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Retrieving Canopy Clumping Index from Terrestrial Laser Scanning Data
2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021The information about tree canopy structure is crucial for better understanding the process of radiation propagation. Clumping index (CI) describes the nonrandom distribution of foliage in canopy. Terrestrial laser scanning (TLS) has great advantages in obtaining high spatial resolution point cloud.
Yifan Xu, Sen Li, Shihua Li
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Estimation of Mixed Forests Clumping Index and Its Spatial Heterogeneity Study
2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021Foliage Clumping Index (CI) is an important structural parameter within vegetation canopy, and current satellite-borne CI products mainly retrieved by using the linear relationship between the CI and the normalized difference between hotspot and dark spot (NDHD), while there is no directly model to calculate the CI of mixed forest.
Rui Xie +9 more
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The computation of foliage clumping index using hemispherical photography
Agricultural and Forest Meteorology, 2009Hemispherical photography (HP) is extensively used for both canopy architecture such as leaf area index (LAI), and solar radiation regime determinations under forest canopies. This is done mainly by assuming that foliage elements occur in a spatially random manner.
Alemu Gonsamo, Petri Pellikka
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Global clumping index map derived from modis BRDF products
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011In this study, we show for the first time a global Clumping Index (CI) map at 500 m resolution derived using the Bidirectional Reflectance Distribution Function (BRDF) product from Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the hotspot calculated from the MODIS BRDF product is underestimated in comparison with POLarization and
Liming He +4 more
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Estimation of vegetation clumping index using MODIS BRDF data
International Journal of Remote Sensing, 2011The foliage clumping index quantifies the degree of the deviation of leaf spatial distribution in the canopy from the random case. It is of comparable importance for ecological models as the leaf area index for quantifying radiation interception and distribution in plant canopies.
Jan Pisek, Jing Ming Chen, Tiit Nilson
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Estimating clumping index of woody canopy with terrestrial lidar data
2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2017The terrestrial LiDAR technology can provide canopy structural information implicitly contained within point clouds data and it is a popular tool, particularly in forestry applications. Clumping index characterizes the spatial distribution of the canopy and quantifies the degree of the real distribution deviate from the random case.
Shihua Li +4 more
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Calculation of clumping index of mixed pixel and scale analysis
2011 IEEE International Geoscience and Remote Sensing Symposium, 2011Clumping index is an important vegetation structure parameter to describe the foliage clumping in canopy quantitatively. It is defined as the ratio of the effective leaf area index to the true leaf area index. In previous studies, it is generally considerate that cluster of canopy and below canopy scale in pure pixel.
Qingmiao Ma +3 more
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