Fig 1.
Test plots used for data collection.
Fig 2.
UAV hyperspectral imaging system.
Table 1.
Statistical characteristics of chlorophyll content in japonica rice in test plots.
Fig 3.
Global sensitivity analysis of the input parameters in the PROSPECT model.
Fig 4.
Noise reduction of hyperspectral information smoothing.
Fig 5.
Single band correlation analysis results.
Fig 6.
Selection of characteristic bands of SPA in the canopy layer of japonica rice.
Table 2.
Orthogonal array test for PSO-ELM.
Table 3.
Analysis of the PSO-ELM orthogonal array test results.
Fig 7.
Inversion results of japonica rice canopy chlorophyll content.