Examples

   > IREG ANN                - define annular region
   > ISTATS                  - get stats for that region
  

   > IREG NOTCIRC            - select region outside given circle
   > IREG ADDANN             - add an annular region (mirror support?)
   > IREG ADDSLI             - add rectangular area (rib?)
   > IREG ADDSLI             - repeat for other ribs
   > IDISP                   - clear away construction lines
   > IREG SHO                - show outline of accumulated region
   > IREG EXP FILE=RIBS.ARD  - save ARD text to file
   > IEXC REG CURR           - set quality for this region
   > IREG WHO                - reselect whole image for further
                               processing
  

   > ILOAD new-image DISP \
   > IREG IMP TEXT=RIBS.ARD  - use ARD text saved earlier
   > IEXC REG CURR
  

   > IREG XSP AUTO
  

   > IREG CIR                - select area of image containing source
   > IREG ANDCON LEV=x       - select pixels within this area greater
   > IEXC REG CURR           - than given level and remove