Documentation on imcmp

Task: imcmp
Purpose: Compare two images
Categories: map analysis

       IMCMP is a MIRIAD task to compare two images. The maps must have
        the same dimensions.
        The two images are compared on a pixel by pixel basis, within a
        user defined region.

Key: in1
       The first input image.  No default

Key: in2
       The second input image.  No default

Key: region
        Region to select data to compare. Only pixels where both input 
        maps were unmasked will be compared. Only a rectangular region
        of interest is supported.

Key: cut
       Cutoff applied to data. By default not used, all data used.

Key: tol
       Tolerance when comparing the absolute difference between the two
       maps on pixel by pixel basis. Default: 0

Key: device
       PGPLOT Plotting device. Default: no plot.

Key: limx
        Minimum and maximum for plotting the pixel values of image 1.
       Default: autoscaling.

Key: limy
        Minimum and maximum for plotting the pixel values of image 2
       Default: autoscaling.

Key: log
        File in which to write the data (as two columns). 
        Default: no logfile.