<s>
Structured	B-General_Concept
light	I-General_Concept
is	O
the	O
process	O
of	O
projecting	O
a	O
known	O
pattern	O
(	O
often	O
grids	O
or	O
horizontal	O
bars	O
)	O
on	O
to	O
a	O
scene	O
.	O
</s>
<s>
The	O
way	O
that	O
these	O
deform	O
when	O
striking	O
surfaces	O
allows	O
vision	O
systems	O
to	O
calculate	O
the	O
depth	O
and	O
surface	O
information	O
of	O
the	O
objects	O
in	O
the	O
scene	O
,	O
as	O
used	O
in	O
structured	B-Algorithm
light	I-Algorithm
3D	I-Algorithm
scanners	I-Algorithm
.	O
</s>
<s>
Invisible	O
(	O
or	O
imperceptible	O
)	O
structured	B-General_Concept
light	I-General_Concept
uses	O
structured	B-General_Concept
light	I-General_Concept
without	O
interfering	O
with	O
other	O
computer	O
vision	O
tasks	O
for	O
which	O
the	O
projected	O
pattern	O
will	O
be	O
confusing	O
.	O
</s>
<s>
Structured	B-General_Concept
light	I-General_Concept
is	O
used	O
by	O
a	O
number	O
of	O
police	O
forces	O
for	O
the	O
purpose	O
of	O
photographing	O
fingerprints	O
in	O
a	O
3D	O
scene	O
.	O
</s>
