Results 181 to 190 of about 510 (196)

Study on LAI Estimation of Broadleaf Forests in Arid Areas Using Digital Hemispherical Photography - A Case Study in the Tarim River Basin, China

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.
Cun Chang
exaly   +2 more sources

Evaluation and Validation of The MODIS LAI Algorithm with Digital Hemispherical Photography at Bhitar Kanika Mangrove Forest, India

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
Somnath Paramanik, Mukunda Dev Behera, Bimal K. Bhattacharya, S. K. Tripathi   +3 more
openaire   +2 more sources

Symbolic regression-based allometric model development of a mangrove forest LAI using structural variables and digital hemispherical photography

Applied Geography, 2022
The leaf area index (LAI) serves as a proxy to understand the dynamics of plant productivity, energy balance, and gas exchange. Cost-effective and accurate estimation of LAI is essential for under-assessed carbon-rich tropical forests, e.g., mangroves.
S. Paramanik, M.D. Behera, J. Dash
openaire   +2 more sources

Automatic thresholding for digital hemispherical photography

Canadian Journal of Forest Research, 2004
This paper proposes an automatic thresholding method for the discrimination of sky and canopy elements in color hemispherical photographs taken with a digital camera (Nikon Coolpix 950). The exposures for photography were principally determined on the basis of zenith luminance. DIFphoto, which is diffuse transmittance calculated from the hemispherical
openaire   +1 more source

Comparison of Image Segmentation Methods Based on Digital Hemisphere Photography

IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023
Tianxin Duan, Yunping Chen, Zhentao Gao, Shuaifeng Jiao, Yuanlei Chen, Yuan Sun   +5 more
openaire   +1 more source

MEF-DHP: Digital Hemispheric Photography Method Based On Multi-Exposure Fusion

IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023
Shuaifeng Jiao, Yunping Chen, Yuanlei Cheng, Tianxin Duan, Zhentao Gao, Yuan Sun, Fang Huang 0001   +6 more
openaire   +1 more source

An Improved Method for Estimating Clumping Index by Digital Hemispheric Photography With Field Measurements

IEEE Geoscience and Remote Sensing Letters, 2022
Yidong Tong, Ziti Jiao, Xiaoning Zhang 0001, Siyang Yin, Jing Guo 0006   +4 more
openaire   +1 more source

Research on the Optimal Exposure Time of Digital Hemispheric Photography Method Based on Light Intensity

IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium, 2022
Shuaifeng Jiao, Yunping Chen, Haichang Wei, Yuanlei Cheng, Yan Chen 0003, Chaoming Luo   +5 more
openaire   +1 more source

Sampling scale effects of vegetation apparent clumping index obtained by digital hemispherical photography

National Remote Sensing Bulletin, 2023
Yidong TONG, Ziti JIAO, Siyang YIN, Xiaoning ZHANG, Lei CUI, Rui XIE, Jing GUO, Sijie LI, Zidong ZHU   +8 more
openaire   +1 more source

Improving methods to predict aboveground biomass of Pinus sylvestris in urban forest using UFB model, LiDAR and digital hemispherical photography

Urban Forestry & Urban Greening, 2023
Ihor Kozak, Mikhail Popov, Igor Semko, Myroslava Mylenka, Iryna Kozak-Balaniuk   +4 more
openaire   +1 more source