed. Circular fisheye photography was compared with another alternative indirect method (cover photography) for estimating LAI.
Zhongguo Ma +3 more
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Comparison of Image Segmentation Methods Based on Digital Hemisphere Photography
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023Tianxin Duan +5 more
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MEF-DHP: Digital Hemispheric Photography Method Based On Multi-Exposure Fusion
IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023Shuaifeng Jiao +6 more
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