Table 1. Quantitative characterization of common and image-derived indices.
Index | Wavelengths/bands | DB | CB | R2 |
---|---|---|---|---|
Image guided indices (ratiometric) | ||||
Image-guided index | 1529 nm/1416 nm | 5.128 | 0.006 | 0.970 |
SRC | 1459 nm/1129 nm | 1.142 | 0.319 | 0.964 |
Weber (WC) | (1459–1129 nm)/1129 nm | 1.142 | 0.319 | 0.964 |
Michelson (MC) | (1460 nm–1421 nm)/(1460 nm + 1421 nm) | 0.239 | 0.788 | 0.989 |
Band indices | ||||
Narrow band* | From 1300 to 1500 nm | 0.777 | 0.460 | 0.982 |
Broadband* | From 800 to 1600 nm | 0.286 | 0.751 | 0.970 |
Single band* | 1416 nm | 0.318 | 0.728 | 0.970 |
Single band* | 1529 nm | 0.192 | 0.826 | 0.985 |
Traditional indices (bandratios) | ||||
WBI | 900 nm/970 nm | 0.181 | 0.834 | 0.998 |
MSI | 1599 nm/819 nm | 0.846 | 0.429 | 0.972 |
NDWI | (857 nm–1241 nm)/(857 nm + 1241 nm) | 0.500 | 0.607 | 0.989 |
DB - Bhattacharyya distance, CB - Bhattacharyya coefficient, R2 –goodness of fit of the bimodal Gaussian distribution, *Referenced to light intensity.