.help imscale Aug84 proto
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NAME
imscale -- Scale an image to a specified windowed mean
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USAGE	
imscale input output mean
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PARAMETERS
.ls input
Input image to be scaled.
.le
.ls output
Output scaled image.
.le
.ls mean
Scale the output image to this mean value.
.le
.ls lower = INDEF
Lower limit of window for calculating the input image mean.  INDEF corresponds
to the minimum possible pixel value.
.le
.ls upper = INDEF
Upper limit of window for calculating the input image mean.  INDEF corresponds
to the maximum possible pixel value.
.le
.ls verbose = no
Print the calculated input and output image means.
.le
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DESCRIPTION
The mean of the \fIinput\fR image between the limits \fIlower\fR
and \fIupper\fR is computed.  The image is then scaled to the
specified output \fImean\fR.
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EXAMPLES
To scale an image to a unit mean excluding deviant points below
1000 and above 5000.

.nf
    cl> imscale calib flat 1 lower=1000 upper=5000
.fi
.endhelp