Evaluating Sentinel-1A datasets for rice leaf area index estimation based on machine learning regression models

2020 ◽  
pp. 1-12 ◽  
Author(s):  
Lamin R. Mansaray ◽  
Fumin Wang ◽  
Adam S. Kanu ◽  
Lingbo Yang
Keyword(s):  
Machine Learning ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Regression Models ◽  
Area Index ◽  
Rice Leaf ◽  
Index Estimation

scholarly journals Comparison of LiDAR-based Models for True Leaf Area Index and Effective Leaf Area Index Estimation in Young Beech Forests

2020 ◽  
Vol 68 (3) ◽  
pp. 559-566
Author(s):  
Zdeněk Patočka ◽  
Kateřina Novosadová ◽  
Pavel Haninec ◽  
Radek Pokorný ◽  
Tomáš Mikita ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Regression Models ◽  
Canopy Structure ◽  
Optical Methods ◽  
Distribution Model ◽  
Area Index ◽  
Index Estimation ◽  
Effective Leaf Area Index

The leaf area index (LAI) is one of the most common leaf area and canopy structure quantifiers. Direct LAI measurement and determination of canopy characteristics in larger areas is unrealistic due to the large number of measurements required to create the distribution model. This study compares the regression models for the ALS-based calculation of LAI, where the effective leaf area index (eLAI) determined by optical methods and the LAI determined by the direct destructive method and developed by allometric equations were used as response variables. LiDAR metrics and the laser penetration index (LPI) were used as predictor variables. The regression models of LPI and eLAI dependency and the LiDAR metrics and eLAI dependency showed coefficients of determination (R2) of 0.75 and 0.92, respectively; the advantage of using LiDAR metrics for more accurate modelling is demonstrated. The model for true LAI estimation reached a R2 of 0.88.

scholarly journals Leaf area index estimation using top-of-canopy airborne RGB images

2021 ◽  
Vol 96 ◽  
pp. 102282
Author(s):  
Rahul Raj ◽  
Jeffrey P. Walker ◽  
Rohit Pingale ◽  
Rohit Nandan ◽  
Balaji Naik ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Area Index ◽  
Rgb Images ◽  
Index Estimation

Drone-Based Sensing for Leaf Area Index Estimation of Citrus Canopy

2020 ◽  
pp. 79-89 ◽  
Author(s):  
Rahul Raj ◽  
Saurabh Suradhaniwar ◽  
Rohit Nandan ◽  
Adinarayana Jagarlapudi ◽  
Jeffrey Walker
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Area Index ◽  
Index Estimation
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