SIPI (Structure Intensive Pigment Index)

The SIPI index maximizes sensitivity to the bulk carotenoids to chlorophyll ratio, while minimizing the impact of the variable canopy structure. It is very useful in areas with high variability in the canopy structure, or leaf area index. SIPI values range from 0 to 2, where healthy green vegetation ranges from 0.8 to 1.8.

SIPI = (800nm−445nm)/(800nm−680nm)