Value Range: -1–  1

The greeness index represents the relation between the reflectance in the green channel compared to the other two visible light channels (red and blue). It is computed as (2*G-R-B)/(R+G+B). The higher the green reflection compared to the other channels the higher the lower the greeness index. A value of -1 would represents a full reflection in the green channel and no reflection in the other two channels. The illustration below shows three different examples for the calculation of greeness. The X axis represents a simplified spectrum in the range from 400 to 1,000nm. The Y axis shows the relative reflectance for each wavelength. The colored blocks represent the measurement channels of PlantEye with standard configuration.