Table 5 Red Edge parameters extracted from hyperspectral data
Type | Parameters | Description | Type | Parameters | Description |
|---|---|---|---|---|---|
Based on original spectrum | Rg | The maximum reflectance in the wavelength range of 510–560 nm | Based on first derivative | dλb | The first order differential value corresponding to λb |
Ro | The minimum reflectance in the wavelength range of 640–680 nm | dλr | The first order differential value corresponding to λr | ||
λg | Wavelength position of Rg | SDb | The area surrounded by the first-order differential spectrum in the range of 490–530 nm | ||
λo | Wavelength position of Ro | SDr | The area surrounded by the first-order differential spectrum in the range of 680–760 nm | ||
Sg | Skewness of reflectance in the wavelength range of 510–560 nm | SDr–SDb | SDr–SDb | ||
Kg | Kurtosis of reflectance in the wavelength range of 510–560 nm | Others | Lwidth | Width at half depth of red band absorption | |
Sr | Skewness of reflectance in the range of 680–760 nm | Depth672 | Absorption depth at 672 nm | ||
Kr | Kurtosis of reflectance in the wavelength range of 680–760 nm | Depth560 | Absorption depth at 560 nm | ||
Based on first derivative | λb | Wavelength position of the maximum first derivative of reflectance between 490 and 530 nm | GH | Height of green peak | |
λr | Wavelength position of the maximum first derivative of reflectance between 680 and 760 nm | RD | Depth of red band absorption |