Level 2 Help for SRCHEDGE

The input VICAR halfword image must be black and white and have a darker and
a lighter side.

The output image will the same as the input image except that the
transition edge points will be highlighted with a DN of 20,000.

This variable designates the number of samples to skip while incrementing
through each input image line to find the transition point form dark to
light or light to dark.

This variable designates the number of lines to skip while incrementing
through each input image column to find the transition point form dark to
light or light to dark.

This variable designates the number of lines and samples to skip while
incrementing through the input image to calculate its average DN value.

Indicates whether the entire image or a portion of the image
(indicated by SMALLSIZE) will be searched.  When SMALL is set to 
'SMALL', SMALLSIZE is used.  When SMALL is set to 'NORMAL', 
SMALLSIZE is ignored.

Indicates the portion of the image which will be searched.
SMALLSIZE must be smaller than the input image size.

Another means to shorten the search area of the image.  For example, when
CUT is set to 100 the top-most and bottom-most 100 lines, as well as the
left-most and right-most 100 samples, are ignored in the search for the
transition edge.

The angle in degrees of the transition edge is output to this parameter.
The user must declare a variable of type real to receive this value.