<s>
Free	B-Operating_System
viewpoint	I-Operating_System
television	I-Operating_System
(	O
FTV	O
)	O
is	O
a	O
system	O
for	O
viewing	O
natural	O
video	O
,	O
allowing	O
the	O
user	O
to	O
interactively	O
control	O
the	O
viewpoint	O
and	O
generate	B-Algorithm
new	I-Algorithm
views	I-Algorithm
of	O
a	O
dynamic	O
scene	O
from	O
any	O
3D	O
position	O
.	O
</s>
<s>
The	O
equivalent	O
system	O
for	O
computer-simulated	B-Application
video	O
is	O
known	O
as	O
virtual	B-Application
reality	I-Application
.	O
</s>
<s>
Systems	O
for	O
rendering	O
arbitrary	O
views	O
of	O
natural	O
scenes	O
have	O
been	O
well	O
known	O
in	O
the	O
computer	B-Application
vision	I-Application
community	O
for	O
a	O
long	O
time	O
but	O
only	O
in	O
recent	O
years	O
has	O
the	O
speed	O
and	O
quality	O
reached	O
levels	O
that	O
are	O
suitable	O
for	O
serious	O
consideration	O
as	O
an	O
end-user	O
system	O
.	O
</s>
<s>
Professor	O
Masayuki	O
Tanimoto	O
from	O
Nagoya	O
University	O
(	O
Japan	O
)	O
has	O
done	O
much	O
to	O
promote	O
the	O
use	O
of	O
the	O
term	O
"	O
free	B-Operating_System
viewpoint	I-Operating_System
television	I-Operating_System
"	O
and	O
has	O
published	O
many	O
papers	O
on	O
the	O
ray	O
space	O
representation	O
,	O
although	O
other	O
techniques	O
can	O
be	O
,	O
and	O
are	O
used	O
for	O
FTV	O
.	O
</s>
<s>
QuickTime	B-Application
VR	I-Application
might	O
be	O
considered	O
a	O
predecessor	O
to	O
FTV	O
.	O
</s>
<s>
The	O
geometry	O
of	O
the	O
camera	O
set	O
up	O
must	O
be	O
measured	O
by	O
a	O
process	O
known	O
in	O
computer	B-Application
vision	I-Application
as	O
"	O
camera	O
calibration.	O
"	O
</s>
<s>
Restricted	O
free	B-Operating_System
viewpoint	I-Operating_System
television	I-Operating_System
views	O
for	O
large	O
environments	O
can	O
be	O
captured	O
from	O
a	O
single	O
location	O
camera	O
system	O
mounted	O
on	O
a	O
moving	O
platform	O
.	O
</s>
<s>
The	O
Google	B-Application
Street	I-Application
View	I-Application
capture	O
system	O
is	O
an	O
example	O
with	O
limited	O
functionality	O
.	O
</s>
<s>
This	O
may	O
not	O
be	O
such	O
a	O
big	O
disadvantage	O
as	O
there	O
are	O
representations	O
that	O
can	O
remove	O
the	O
redundancy	O
in	O
MVV	O
;	O
such	O
as	O
inter	O
view	O
coding	O
using	O
MPEG-4	B-Algorithm
or	O
Multiview	B-Algorithm
Video	I-Algorithm
Coding	I-Algorithm
,	O
the	O
ray	O
space	O
representation	O
,	O
geometry	O
videos	O
,	O
etc	O
.	O
</s>
<s>
The	O
Moving	O
Picture	O
Experts	O
Group	O
(	O
MPEG	O
)	O
has	O
normalized	O
Annex	O
H	O
of	O
MPEG-4	B-Application
AVC	I-Application
in	O
March	O
2009	O
called	O
Multiview	B-Algorithm
Video	I-Algorithm
Coding	I-Algorithm
after	O
the	O
work	O
of	O
a	O
group	O
called	O
'	O
3DAV	O
 '	O
(	O
3D	O
Audio	O
and	O
Visual	O
)	O
headed	O
by	O
Aljoscha	O
Smolic	O
at	O
the	O
Heinrich-Hertz	O
Institute	O
.	O
</s>
