<s>
A	O
3D	B-General_Concept
stereo	I-General_Concept
view	I-General_Concept
is	O
the	O
viewing	O
of	O
objects	O
through	O
any	O
stereo	O
pattern	O
.	O
</s>
<s>
The	O
stereoscope	O
is	O
a	O
binocular	O
device	O
through	O
which	O
a	O
pair	O
of	O
monocular	O
images	O
was	O
projected	O
to	O
both	O
eyes	O
in	O
such	O
a	O
way	O
that	O
the	O
optic	O
axes	O
converge	O
at	O
the	O
same	O
angle	O
,	O
which	O
gives	O
the	O
impression	O
of	O
a	O
3D	B-Algorithm
image	I-Algorithm
.	O
</s>
<s>
Brewster	O
used	O
what	O
he	O
discovered	O
in	O
building	O
the	O
stereo	B-Algorithm
camera	I-Algorithm
.	O
</s>
<s>
The	O
stereo	B-Algorithm
camera	I-Algorithm
combined	O
the	O
refracting	O
stereoscope	O
with	O
two	O
separate	O
cameras	O
which	O
were	O
placed	O
slightly	O
apart	O
.	O
</s>
<s>
And	O
then	O
in	O
1891	O
,	O
Louis	O
Ducas	O
du	O
Haron	O
created	O
the	O
first	O
printed	O
anaglyphs-photographs	O
consisting	O
of	O
two	O
negatives(one in blue or green, the other in red )	O
printed	O
on	O
the	O
same	O
sheet	O
of	O
paper	O
to	O
form	O
a	O
stereoscopic	B-Algorithm
photograph	I-Algorithm
.	O
</s>
<s>
If	O
one	O
has	O
two	O
eyes	O
,	O
fairly	O
healthy	O
eyesight	O
,	O
and	O
no	O
neurological	O
conditions	O
which	O
prevent	O
the	O
perception	O
of	O
depth	O
then	O
one	O
is	O
capable	O
of	O
learning	O
to	O
see	O
the	O
images	O
within	O
autostereograms	B-Algorithm
.	O
</s>
<s>
In	O
other	O
words	O
,	O
the	O
degree	O
of	O
decoupling	O
between	O
focusing	O
and	O
convergence	O
needed	O
to	O
visualize	O
an	O
autostereogram	B-Algorithm
is	O
reduced	O
.	O
</s>
<s>
Therefore	O
,	O
it	O
may	O
be	O
easier	O
for	O
first-time	O
autostereogram	B-Algorithm
viewers	O
to	O
"	O
see	O
"	O
their	O
first	O
3D	B-Algorithm
images	I-Algorithm
if	O
they	O
attempt	O
this	O
feat	O
with	O
bright	O
lighting	O
.	O
</s>
<s>
For	O
crossed-eyed	O
autostereograms	B-Algorithm
,	O
a	O
different	O
approach	O
needs	O
to	O
be	O
taken	O
.	O
</s>
<s>
A	O
3D	O
or	O
3-D	O
(	O
three-dimensional	O
)	O
film	O
or	O
S3D	O
(	O
stereoscopic	B-Algorithm
3D	I-Algorithm
)	O
film	O
is	O
a	O
motion	O
picture	O
that	O
enhances	O
the	O
illusion	O
of	O
depth	O
perception	O
.	O
</s>
<s>
The	O
most	O
common	O
approach	O
to	O
the	O
production	O
of	O
3D	B-Algorithm
films	I-Algorithm
is	O
derived	O
from	O
stereoscopic	B-Algorithm
photography	I-Algorithm
.	O
</s>
<s>
Some	O
methods	O
of	O
producing	O
3D	B-Algorithm
films	I-Algorithm
do	O
not	O
require	O
the	O
use	O
of	O
two	O
images	O
.	O
</s>
<s>
3D	B-Algorithm
films	I-Algorithm
are	O
not	O
limited	O
to	O
feature	O
film	O
theatrical	O
releases	O
;	O
television	O
broadcasts	O
and	O
direct-to-video	O
films	O
have	O
also	O
incorporated	O
similar	O
methods	O
,	O
especially	O
since	O
the	O
advent	O
of	O
3D	O
television	O
and	O
Blu-ray	O
3D	O
.	O
</s>
<s>
3D	B-Algorithm
films	I-Algorithm
have	O
existed	O
in	O
some	O
form	O
since	O
1915	O
,	O
but	O
had	O
been	O
largely	O
relegated	O
to	O
a	O
niche	O
in	O
the	O
motion	O
picture	O
industry	O
because	O
of	O
the	O
costly	O
hardware	O
and	O
processes	O
required	O
to	O
produce	O
and	O
display	O
a	O
3D	B-Algorithm
film	I-Algorithm
,	O
and	O
the	O
lack	O
of	O
a	O
standardized	O
format	O
for	O
all	O
segments	O
of	O
the	O
entertainment	O
business	O
.	O
</s>
<s>
Nonetheless	O
,	O
3D	B-Algorithm
films	I-Algorithm
were	O
prominently	O
featured	O
in	O
the	O
1950s	O
in	O
American	O
cinema	O
,	O
and	O
later	O
experienced	O
a	O
worldwide	O
resurgence	O
in	O
the	O
1980s	O
and	O
1990s	O
driven	O
by	O
IMAX	O
high-end	O
theaters	O
and	O
Disney	O
themed-venues	O
.	O
</s>
<s>
3D	B-Algorithm
films	I-Algorithm
became	O
more	O
and	O
more	O
successful	O
throughout	O
the	O
2000s	O
,	O
culminating	O
in	O
the	O
unprecedented	O
success	O
of	O
3D	O
presentations	O
of	O
Avatar	O
in	O
December	O
2009	O
and	O
January	O
2010	O
.	O
</s>
<s>
Machine	B-General_Concept
vision	I-General_Concept
(	O
MV	O
)	O
is	O
the	O
technology	O
and	O
methods	O
used	O
to	O
provide	O
imaging-based	O
automatic	O
inspection	O
and	O
analysis	O
for	O
such	O
applications	O
as	O
automatic	O
inspection	O
,	O
process	O
control	O
,	O
and	O
robot	O
guidance	O
in	O
industry	O
.	O
</s>
<s>
Autostereoscopy	B-Algorithm
is	O
any	O
method	O
of	O
displaying	O
stereoscopic	B-Algorithm
images	I-Algorithm
(	O
adding	O
binocular	O
perception	O
of	O
3D	O
depth	O
)	O
without	O
the	O
use	O
of	O
special	O
headgear	O
or	O
glasses	O
on	O
the	O
part	O
of	O
the	O
viewer	O
.	O
</s>
<s>
Because	O
headgear	O
is	O
not	O
required	O
,	O
it	O
is	O
also	O
called	O
"	O
glasses-free	B-Algorithm
3D	I-Algorithm
"	O
or	O
"	O
glassesless	B-Algorithm
3D	I-Algorithm
"	O
.	O
</s>
<s>
There	O
are	O
two	O
broad	O
approaches	O
currently	O
used	O
to	O
accommodate	O
motion	O
parallax	O
and	O
wider	O
viewing	O
angles	O
:	O
eye-tracking	B-General_Concept
,	O
and	O
multiple	O
views	O
so	O
that	O
the	O
display	O
does	O
not	O
need	O
to	O
sense	O
where	O
the	O
viewers	O
 '	O
eyes	O
are	O
located	O
.	O
</s>
<s>
Examples	O
of	O
autostereoscopic	B-Algorithm
displays	I-Algorithm
technology	O
include	O
lenticular	O
lens	O
,	O
parallax	O
barrier	O
,	O
volumetric	B-Algorithm
display	I-Algorithm
,	O
holographic	O
and	O
light	O
field	O
displays	O
.	O
</s>
