<s>
Video	B-General_Concept
detection	I-General_Concept
and	I-General_Concept
ranging	I-General_Concept
(	O
VIDAR	O
)	O
is	O
a	O
technique	O
to	O
measure	O
the	O
speed	O
or	O
other	O
information	O
of	O
a	O
distant	O
vehicle	O
using	O
advanced	O
stereoscopic	B-Algorithm
imaging	I-Algorithm
techniques	O
.	O
</s>
<s>
VIDAR	O
technology	O
has	O
application	O
in	O
remote	B-Application
sensing	I-Application
,	O
traffic	B-General_Concept
enforcement	I-General_Concept
.	O
</s>
<s>
One	O
situation	O
where	O
VIDAR	O
has	O
notable	O
non-scientific	O
application	O
is	O
in	O
traffic	B-Application
speed	I-Application
enforcement	O
,	O
for	O
vehicle	O
speed	O
measurement	O
,	O
as	O
a	O
technology	O
alternative	O
to	O
radar	B-Application
guns	O
and	O
LIDAR	O
.	O
</s>
<s>
Unlike	O
RADAR	B-Application
which	O
relies	O
on	O
doppler	O
shifts	O
to	O
directly	O
measure	O
speed	O
or	O
LIDAR	O
which	O
relies	O
on	O
the	O
principle	O
of	O
time-of-flight	O
to	O
calculate	O
speed	O
,	O
VIDAR	O
measures	O
the	O
speed	O
of	O
vehicles	O
by	O
means	O
of	O
tracking	O
an	O
object	O
through	O
vision	O
cameras	O
.	O
</s>
<s>
High	O
precision	O
speed	O
measurement	O
can	O
be	O
achieved	O
if	O
stereoscopic	B-Algorithm
vision	O
techniques	O
are	O
used	O
.	O
</s>
