Perpendicular Vegetation Index (PVI)

"The Perpendicular Vegetation Index (PVI) is similar to a difference vegetation index; however, it is sensitive to atmospheric variations. When using this method to compare different images, it should only be used on images that have been atmospherically corrected.


    NIR = pixel values from the near-infrared band
    Red = pixel values from the red band
    a = slope of the soil line
    b = gradient of the soil line

This index outputs values between -1.0 and 1.0." (ESRI, 2018)


"Indices gallery". ArcGIS Pro, ESRI. 2018.
Accessed February 1, 2019.