The result is a ranked list, which shows the information content for all possible combinations (20). The list is ranked from the best combination down to the combination containing less information. From this the user can derive which band combinations are interesting to analyse.
Calculation (after CHAVEZ et al. 1984):
Sum of Standard deviations of 3 bands OIF = ------------------------------------------------ Sum of ABS(correlation coefficients of 3 bands)
Ref.: Jensen: Introductory digital image processing 1996, p.98 ISBN 0-13-205840-5