The TTVI operator algorithm computes the Transformed Triangular Vegetation Index from a given product.

The TTVI results from the following equation:

TTVI = 0.5 * ((865.0 - 740.0) * (RE3 - RE2) - (pow(N , 2) - RE2) * (783.0 - 740))

, where:

The bands are:

- RE2 is the Red Edge 2 band
- RE3 is the Red Edge 3 band
- R is the Red band
- N is the NIR band

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

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