| BITM Algorithm Specification | |
The BITM operator algorithm computes the Landsat
TM-based Brightness Index
from a given product.
The BITM results from the following equation:
BITM = pow(((pow(B , 2.0) + pow(G , 2.0) + pow(R , 2.0)) /
3.0) , 0.5)
, where:
The bands are:
- B is the Blue band
- G is the Green band
- R is the Red band
Also the processor computes an additional flags band called 'bitm_flags' with the following bit coding:
| Bit Position | Description |
|---|---|
| Bit 0 | The computed value for BITM is NAN or is Infinite |
| Bit 1 | The computed value for BITM is less than -1 (minus one) |
| Bit 2 | The computed value for BITM is greater than 1 (one) |