Why does EVI need blue, C1, C2, and L?

maybe veg
  • Blue band via C₁, C₂ — corrects for atmospheric aerosol scattering.
  • L term — soil-adjustment factor; damps bare-soil brightness.
  • (1 + L) multiplier — rescales output after soil correction.

Result: EVI doesn’t saturate in high-biomass canopies the way NDVI does.