MIDAS provides a command
PLOT/CONTOURto produce contour plots on the graphics device from data binned to an image. In case contours are to be plotted for a certain confidence level of source counts above background the following procedure is recommended to be used.
Load the image, select and extract a subimage by the
SELECT/CURSOR command, apply the STATISTIC/IMAGE
command on the subimage.
The mean background counts are determined from the keyword
OUTPUTR(3), the 1 
contour above the background
from the keyword OUTPUTR(4).
2,3,4,5 
contours above the background
can then be drawn with the command
PLOT/CONTOUR image ? ? {OUTPUTR(3)}+2.*{OUTPUTR(4)},{OUTPUTR(3)}-
+3.*{OUTPUTR(4)},{OUTPUTR(3)}+4.*{OUTPUTR(4)},{OUTPUTR(3)}+5.*{OUTPUTR(4)}
Contours can also be overlaid with the command ADD/CONTOUR,
see section
5.2.39.