The AVI operator algorithm computes the Advanced Vegetation Index from a given product.

The AVI results from the following equation:

AVI = pow(N * (1.0 - R) * (N - R) , 1.0 / 3.0)

, where:

The bands are:

- R is the Red band
- N is the NIR band

Also the processor computes an additional flags band called 'avi_flags' with the following bit coding:

Bit Position	Description
Bit 0	The computed value for AVI is NAN or is Infinite
Bit 1	The computed value for AVI is less than -1 (minus one)
Bit 2	The computed value for AVI is greater than 1 (one)