striper.icn: Program to make striped pattern from image edge

This program takes the left column or top row of pixels of an image
and creates a 1 x n or n x 1 image file from it.  The result, when
tiled, is a striped pattern.

This program is useful for creating regular striped patterns from
scans.

The following options are supported:

     -d s    stripe direction:
                "h"  horizontal (the default)
                "v"  vertical
                "b"  both horizontal and vertical
     -p s    prefix for GIF file names, default "stripes_"
     -w i    width of swatch, default 1
     -x i    x offset, default 0
     -y i    y offset, default 0