Research on Leaf Area Index Inversion Based on LESS 3D Radiative Transfer Model and Machine Learning Algorithms
Abstract
:1. Introduction
2. Materials and Methods
2.1. Research Area
2.2. Data Acquisition
2.2.1. Sample Plot Design and Filed Data Acquisition
2.2.2. Remote Sensing Image Acquisition
2.2.3. LESS Three-Dimensional Radiative Transfer Model
2.3. Machine Learning Algorithm
2.4. Canopy Reflectance Data Simulation
2.5. Multi-Spectral Reflectance Data Conversion
3. Results
3.1. Random Forest Algorithm Training and Testing
3.2. BP Neural Network Training and Testing
3.3. XGBoost Algorithm Training and Testing
3.4. Verification Using Measured LAI Values
3.5. LAI Inversion Spatial Distribution Maps
4. Discussion
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameter | Value Size (Range) | Unit |
---|---|---|
Structure coefficient (N) | 1.5 | |
Water thickness (Cw) | 0.015 | cm |
Chlorophyll (Cab) | 30, 50, 70 | μg·cm−2 |
Dry matter (Cm) | 0.012 | g·cm−2 |
Blade size | 0.01 | m2 |
Tree height (H) | 9.5, 12, 14 | m |
Coronal height | 3.5, 5, 6 | m |
East-west crown width | 3, 4.5, 5 | m |
North-south crown width | 2, 4, 5.5 | m |
Sun zenith angle SZA | 43.756 | |
Sun azimuth angle SAA | 164.272 | |
Skylight proportion | Calculated using the 6s model | |
Soil reflectance | Calculated using the Gsv model | |
Simulated band | 400–900 (in steps of 1) | nm |
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Jiang, Y.; Zhang, Z.; He, H.; Zhang, X.; Feng, F.; Xu, C.; Zhang, M.; Lafortezza, R. Research on Leaf Area Index Inversion Based on LESS 3D Radiative Transfer Model and Machine Learning Algorithms. Remote Sens. 2024, 16, 3627. https://doi.org/10.3390/rs16193627
Jiang Y, Zhang Z, He H, Zhang X, Feng F, Xu C, Zhang M, Lafortezza R. Research on Leaf Area Index Inversion Based on LESS 3D Radiative Transfer Model and Machine Learning Algorithms. Remote Sensing. 2024; 16(19):3627. https://doi.org/10.3390/rs16193627
Chicago/Turabian StyleJiang, Yunyang, Zixuan Zhang, Huaijiang He, Xinna Zhang, Fei Feng, Chengyang Xu, Mingjie Zhang, and Raffaele Lafortezza. 2024. "Research on Leaf Area Index Inversion Based on LESS 3D Radiative Transfer Model and Machine Learning Algorithms" Remote Sensing 16, no. 19: 3627. https://doi.org/10.3390/rs16193627
APA StyleJiang, Y., Zhang, Z., He, H., Zhang, X., Feng, F., Xu, C., Zhang, M., & Lafortezza, R. (2024). Research on Leaf Area Index Inversion Based on LESS 3D Radiative Transfer Model and Machine Learning Algorithms. Remote Sensing, 16(19), 3627. https://doi.org/10.3390/rs16193627