BA

## Regional Remote Sensing Centre-Central, NAGPUR

BAND COMBINATION: Image Arithmetic

This module facilitate to do basic arithmatic using various bands of one or more image(s). Thus the outcome is single value which signifies the specific meaning. Various indices like NDVI, NWDI, SVI .etc are examples of band combination analysis.

Basic requiremetns are :

· First input file which is essential .

· Second input file which is optional.

· An expression in terms of decimal coefficients, band no and mathematical operators.

· Precedence order has to maintained using (, ) operators

· Band should be specifies as FB1, SB2 which means band one of first file, band two of second file.

e.g. Suppose we want to express NDVI equation then it can be expressed as

(FB3-FB2)/(FB3+FB2)