Usage Example - Operation: MA


.OPERATION MA ;   Mask - image using a circular mask
.INPUT FILE NAME ip_001 ;   Input file name
.OUTPUT FILE NAME ma_001 ;   New file name
.OUTER & INNER RADII 12,0 ;   Radii
.(D)ISK, (C)OSINE, (G)AUSSIAN EDGE OR (T)RUE GAUSSIAN D ;  
.(A)V, (P)REC AV, (C)IRCUMF, OR (E)XTERNAL A ;  

INPUT OUTPUT
ip_001 ma_001