.LP
The size of the image displayed is limited to 400x400. If the input image
is larger than 400x400, then a small pan box will appear. To move to a
different location in the image, use the mouse to move the rectangle in
the pan box. To move the rectangle put the mouse cursor in the rectangle
in the pan box and hold down the left mouse button. Release the mouse
button when you have found the desired image location.
.LP
Obviously, you must input a source image before using the \fIwarpimage\fP
program.  Fill in the filename of the desired image, and hit <cr>.  The 
contents of the source image and the default zoom window for the source image
will be immediately updated.
.SH
Input Target Image
.LP
If you are using the Source And Target Tiepoint Mode (See "Operations" for
more details), you must input a target image before using the 
\fIwarpimage\fP program.  Fill in the filename of the desired image, 
and hit <cr>.  The contents of the target image and the default 
zoom window for the target image will be immediately updated.
.SH
Input Tiepoints
.LP
This field takes the basename of the images containing the source and
target tiepoints. The files that are read in are:
.IP "basename.src:" 15
The tiepoints for the source image
.IP "basename.tgt:"
The tiepoints for the target image
.LP
Note, both the *.src and *.tgt images must contain the same number of
tiepoints.
.SH 
Output Tiepoints
.LP
This field takes the basename of a file to output the tiepoints to. The
tiepoint files generated are:
.IP "basename.src" 15
The source VIFF image tiepoints.
.IP "basename.tgt:"
The target VIFF image tiepoints.
.IP "basename.asc:"
The source and target tiepoints in an ascii file for easy viewing.
.LP
The basename.src and basename.tgt images may then be fed into 
\fBvbilinco\fP to compute the 2nd order coefficients, or \fBvpolyco\fP
to compute higher order coefficients.
.SH
Output Coefficients
.LP
Output coefficients will take the current tiepoints specified and
compute the 2nd order coefficients that vwarp will used to warp
the image with. This field takes a basename and output the following files:
.IP "basename.x:" 15
The x coefficients
.IP "basename.y:"
The y coefficients
