This module serves as an utility to graphically display the output of \verb+vpoint+ using \verb+fkview+.

{\large \bf Example}

\medskip

Compute line segments in \verb+building.tif+\\
\verb+align_mdl -c ksegs building.tif allsegs+\\
Display these segments\\
\verb+fkview -s -b building.tif ksegs+\\
Compute vanishing regions\\
\verb+vpoint -s csegs building.tif allsegs vpoints+\\
returns \verb+NVP = 3+ and \verb+NVP_masked = 0+\\
Display the first vanishing region\\
\verb+vpsegplot building.tif allsegs vpoints csegs 0 kvp0+\\
\verb+fkview -s -b building.tif kvp0+\\
Display segments not contributing to any vanishing region\\
\verb+vpsegplot building.tif allsegs vpoints csegs -1 kvp-none+\\
\verb+fkview -s -b building.tif kvp-none+\\

