|There is a choice of
light curtain (side view profile) or overhead laser scanner (top-down view
profile) as shown in the figure on the right.
|Shown in the figure
on the left is a side view profile generated by a light curtain scanner. The
software is able to identify that it is a car towing another car with a tow
bar and not two discrete, separate cars.
The light curtain scan here was taken from a TDS 110 installed at the
Tacony-Palmyra Bridge, Burlington County, New Jersey that was used for
vehicle classification for purposes of toll collection.